1
|
Collins SM, Köster U, Robinson AP, Ivanov P, Cocolios TE, Russell B, Fenwick AJ, Bernerd C, Stegemann S, Johnston K, Gerami AM, Chrysalidis K, Mohamud H, Ramirez N, Bhaisare A, Mewburn-Crook J, Cullen DM, Pietras B, Pells S, Dockx K, Stucki N, Regan PH. Determination of the Terbium-152 half-life from mass-separated samples from CERN-ISOLDE and assessment of the radionuclide purity. Appl Radiat Isot 2023; 202:111044. [PMID: 37797447 DOI: 10.1016/j.apradiso.2023.111044] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/15/2023] [Accepted: 09/22/2023] [Indexed: 10/07/2023]
Abstract
Terbium-152 is one of four terbium radioisotopes that together form a potential theranostic toolbox for the personalised treatment of tumours. As 152 Tb decay by positron emission it can be utilised for diagnostics by positron emission tomography. For use in radiopharmaceuticals and for activity measurements by an activity calibrator a high radionuclide purity of the material and an accurate and precise knowledge of the half-life is required. Mass-separation and radiochemical purification provide a production route of high purity 152Tb. In the current work, two mass-separated samples from the CERN-ISOLDE facility have been assayed at the National Physical Laboratory to investigate the radionuclide purity. These samples have been used to perform four measurements of the half-life by three independent techniques: high-purity germanium gamma-ray spectrometry, ionisation chamber measurements and liquid scintillation counting. From the four measurement campaigns a half-life of 17.8784(95) h has been determined. The reported half-life shows a significant difference to the currently evaluated half-life (ζ-score = 3.77), with a relative difference of 2.2 % and an order of magnitude improvement in the precision. This work also shows that under controlled conditions the combination of mass-separation and radiochemical separation can provide high-purity 152Tb.
Collapse
Affiliation(s)
- S M Collins
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK; School of Mathematics and Physics, University of Surrey, Guildford, GU2 7XH, UK.
| | - U Köster
- Institut Laue-Langevin, 38042, Grenoble, France
| | - A P Robinson
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK; Christie Medical Physics and Engineering (CMPE), The Christie NHS Foundation Trust, Manchester, M20 4BX, UK; The University of Manchester, Manchester, M13 9PL, UK
| | - P Ivanov
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - T E Cocolios
- KU Leuven, Institute for Nuclear and Radiation Physics, Celestijnenlaan 200D, 3001, Leuven, Belgium
| | - B Russell
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - A J Fenwick
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - C Bernerd
- KU Leuven, Institute for Nuclear and Radiation Physics, Celestijnenlaan 200D, 3001, Leuven, Belgium; CERN - European Organization for Nuclear Research, Esplanade des Particules 1, 1217, Meyrin, Switzerland
| | - S Stegemann
- KU Leuven, Institute for Nuclear and Radiation Physics, Celestijnenlaan 200D, 3001, Leuven, Belgium
| | - K Johnston
- CERN - European Organization for Nuclear Research, Esplanade des Particules 1, 1217, Meyrin, Switzerland
| | - A M Gerami
- CERN - European Organization for Nuclear Research, Esplanade des Particules 1, 1217, Meyrin, Switzerland
| | - K Chrysalidis
- CERN - European Organization for Nuclear Research, Esplanade des Particules 1, 1217, Meyrin, Switzerland
| | - H Mohamud
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - N Ramirez
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - A Bhaisare
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - J Mewburn-Crook
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - D M Cullen
- The University of Manchester, Manchester, M13 9PL, UK
| | - B Pietras
- The University of Manchester, Manchester, M13 9PL, UK
| | - S Pells
- The University of Manchester, Manchester, M13 9PL, UK
| | - K Dockx
- KU Leuven, Institute for Nuclear and Radiation Physics, Celestijnenlaan 200D, 3001, Leuven, Belgium
| | - N Stucki
- HEPIA, HES-SO, University of Applied Sciences and Arts Western Switzerland, Rue de la Prairie 4, 1202, Geneva, Switzerland
| | - P H Regan
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK; School of Mathematics and Physics, University of Surrey, Guildford, GU2 7XH, UK
| |
Collapse
|
2
|
Pérez-Vidal RM, Gadea A, Domingo-Pardo C, Gargano A, Valiente-Dobón JJ, Clément E, Lemasson A, Coraggio L, Siciliano M, Szilner S, Bast M, Braunroth T, Collado J, Corina A, Dewald A, Doncel M, Dudouet J, de France G, Fransen C, González V, Hüyük T, Jacquot B, John PR, Jungclaus A, Kim YH, Korichi A, Labiche M, Lenzi S, Li H, Ljungvall J, López-Martens A, Mengoni D, Michelagnoli C, Müller-Gatermann C, Napoli DR, Navin A, Quintana B, Ramos D, Rejmund M, Sanchis E, Simpson J, Stezowski O, Wilmsen D, Zielińska M, Boston AJ, Barrientos D, Bednarczyk P, Benzoni G, Birkenbach B, Boston HC, Bracco A, Cederwall B, Cullen DM, Didierjean F, Eberth J, Gottardo A, Goupil J, Harkness-Brennan LJ, Hess H, Judson DS, Kaşkaş A, Korten W, Leoni S, Menegazzo R, Million B, Nyberg J, Podolyak Z, Pullia A, Ralet D, Recchia F, Reiter P, Rezynkina K, Salsac MD, Şenyiğit M, Sohler D, Theisen C, Verney D. Evidence of Partial Seniority Conservation in the πg_{9/2} Shell for the N=50 Isotones. Phys Rev Lett 2022; 129:112501. [PMID: 36154392 DOI: 10.1103/physrevlett.129.112501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 02/08/2022] [Accepted: 07/29/2022] [Indexed: 06/16/2023]
Abstract
The reduced transition probabilities for the 4_{1}^{+}→2_{1}^{+} and 2_{1}^{+}→0_{1}^{+} transitions in ^{92}Mo and ^{94}Ru and for the 4_{1}^{+}→2_{1}^{+} and 6_{1}^{+}→4_{1}^{+} transitions in ^{90}Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the f_{5/2}, p_{3/2}, p_{1/2}, and g_{9/2} proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the N=50 g_{9/2} orbital to be understood. The conclusion is that seniority is largely conserved in the first πg_{9/2} orbital.
Collapse
Affiliation(s)
- R M Pérez-Vidal
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia E-46980, Spain
- INFN Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - A Gadea
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia E-46980, Spain
| | - C Domingo-Pardo
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia E-46980, Spain
| | - A Gargano
- INFN Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
| | | | - E Clément
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - A Lemasson
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - L Coraggio
- INFN Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
- Dipartimento di Matematica e Fisica, Università degli Studi della Campania "Luigi Vanvitelli", viale Abramo Lincoln 5, I-81100 Caserta, Italy
| | - M Siciliano
- Physics Division, Argonne National Laboratory, Lemont, 60439 Illinois, USA
| | - S Szilner
- Ruder Bošković Institute, 10000 Zagreb, Croatia
| | - M Bast
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - T Braunroth
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - J Collado
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, E-46100 Valencia, Spain
| | - A Corina
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia BC V5A 1S6, Canada
| | - A Dewald
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - M Doncel
- Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden
| | - J Dudouet
- Université Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, F-69622 Villeurbanne, France
| | - G de France
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - C Fransen
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - V González
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, E-46100 Valencia, Spain
| | - T Hüyük
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia E-46980, Spain
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - B Jacquot
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - P R John
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - Y H Kim
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - A Korichi
- IJCLab Orsay, IN2P3-CNRS, Université Paris-Saclay and Université Paris-Sud, 91405 Orsay, France
| | - M Labiche
- STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - S Lenzi
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - H Li
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - J Ljungvall
- IJCLab Orsay, IN2P3-CNRS, Université Paris-Saclay and Université Paris-Sud, 91405 Orsay, France
| | - A López-Martens
- IJCLab Orsay, IN2P3-CNRS, Université Paris-Saclay and Université Paris-Sud, 91405 Orsay, France
| | - D Mengoni
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - C Michelagnoli
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble, France
| | - C Müller-Gatermann
- Physics Division, Argonne National Laboratory, Lemont, 60439 Illinois, USA
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - D R Napoli
- INFN Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - A Navin
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - B Quintana
- Laboratorio de Radiaciones Ionizantes, Universidad de Salamanca, E-37008 Salamanca, Spain
| | - D Ramos
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - M Rejmund
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - E Sanchis
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, E-46100 Valencia, Spain
| | - J Simpson
- STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - O Stezowski
- Université Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, F-69622 Villeurbanne, France
| | - D Wilmsen
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - M Zielińska
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A J Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | | | - P Bednarczyk
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - G Benzoni
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - H C Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Bracco
- INFN Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy
| | - B Cederwall
- Department of Physics, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - D M Cullen
- Nuclear Physics Group, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - F Didierjean
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - A Gottardo
- INFN Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - J Goupil
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - L J Harkness-Brennan
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - H Hess
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - D S Judson
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Kaşkaş
- Department of Physics, Ankara University, 06100 Besevler-Ankara, Turkey
| | - W Korten
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - S Leoni
- INFN Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy
| | - R Menegazzo
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - B Million
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - J Nyberg
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - Zs Podolyak
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - A Pullia
- INFN Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy
| | - D Ralet
- Grand Accélérateur National d'Ions Lourds, CEA/DRF-CNRS/IN2P3, F-14076 Caen cedex 5, France
| | - F Recchia
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - K Rezynkina
- INFN Sezione di Padova, I-35131 Padova, Italy
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - M D Salsac
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Şenyiğit
- Department of Physics, Ankara University, 06100 Besevler-Ankara, Turkey
| | - D Sohler
- Institute for Nuclear Research, Atomki, 4001 Debrecen, P.O. Box 51, Hungary
| | - Ch Theisen
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - D Verney
- IJCLab Orsay, IN2P3-CNRS, Université Paris-Saclay and Université Paris-Sud, 91405 Orsay, France
| |
Collapse
|
3
|
Cederwall B, Liu X, Aktas Ö, Ertoprak A, Zhang W, Qi C, Clément E, de France G, Ralet D, Gadea A, Goasduff A, Jaworski G, Kuti I, Nyakó BM, Nyberg J, Palacz M, Wadsworth R, Valiente-Dobón JJ, Al-Azri H, Ataç Nyberg A, Bäck T, de Angelis G, Doncel M, Dudouet J, Gottardo A, Jurado M, Ljungvall J, Mengoni D, Napoli DR, Petrache CM, Sohler D, Timár J, Barrientos D, Bednarczyk P, Benzoni G, Birkenbach B, Boston AJ, Boston HC, Burrows I, Charles L, Ciemala M, Crespi FCL, Cullen DM, Désesquelles P, Domingo-Pardo C, Eberth J, Erduran N, Ertürk S, González V, Goupil J, Hess H, Huyuk T, Jungclaus A, Korten W, Lemasson A, Leoni S, Maj A, Menegazzo R, Million B, Perez-Vidal RM, Podolyak Z, Pullia A, Recchia F, Reiter P, Saillant F, Salsac MD, Sanchis E, Simpson J, Stezowski O, Theisen C, Zielińska M. Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus ^{88}Ru. Phys Rev Lett 2020; 124:062501. [PMID: 32109090 DOI: 10.1103/physrevlett.124.062501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/27/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
The low-lying energy spectrum of the extremely neutron-deficient self-conjugate (N=Z) nuclide _{44}^{88}Ru_{44} has been measured using the combination of the Advanced Gamma Tracking Array (AGATA) spectrometer, the NEDA and Neutron Wall neutron detector arrays, and the DIAMANT charged particle detector array. Excited states in ^{88}Ru were populated via the ^{54}Fe(^{36}Ar,2nγ)^{88}Ru^{*} fusion-evaporation reaction at the Grand Accélérateur National d'Ions Lourds (GANIL) accelerator complex. The observed γ-ray cascade is assigned to ^{88}Ru using clean prompt γ-γ-2-neutron coincidences in anticoincidence with the detection of charged particles, confirming and extending the previously assigned sequence of low-lying excited states. It is consistent with a moderately deformed rotating system exhibiting a band crossing at a rotational frequency that is significantly higher than standard theoretical predictions with isovector pairing, as well as observations in neighboring N>Z nuclides. The direct observation of such a "delayed" rotational alignment in a deformed N=Z nucleus is in agreement with theoretical predictions related to the presence of strong isoscalar neutron-proton pair correlations.
Collapse
Affiliation(s)
- B Cederwall
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - X Liu
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - Ö Aktas
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - A Ertoprak
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler/Fatih, 34134 Istanbul, Turkey
| | - W Zhang
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - C Qi
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - E Clément
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
| | - G de France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
| | - D Ralet
- Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - A Gadea
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46980 Valencia, Spain
| | - A Goasduff
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - G Jaworski
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
- Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5A,02-093 Warszawa, Poland
| | - I Kuti
- MTA Atomki, H-4001 Debrecen, Hungary
| | - B M Nyakó
- MTA Atomki, H-4001 Debrecen, Hungary
| | - J Nyberg
- Department of Physics and Astronomy, Uppsala University, SE-75121 Uppsala, Sweden
| | - M Palacz
- Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5A,02-093 Warszawa, Poland
| | - R Wadsworth
- Department of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom
| | - J J Valiente-Dobón
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - H Al-Azri
- Rustaq College of Education, Department of Science, 329 Al-Rustaq, Sultanate of Oman
| | - A Ataç Nyberg
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - T Bäck
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - G de Angelis
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - M Doncel
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - J Dudouet
- Université Lyon, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - A Gottardo
- Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - M Jurado
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46980 Valencia, Spain
| | - J Ljungvall
- Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - D Mengoni
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - D R Napoli
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - C M Petrache
- Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - D Sohler
- MTA Atomki, H-4001 Debrecen, Hungary
| | - J Timár
- MTA Atomki, H-4001 Debrecen, Hungary
| | | | - P Bednarczyk
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - G Benzoni
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
| | - A J Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - H C Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - I Burrows
- STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, United Kingdom
| | - L Charles
- IPHC, UNISTRA, CNRS, 23 rue du Loess, 67200 Strasbourg, France
| | - M Ciemala
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - F C L Crespi
- University of Milano, Department of Physics, I-20133 Milano, Italy
- INFN Milano, I-20133 Milano, Italy
| | - D M Cullen
- Nuclear Physics Group, Schuster Laboratory, University of Manchester, Manchester, M13 9PL, United Kingdom
| | - P Désesquelles
- Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
- CNRS-IN2P3, Universiteé Paris-Saclay, Bat 104, F-91405 Orsay Campus, France
| | - C Domingo-Pardo
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
| | - N Erduran
- Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University, 34303, Istanbul, Turkey
| | - S Ertürk
- Department of Physics, University of Nigde, 51240 Nigde, Turkey
| | - V González
- Departamento de Ingeniería Electrónica, Universitat de Valencia, 46100 Burjassot, Valencia, Spain
| | - J Goupil
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
| | - H Hess
- Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
| | - T Huyuk
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46980 Valencia, Spain
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - W Korten
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Lemasson
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
| | - S Leoni
- University of Milano, Department of Physics, I-20133 Milano, Italy
- INFN Milano, I-20133 Milano, Italy
| | - A Maj
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | | | | | - R M Perez-Vidal
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - Zs Podolyak
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - A Pullia
- University of Milano, Department of Physics, I-20133 Milano, Italy
- INFN Milano, I-20133 Milano, Italy
| | - F Recchia
- Dipartimento di Fisica e Astronomia dell'Università di Padova and INFN Padova, I-35131 Padova, Italy
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
| | - F Saillant
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
| | - M D Salsac
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - E Sanchis
- Departamento de Ingeniería Electrónica, Universitat de Valencia, 46100 Burjassot, Valencia, Spain
| | - J Simpson
- STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, United Kingdom
| | - O Stezowski
- Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - Ch Theisen
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Zielińska
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| |
Collapse
|
4
|
Delafosse C, Verney D, Marević P, Gottardo A, Michelagnoli C, Lemasson A, Goasduff A, Ljungvall J, Clément E, Korichi A, De Angelis G, Andreoiu C, Babo M, Boso A, Didierjean F, Dudouet J, Franchoo S, Gadea A, Georgiev G, Ibrahim F, Jacquot B, Konstantinopoulos T, Lenzi SM, Maquart G, Matea I, Mengoni D, Napoli DR, Nikšić T, Olivier L, Pérez-Vidal RM, Portail C, Recchia F, Redon N, Siciliano M, Stefan I, Stezowski O, Vretenar D, Zielinska M, Barrientos D, Benzoni G, Birkenbach B, Boston AJ, Boston HC, Cederwall B, Charles L, Ciemala M, Collado J, Cullen DM, Désesquelles P, de France G, Domingo-Pardo C, Eberth J, González V, Harkness-Brennan LJ, Hess H, Judson DS, Jungclaus A, Korten W, Lefevre A, Legruel F, Menegazzo R, Million B, Nyberg J, Quintana B, Ralet D, Reiter P, Saillant F, Sanchis E, Theisen C, Valiente Dobon JJ. Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the ^{78}Ni Region: A Hint from Lifetime Measurements. Phys Rev Lett 2018; 121:192502. [PMID: 30468583 DOI: 10.1103/physrevlett.121.192502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/27/2018] [Indexed: 06/09/2023]
Abstract
Lifetime measurements of excited states of the light N=52 isotones ^{88}Kr, ^{86}Se, and ^{84}Ge have been performed, using the recoil distance Doppler shift method and VAMOS and AGATA spectrometers for particle identification and gamma spectroscopy, respectively. The reduced electric quadrupole transition probabilities B(E2;2^{+}→0^{+}) and B(E2;4^{+}→2^{+}) were obtained for the first time for the hard-to-reach ^{84}Ge. While the B(E2;2^{+}→0^{+}) values of ^{88}Kr, ^{86}Se saturate the maximum quadrupole collectivity offered by the natural valence (3s, 2d, 1g_{7/2}, 1h_{11/2}) space of an inert ^{78}Ni core, the value obtained for ^{84}Ge largely exceeds it, suggesting that shape coexistence phenomena, previously reported at N≲49, extend beyond N=50. The onset of collectivity at Z=32 is understood as due to a pseudo-SU(3) organization of the proton single-particle sequence reflecting a clear manifestation of pseudospin symmetry. It is realized that the latter provides actually reliable guidance for understanding the observed proton and neutron single particle structure in the whole medium-mass region, from Ni to Sn, pointing towards the important role of the isovector-vector ρ field in shell-structure evolution.
Collapse
Affiliation(s)
- C Delafosse
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - D Verney
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - P Marević
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - A Gottardo
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - C Michelagnoli
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - A Lemasson
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - A Goasduff
- Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - J Ljungvall
- CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - E Clément
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - A Korichi
- CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - G De Angelis
- Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - C Andreoiu
- Departement of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A S16, Canada
| | - M Babo
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - A Boso
- Departimento di Fisica e Astronomia, Università di Padova, and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - F Didierjean
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - J Dudouet
- Université Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - S Franchoo
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - A Gadea
- IFIC, CSIC-Universitat Valencia, Apartado Oficial 22085, 46071 Valencia, Spain
| | - G Georgiev
- CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - F Ibrahim
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - B Jacquot
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - T Konstantinopoulos
- CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - S M Lenzi
- Departimento di Fisica e Astronomia, Università di Padova, and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - G Maquart
- Université Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - I Matea
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - D Mengoni
- Departimento di Fisica e Astronomia, Università di Padova, and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - D R Napoli
- Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - T Nikšić
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička c. 32, 10000 Zagreb, Croatia
| | - L Olivier
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - R M Pérez-Vidal
- IFIC, CSIC-Universitat Valencia, Apartado Oficial 22085, 46071 Valencia, Spain
| | - C Portail
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - F Recchia
- Departimento di Fisica e Astronomia, Università di Padova, and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - N Redon
- Université Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - M Siciliano
- Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - I Stefan
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - O Stezowski
- Université Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - D Vretenar
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička c. 32, 10000 Zagreb, Croatia
| | - M Zielinska
- CEA de Saclay, IRFU, F-91191 Gif-sur-Yvette, France
| | | | - G Benzoni
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - A J Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - H C Boston
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - B Cederwall
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - L Charles
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - M Ciemala
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
| | - J Collado
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, Valencia 46100, Spain
| | - D M Cullen
- Nuclear Physics Group, Schuster Laboratory, University of Manchester, Manchester, M13 9PL, United Kingdom
| | - P Désesquelles
- CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - G de France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - C Domingo-Pardo
- IFIC, CSIC-Universitat Valencia, Apartado Oficial 22085, 46071 Valencia, Spain
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - V González
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, Valencia 46100, Spain
| | - L J Harkness-Brennan
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - H Hess
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - D S Judson
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - W Korten
- CEA de Saclay, IRFU, F-91191 Gif-sur-Yvette, France
| | - A Lefevre
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - F Legruel
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - R Menegazzo
- Departimento di Fisica e Astronomia, Università di Padova, and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - B Million
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - J Nyberg
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - B Quintana
- Laboratorio de Radiaciones Ionizantes, Universidad de Salamanca, E-37008 Salamanca, Spain
| | - D Ralet
- CSNSM, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay, France
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - F Saillant
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen F-14076, France
| | - E Sanchis
- Departamento de Ingeniería Electrónica, Universitat de Valencia, Burjassot, Valencia 46100, Spain
| | - Ch Theisen
- CEA de Saclay, IRFU, F-91191 Gif-sur-Yvette, France
| | - J J Valiente Dobon
- Instituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| |
Collapse
|
5
|
Cederwall B, Doncel M, Aktas Ö, Ertoprak A, Liotta R, Qi C, Grahn T, Cullen DM, Hodge D, Giles M, Stolze S, Badran H, Braunroth T, Calverley T, Cox DM, Fang YD, Greenlees PT, Hilton J, Ideguchi E, Julin R, Juutinen S, Raju MK, Li H, Liu H, Matta S, Modamio V, Pakarinen J, Papadakis P, Partanen J, Petrache CM, Rahkila P, Ruotsalainen P, Sandzelius M, Sarén J, Scholey C, Sorri J, Subramaniam P, Taylor MJ, Uusitalo J, Valiente-Dobón JJ. Lifetime Measurements of Excited States in ^{172}Pt and the Variation of Quadrupole Transition Strength with Angular Momentum. Phys Rev Lett 2018; 121:022502. [PMID: 30085703 DOI: 10.1103/physrevlett.121.022502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 04/19/2018] [Indexed: 06/08/2023]
Abstract
Lifetimes of the first excited 2^{+} and 4^{+} states in the extremely neutron-deficient nuclide ^{172}Pt have been measured for the first time using the recoil-distance Doppler shift and recoil-decay tagging techniques. An unusually low value of the ratio B(E2:4_{1}^{+}→2_{1}^{+})/B(E2:2_{1}^{+}→0_{gs}^{+})=0.55(19) was found, similar to a handful of other such anomalous cases observed in the entire Segré chart. The observation adds to a cluster of a few extremely neutron-deficient nuclides of the heavy transition metals with neutron numbers N≈90-94 featuring the effect. No theoretical model calculations reported to date have been able to explain the anomalously low B(E2:4_{1}^{+}→2_{1}^{+})/B(E2:2_{1}^{+}→0_{gs}^{+}) ratios observed in these cases. Such low values cannot, e.g., be explained within the framework of the geometrical collective model or by algebraic approaches within the interacting boson model framework. It is proposed that the group of B(E2:4_{1}^{+}→2_{1}^{+})/B(E2:2_{1}^{+}→0_{gs}^{+}) ratios in the extremely neutron-deficient even-even W, Os, and Pt nuclei around neutron numbers N≈90-94 reveal a quantum phase transition from a seniority-conserving structure to a collective regime as a function of neutron number. Although a system governed by seniority symmetry is the only theoretical framework for which such an effect may naturally occur, the phenomenon is highly unexpected for these nuclei that are not situated near closed shells.
Collapse
Affiliation(s)
- B Cederwall
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - M Doncel
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - Ö Aktas
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - A Ertoprak
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler/Fatih, 34134 Istanbul, Turkey
| | - R Liotta
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - C Qi
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - T Grahn
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - D M Cullen
- Schuster Building, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - D Hodge
- Schuster Building, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - M Giles
- Schuster Building, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - S Stolze
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - H Badran
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - T Braunroth
- Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
| | - T Calverley
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - D M Cox
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Y D Fang
- Research Center for Nuclear Physics, Osaka University, JP-567-0047 Osaka, Japan
| | - P T Greenlees
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - J Hilton
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - E Ideguchi
- Research Center for Nuclear Physics, Osaka University, JP-567-0047 Osaka, Japan
| | - R Julin
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - S Juutinen
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - M Kumar Raju
- Research Center for Nuclear Physics, Osaka University, JP-567-0047 Osaka, Japan
| | - H Li
- Grand Accélérateur National dâIons Lourds (GANIL), CEA/DSMâCNRS/IN2P3, F-14076 Caen Cedex 5, France
| | - H Liu
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - S Matta
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - V Modamio
- Department of Physics, University of Oslo, NO-0316 Oslo, Norway
| | - J Pakarinen
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - P Papadakis
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - J Partanen
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - C M Petrache
- Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - P Rahkila
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - P Ruotsalainen
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - M Sandzelius
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - J Sarén
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - C Scholey
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - J Sorri
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - P Subramaniam
- KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - M J Taylor
- Division of Cancer Sciences, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, United Kingdom
| | - J Uusitalo
- epartment of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - J J Valiente-Dobón
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| |
Collapse
|
6
|
Dudouet J, Lemasson A, Duchêne G, Rejmund M, Clément E, Michelagnoli C, Didierjean F, Korichi A, Maquart G, Stezowski O, Lizarazo C, Pérez-Vidal RM, Andreoiu C, de Angelis G, Astier A, Delafosse C, Deloncle I, Dombradi Z, de France G, Gadea A, Gottardo A, Jacquot B, Jones P, Konstantinopoulos T, Kuti I, Le Blanc F, Lenzi SM, Li G, Lozeva R, Million B, Napoli DR, Navin A, Petrache CM, Pietralla N, Ralet D, Ramdhane M, Redon N, Schmitt C, Sohler D, Verney D, Barrientos D, Birkenbach B, Burrows I, Charles L, Collado J, Cullen DM, Désesquelles P, Domingo Pardo C, González V, Harkness-Brennan L, Hess H, Judson DS, Karolak M, Korten W, Labiche M, Ljungvall J, Menegazzo R, Mengoni D, Pullia A, Recchia F, Reiter P, Salsac MD, Sanchis E, Theisen C, Valiente-Dobón JJ, Zielińska M. _{36}^{96}Kr_{60}-Low-Z Boundary of the Island of Deformation at N=60. Phys Rev Lett 2017; 118:162501. [PMID: 28474951 DOI: 10.1103/physrevlett.118.162501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Indexed: 06/07/2023]
Abstract
Prompt γ-ray spectroscopy of the neutron-rich ^{96}Kr, produced in transfer- and fusion-induced fission reactions, has been performed using the combination of the Advanced Gamma Tracking Array and the VAMOS++ spectrometer. A second excited state, assigned to J^{π}=4^{+}, is observed for the first time, and a previously reported level energy of the first 2^{+} excited state is confirmed. The measured energy ratio R_{4/2}=E(4^{+})/E(2^{+})=2.12(1) indicates that this nucleus does not show a well-developed collectivity contrary to that seen in heavier N=60 isotones. This new measurement highlights an abrupt transition of the degree of collectivity as a function of the proton number at Z=36, of similar amplitude to that observed at N=60 at higher Z values. A possible reason for this abrupt transition could be related to the insufficient proton excitations in the g_{9/2}, d_{5/2}, and s_{1/2} orbitals to generate strong quadrupole correlations or to the coexistence of competing different shapes. An unexpected continuous decrease of R_{4/2} as a function of the neutron number up to N=60 is also evidenced. This measurement establishes the Kr isotopic chain as the low-Z boundary of the island of deformation for N=60 isotones. A comparison with available theoretical predictions using different beyond mean-field approaches shows that these models fail to reproduce the abrupt transitions at N=60 and Z=36.
Collapse
Affiliation(s)
- J Dudouet
- Université, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622 Villeurbanne, France
| | - A Lemasson
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - G Duchêne
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - M Rejmund
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - E Clément
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - C Michelagnoli
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - F Didierjean
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - A Korichi
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - G Maquart
- Université, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622 Villeurbanne, France
| | - O Stezowski
- Université, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622 Villeurbanne, France
| | - C Lizarazo
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- GSI, Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - R M Pérez-Vidal
- Instituto de Física Corpuscular, CSIC-Universitat de València, E-46980 Valencia, Spain
| | - C Andreoiu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - G de Angelis
- INFN, Laboratori Nazionali di Legnaro, Via Romea 4, I-35020 Legnaro, Italy
| | - A Astier
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - C Delafosse
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris Sud, Université Paris Saclay, 91406 Orsay Cedex, France
| | - I Deloncle
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - Z Dombradi
- Institute for Nuclear Research of the Hungarian Academy of Sciences, Pf. 51, H-4001 Debrecen, Hungary
| | - G de France
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - A Gadea
- Instituto de Física Corpuscular, CSIC-Universitat de València, E-46980 Valencia, Spain
| | - A Gottardo
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris Sud, Université Paris Saclay, 91406 Orsay Cedex, France
| | - B Jacquot
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - P Jones
- iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West, 7129 South Africa
| | - T Konstantinopoulos
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - I Kuti
- Institute for Nuclear Research of the Hungarian Academy of Sciences, Pf. 51, H-4001 Debrecen, Hungary
| | - F Le Blanc
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - S M Lenzi
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - G Li
- GSI, Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - R Lozeva
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - B Million
- INFN, Sezione di Milano, Milano 20133, Italy
| | - D R Napoli
- INFN, Laboratori Nazionali di Legnaro, Via Romea 4, I-35020 Legnaro, Italy
| | - A Navin
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - C M Petrache
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - N Pietralla
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - D Ralet
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - M Ramdhane
- LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble Cedex, France
| | - N Redon
- Université, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622 Villeurbanne, France
| | - C Schmitt
- GANIL, CEA/DRF-CNRS/IN2P3, BP 55027, 14076 Caen cedex 5, France
| | - D Sohler
- Institute for Nuclear Research of the Hungarian Academy of Sciences, Pf. 51, H-4001 Debrecen, Hungary
| | - D Verney
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris Sud, Université Paris Saclay, 91406 Orsay Cedex, France
| | | | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - I Burrows
- STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - L Charles
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - J Collado
- Departamento de Ingeniería Electrónica, Universitat de Valencia, 46100 Burjassot, Valencia, Spain
| | - D M Cullen
- Nuclear Physics Group, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - P Désesquelles
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - C Domingo Pardo
- Instituto de Física Corpuscular, CSIC-Universitat de València, E-46980 Valencia, Spain
| | - V González
- Departamento de Ingeniería Electrónica, Universitat de Valencia, 46100 Burjassot, Valencia, Spain
| | - L Harkness-Brennan
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - H Hess
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - D S Judson
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom
| | - M Karolak
- IRFU, CEA/DRF, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - W Korten
- IRFU, CEA/DRF, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - M Labiche
- STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - J Ljungvall
- CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405 Orsay, France
| | - R Menegazzo
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - D Mengoni
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - A Pullia
- INFN, Sezione di Milano, Milano 20133, Italy
- Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy
| | - F Recchia
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università di Padova, I-35131 Padova, Italy
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
| | - M D Salsac
- IRFU, CEA/DRF, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - E Sanchis
- Departamento de Ingeniería Electrónica, Universitat de Valencia, 46100 Burjassot, Valencia, Spain
| | - Ch Theisen
- IRFU, CEA/DRF, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - J J Valiente-Dobón
- INFN, Laboratori Nazionali di Legnaro, Via Romea 4, I-35020 Legnaro, Italy
| | - M Zielińska
- IRFU, CEA/DRF, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| |
Collapse
|
7
|
Podolyák Z, Shand CM, Lalović N, Gerl J, Rudolph D, Alexander T, Boutachkov P, Cortés ML, Górska M, Kojouharov I, Kurz N, Louchart C, Merchán E, Michelagnoli C, Pérez-Vidal RM, Pietri S, Ralet D, Reese M, Schaffner H, Stahl C, Weick H, Ameil F, de Angelis G, Arici T, Carroll R, Dombrádi Z, Gadea A, Golubev P, Lettmann M, Lizarazo C, Mahboub D, Pai H, Patel Z, Pietralla N, Regan PH, Sarmiento LG, Wieland O, Wilson E, Birkenbach B, Bruyneel B, Burrows I, Charles L, Clément E, Crespi FCL, Cullen DM, Désesquelles P, Eberth J, González V, Habermann T, Harkness-Brennan L, Hess H, Judson DS, Jungclaus A, Korten W, Labiche M, Maj A, Mengoni D, Napoli DR, Pullia A, Quintana B, Rainovski G, Reiter P, Salsac MD, Sanchis E, Valiente Dóbon JJ. Role of the Δ Resonance in the Population of a Four-Nucleon State in the ^{56}Fe→^{54}Fe Reaction at Relativistic Energies. Phys Rev Lett 2016; 117:222302. [PMID: 27925748 DOI: 10.1103/physrevlett.117.222302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Indexed: 06/06/2023]
Abstract
The ^{54}Fe nucleus was populated from a ^{56}Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10^{+} metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the ^{56}Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of ^{54}Fe, suggesting that it was populated via the decay of the Δ^{0} resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10^{+} metastable state in ^{54}Fe is a consequence of the quark structure of the nucleons.
Collapse
Affiliation(s)
- Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - C M Shand
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - N Lalović
- Department of Physics, Lund University, S-22100 Lund, Sweden
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - J Gerl
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D Rudolph
- Department of Physics, Lund University, S-22100 Lund, Sweden
| | - T Alexander
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P Boutachkov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M L Cortés
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - M Górska
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - C Louchart
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - E Merchán
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - C Michelagnoli
- GANIL, CEA/DRF-CNRS/IN2P3, F-14076 Caen Cedex 05, France
| | - R M Pérez-Vidal
- Instituto de Fisica Corpuscular, Universitat de Valencia, E-46980 Valencia, Spain
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D Ralet
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - M Reese
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Ch Stahl
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - F Ameil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - G de Angelis
- INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - T Arici
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - R Carroll
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Zs Dombrádi
- Institute for Nuclear Research, Hungarian Academy of Sciences, P.O. Box 51, Debrecen H-4001, Hungary
| | - A Gadea
- Instituto de Fisica Corpuscular, Universitat de Valencia, E-46980 Valencia, Spain
| | - P Golubev
- Department of Physics, Lund University, S-22100 Lund, Sweden
| | - M Lettmann
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - C Lizarazo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - D Mahboub
- Physics Department, University of Hail, PO Box 2440 Hail, Saudi Arabia
| | - H Pai
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - Z Patel
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - N Pietralla
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - P H Regan
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - L G Sarmiento
- Department of Physics, Lund University, S-22100 Lund, Sweden
| | - O Wieland
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - E Wilson
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - B Bruyneel
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - I Burrows
- STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - L Charles
- Institut Pluridisciplinaire Hubert Curien, CNRS-IN2P3, Université de Strasbourg, F-67037 Strasbourg, France
| | - E Clément
- GANIL, CEA/DRF-CNRS/IN2P3, F-14076 Caen Cedex 05, France
| | - F C L Crespi
- INFN, Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
| | - D M Cullen
- School of Physics and Astronomy, Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - P Désesquelles
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse-CSNSM, CNRS/IN2P3 and University Paris-Sud, F-91405 Orsay Campus, France
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - V González
- Department of Electronic Engineering, University of Valencia, E-46100 Burjassot (Valencia), Spain
| | - T Habermann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt, Germany
| | - L Harkness-Brennan
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - H Hess
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - D S Judson
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - W Korten
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Labiche
- STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - A Maj
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31-342 Krakow, Poland
| | - D Mengoni
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - D R Napoli
- INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
| | - A Pullia
- INFN, Sezione di Milano, I-20133 Milano, Italy
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
| | - B Quintana
- Laboratorio de Radiaciones Ionizantes, Universidad de Salamanca, E-37008 Salamanca, Spain
| | - G Rainovski
- Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - M D Salsac
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - E Sanchis
- Department of Electronic Engineering, University of Valencia, E-46100 Burjassot (Valencia), Spain
| | | |
Collapse
|
8
|
Hadyńska-Klȩk K, Napiorkowski PJ, Zielińska M, Srebrny J, Maj A, Azaiez F, Valiente Dobón JJ, Kicińska-Habior M, Nowacki F, Naïdja H, Bounthong B, Rodríguez TR, de Angelis G, Abraham T, Anil Kumar G, Bazzacco D, Bellato M, Bortolato D, Bednarczyk P, Benzoni G, Berti L, Birkenbach B, Bruyneel B, Brambilla S, Camera F, Chavas J, Cederwall B, Charles L, Ciemała M, Cocconi P, Coleman-Smith P, Colombo A, Corsi A, Crespi FCL, Cullen DM, Czermak A, Désesquelles P, Doherty DT, Dulny B, Eberth J, Farnea E, Fornal B, Franchoo S, Gadea A, Giaz A, Gottardo A, Grave X, Grȩbosz J, Görgen A, Gulmini M, Habermann T, Hess H, Isocrate R, Iwanicki J, Jaworski G, Judson DS, Jungclaus A, Karkour N, Kmiecik M, Karpiński D, Kisieliński M, Kondratyev N, Korichi A, Komorowska M, Kowalczyk M, Korten W, Krzysiek M, Lehaut G, Leoni S, Ljungvall J, Lopez-Martens A, Lunardi S, Maron G, Mazurek K, Menegazzo R, Mengoni D, Merchán E, Mȩczyński W, Michelagnoli C, Mierzejewski J, Million B, Myalski S, Napoli DR, Nicolini R, Niikura M, Obertelli A, Özmen SF, Palacz M, Próchniak L, Pullia A, Quintana B, Rampazzo G, Recchia F, Redon N, Reiter P, Rosso D, Rusek K, Sahin E, Salsac MD, Söderström PA, Stefan I, Stézowski O, Styczeń J, Theisen C, Toniolo N, Ur CA, Vandone V, Wadsworth R, Wasilewska B, Wiens A, Wood JL, Wrzosek-Lipska K, Ziȩbliński M. Superdeformed and Triaxial States in ^{42}Ca. Phys Rev Lett 2016; 117:062501. [PMID: 27541463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Indexed: 06/06/2023]
Abstract
Shape parameters of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in ^{42}Ca were determined from E2 matrix elements measured in the first low-energy Coulomb excitation experiment performed with AGATA. The picture of two coexisting structures is well reproduced by new state-of-the-art large-scale shell model and beyond-mean-field calculations. Experimental evidence for superdeformation of the band built on 0_{2}^{+} has been obtained and the role of triaxiality in the A∼40 mass region is discussed. Furthermore, the potential of Coulomb excitation as a tool to study superdeformation has been demonstrated for the first time.
Collapse
Affiliation(s)
- K Hadyńska-Klȩk
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
- Faculty of Physics, University of Warsaw, PL 00-681 Warsaw, Poland
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - P J Napiorkowski
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - M Zielińska
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
| | - J Srebrny
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - A Maj
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - F Azaiez
- Institut de Physique Nucléaire d'Orsay, F-91400 Orsay, France
| | - J J Valiente Dobón
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | | | - F Nowacki
- Université de Strasbourg, IPHC/CNRS, UMR7178, 23 rue du Loess, F-67037 Strasbourg, France
| | - H Naïdja
- Université de Strasbourg, IPHC/CNRS, UMR7178, 23 rue du Loess, F-67037 Strasbourg, France
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- LPMS, Université Constantine 1, Route Ain-El bey, 25000 Constantine, Algeria
| | - B Bounthong
- Université de Strasbourg, IPHC/CNRS, UMR7178, 23 rue du Loess, F-67037 Strasbourg, France
| | - T R Rodríguez
- Universidad Autónoma de Madrid, Departamento de Física Teórica, E-28049 Cantoblanco, Madrid, Spain
| | - G de Angelis
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - T Abraham
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - G Anil Kumar
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - D Bazzacco
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - M Bellato
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - D Bortolato
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - P Bednarczyk
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - G Benzoni
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
| | - L Berti
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - B Bruyneel
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - S Brambilla
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
| | - F Camera
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - J Chavas
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
| | - B Cederwall
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - L Charles
- Université de Strasbourg, IPHC/CNRS, UMR7178, 23 rue du Loess, F-67037 Strasbourg, France
| | - M Ciemała
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - P Cocconi
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - P Coleman-Smith
- Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - A Colombo
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - A Corsi
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - F C L Crespi
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - D M Cullen
- Schuster Laboratory, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - A Czermak
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - P Désesquelles
- Université Paris-Sud, F-91400 Orsay, France
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM/IN2P3/CNRS), F-91405 Orsay, France
| | - D T Doherty
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
- Department of Physics University of York, Heslington, York YO10 5DD, United Kingdom
| | - B Dulny
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - E Farnea
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - B Fornal
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - S Franchoo
- Institut de Physique Nucléaire d'Orsay, F-91400 Orsay, France
| | - A Gadea
- Instituto de Física Corpuscular IFIC, CSIC-University of Valencia, S-46980 Paterna, Valencia, Spain
| | - A Giaz
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - A Gottardo
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - X Grave
- Institut de Physique Nucléaire d'Orsay, F-91400 Orsay, France
| | - J Grȩbosz
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - A Görgen
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - M Gulmini
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - T Habermann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H Hess
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - R Isocrate
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - J Iwanicki
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - G Jaworski
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - D S Judson
- Oliver Lodge Laboratory, The University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - N Karkour
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM/IN2P3/CNRS), F-91405 Orsay, France
| | - M Kmiecik
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - D Karpiński
- Faculty of Physics, University of Warsaw, PL 00-681 Warsaw, Poland
| | - M Kisieliński
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - N Kondratyev
- Flerov Laboratory of Nuclear Reactions JINR, RU-141980 Dubna, Russia
| | - A Korichi
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM/IN2P3/CNRS), F-91405 Orsay, France
| | - M Komorowska
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
- Faculty of Physics, University of Warsaw, PL 00-681 Warsaw, Poland
| | - M Kowalczyk
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - W Korten
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
| | - M Krzysiek
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - G Lehaut
- Universite Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France
| | - S Leoni
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - J Ljungvall
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM/IN2P3/CNRS), F-91405 Orsay, France
| | - A Lopez-Martens
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM/IN2P3/CNRS), F-91405 Orsay, France
| | - S Lunardi
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - G Maron
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - K Mazurek
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - R Menegazzo
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - D Mengoni
- INFN Sezione di Padova, I-35131 Padova, Italy
| | - E Merchán
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - W Mȩczyński
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - C Michelagnoli
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - J Mierzejewski
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - B Million
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
| | - S Myalski
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - D R Napoli
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - R Nicolini
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
| | - M Niikura
- Institut de Physique Nucléaire d'Orsay, F-91400 Orsay, France
| | - A Obertelli
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
| | - S F Özmen
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - M Palacz
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - L Próchniak
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - A Pullia
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - B Quintana
- Laboratorio de Radiaciones Ionizantes, Departamento de Física Fundamental, Universidad de Salamanca, E-37008 Salamanca,Spain
| | - G Rampazzo
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - F Recchia
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - N Redon
- Universite Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - D Rosso
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - K Rusek
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - E Sahin
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - M-D Salsac
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
| | - P-A Söderström
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - I Stefan
- Institut de Physique Nucléaire d'Orsay, F-91400 Orsay, France
| | - O Stézowski
- Universite Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France
| | - J Styczeń
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - Ch Theisen
- CEA Saclay, IRFU/SPhN, F-91191 Gif-sur-Yvette, France
| | - N Toniolo
- INFN Laboratori Nazionali di Legnaro, Viale dell'Università, 2, I-35020 Legnaro, Italy
| | - C A Ur
- INFN Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - V Vandone
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN Sezione di Milano, I-20133 Milano, Italy
| | - R Wadsworth
- Department of Physics University of York, Heslington, York YO10 5DD, United Kingdom
| | - B Wasilewska
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| | - A Wiens
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - J L Wood
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA
| | - K Wrzosek-Lipska
- Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, PL 02-093 Warsaw, Poland
| | - M Ziȩbliński
- Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Kraków, Poland
| |
Collapse
|
9
|
Cullen DM. A dipole band above the Iπ= 31/2 −isomeric state in 189Pb. EPJ Web Conf 2016. [DOI: 10.1051/epjconf/201612302001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
10
|
Chen L, Walker PM, Geissel H, Litvinov YA, Beckert K, Beller P, Bosch F, Boutin D, Caceres L, Carroll JJ, Cullen DM, Cullen IJ, Franzke B, Gerl J, Górska M, Jones GA, Kishada A, Knöbel R, Kozhuharov C, Kurcewicz J, Litvinov SA, Liu Z, Mandal S, Montes F, Münzenberg G, Nolden F, Ohtsubo T, Patyk Z, Plaß WR, Podolyák Z, Rigby S, Saito N, Saito T, Scheidenberger C, Simpson EC, Shindo M, Steck M, Sun B, Williams SJ, Weick H, Winkler M, Wollersheim HJ, Yamaguchi T. Direct observation of long-lived isomers in 212Bi. Phys Rev Lett 2013; 110:122502. [PMID: 25166798 DOI: 10.1103/physrevlett.110.122502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Indexed: 06/03/2023]
Abstract
Long-lived isomers in (212)Bi have been studied following (238)U projectile fragmentation at 670 MeV per nucleon. The fragmentation products were injected as highly charged ions into a storage ring, giving access to masses and half-lives. While the excitation energy of the first isomer of (212)Bi was confirmed, the second isomer was observed at 1478(30) keV, in contrast to the previously accepted value of >1910 keV. It was also found to have an extended Lorentz-corrected in-ring half-life >30 min, compared to 7.0(3) min for the neutral atom. Both the energy and half-life differences can be understood as being due a substantial, though previously unrecognized, internal decay branch for neutral atoms. Earlier shell-model calculations are now found to give good agreement with the isomer excitation energy. Furthermore, these and new calculations predict the existence of states at slightly higher energy that could facilitate isomer deexcitation studies.
Collapse
Affiliation(s)
- L Chen
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany and Cyclotron Institute, Texas A & M University, Texas 77843, USA
| | - P M Walker
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Beckert
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - P Beller
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Bosch
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - D Boutin
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - L Caceres
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - J J Carroll
- US Army Research Laboratory, Adelphi, Maryland 20783, USA
| | - D M Cullen
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - I J Cullen
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - B Franzke
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - J Gerl
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - M Górska
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - G A Jones
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - A Kishada
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - C Kozhuharov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - J Kurcewicz
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - S A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - Z Liu
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom and School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - S Mandal
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Montes
- Michigan State University, East Lansing, Michigan 48824, USA
| | - G Münzenberg
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - F Nolden
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - T Ohtsubo
- Department of Physics, Niigata University, Niigata 950-2181, Japan
| | - Z Patyk
- National Centre for Nuclear Research, Hoa 69, 00-681 Warszawa, Poland
| | - W R Plaß
- II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - S Rigby
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | - N Saito
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - T Saito
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany and II Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany
| | - E C Simpson
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - M Shindo
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
| | - M Steck
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - B Sun
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - S J Williams
- Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - H-J Wollersheim
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - T Yamaguchi
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| |
Collapse
|
11
|
Davies PDO, Cullen DM. P171 The development of a UK National MDRTB service. Thorax 2010. [DOI: 10.1136/thx.2010.151043.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
12
|
Reed MW, Cullen IJ, Walker PM, Litvinov YA, Blaum K, Bosch F, Brandau C, Carroll JJ, Cullen DM, Deo AY, Detwiller B, Dimopoulou C, Dracoulis GD, Farinon F, Geissel H, Haettner E, Heil M, Kempley RS, Knöbel R, Kozhuharov C, Kurcewicz J, Kuzminchuk N, Litvinov S, Liu Z, Mao R, Nociforo C, Nolden F, Plass WR, Prochazka A, Scheidenberger C, Steck M, Stöhlker T, Sun B, Swan TPD, Trees G, Weick H, Winckler N, Winkler M, Woods PJ, Yamaguchi T. Discovery of highly excited long-lived isomers in neutron-rich hafnium and tantalum isotopes through direct mass measurements. Phys Rev Lett 2010; 105:172501. [PMID: 21231037 DOI: 10.1103/physrevlett.105.172501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Indexed: 05/30/2023]
Abstract
A study of cooled ¹⁹⁷Au projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides ¹⁸³(,)¹⁸⁴(,)¹⁸⁶Hf and ¹⁸⁶(,)¹⁸⁷Ta. The results support the prediction of a strongly favored isomer region near neutron number 116.
Collapse
Affiliation(s)
- M W Reed
- Department of Physics, University of Surrey, Guildford, United Kingdom.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Wilson AN, Korichi A, Siem S, Astier A, Bazzacco D, Bednarczyk P, Bergström MH, Chmel S, Cullen DM, Davidson PM, Görgen A, Hannachi F, Hübel H, Kintz N, Lauritsen T, Lopez-Martens A, Lunardi S, Naguleswaran S, Nyakó BM, Rejmund M, Schönwasser G, Schück C, Sharpey-Schafer JF, Timar J, Wadsworth R, Libert J. Two-particle separation energy trends in the superdeformed well. Phys Rev Lett 2010; 104:162501. [PMID: 20482043 DOI: 10.1103/physrevlett.104.162501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Indexed: 05/29/2023]
Abstract
A measurement of the energy and spin of superdeformed states in 190Hg, obtained through the observation of transitions directly linking superdeformed and normal states, expands the number of isotopes in which binding energies at superdeformation are known. Comparison with neighboring nuclei shows that two-proton separation energies are higher in the superdeformed state than in the normal state, despite the lower Coulomb barrier and lower total binding energy. This unexpected result provides a critical test for nuclear models.
Collapse
Affiliation(s)
- A N Wilson
- Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 Australia.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Chen L, Litvinov YA, Plass WR, Beckert K, Beller P, Bosch F, Boutin D, Caceres L, Cakirli RB, Carroll JJ, Casten RF, Chakrawarthy RS, Cullen DM, Cullen IJ, Franzke B, Geissel H, Gerl J, Górska M, Jones GA, Kishada A, Knöbel R, Kozhuharov C, Litvinov SA, Liu Z, Mandal S, Montes F, Münzenberg G, Nolden F, Ohtsubo T, Patyk Z, Podolyák Z, Propri R, Rigby S, Saito N, Saito T, Scheidenberger C, Shindo M, Steck M, Ugorowski P, Walker PM, Williams S, Weick H, Winkler M, Wollersheim HJ, Yamaguchi T. Schottky mass measurement of the 208Hg isotope: implication for the proton-neutron interaction strength around doubly magic 208Pb. Phys Rev Lett 2009; 102:122503. [PMID: 19392270 DOI: 10.1103/physrevlett.102.122503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Indexed: 05/27/2023]
Abstract
Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the mass value for the 208Hg (Z=80, N=128) isotope. The mass excess value of ME=-13 265(31) keV has been obtained, which has been used to determine the proton-neutron interaction strength in 210Pb, as a double difference of atomic masses. The results show a dramatic variation of the strength for lead isotopes when crossing the N=126 neutron shell closure, thus confirming the empirical predictions that this interaction strength is sensitive to the overlap of the wave functions of the last valence neutrons and protons.
Collapse
Affiliation(s)
- L Chen
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Cullen DM, Boyle JJW, Silbert PL, Singer BJ, Singer KP. Botulinum toxin injection to facilitate rehabilitation of muscle imbalance syndromes in sports medicine. Disabil Rehabil 2008; 29:1832-9. [PMID: 18033608 DOI: 10.1080/09638280701568627] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Intramuscular injection of Botulinum toxin to produce reduction of focal muscle overactivity, and localized muscle spasm, has been utilized therapeutically for almost two decades. Muscle overactivity in neurologically normal muscle, where an imbalance exists between a relatively overactive muscle and its less active synergist or antagonist, can inhibit control of the antagonist producing a functional muscle imbalance. This brief review provides an overview of the role of muscle imbalance in sports-related pain and dysfunction, and outlines the potential for intramuscular injection of Botulinum toxin to be used as an adjunct to specific muscle re-education and functional rehabilitation in this patient group. A comprehensive understanding of normal movement and the requirements of the sporting activity are essential to allow accurate diagnosis of abnormal motor patterns and to re-educate more appropriate movement strategies. Therapeutic management of co-impairments may include stretching of tight soft tissues, specific re-education aimed at isolation of the non-dominant weak muscles and improvement in their activation, 'unlearning' of faulty motor patterns, and eventual progression onto functional exercises to anticipate gradual return to sporting activity. Intramuscular injection of Botulinum toxin, in carefully selected cases, provides short term reduction of focal muscle overactivity, and may facilitate activation of relatively 'inhibited' muscles and assist the restoration of more appropriate motor patterns.
Collapse
Affiliation(s)
- D M Cullen
- Excel Sports Group, Osborne Park, Western Australia, Australia.
| | | | | | | | | |
Collapse
|
16
|
Kuruvilla SJ, Fox SD, Cullen DM, Akhter MP. Site specific bone adaptation response to mechanical loading. J Musculoskelet Neuronal Interact 2008; 8:71-78. [PMID: 18398268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Over 25 million Americans suffer from osteoporosis. Bone size and strength depends both upon the level of adaptation due to physical activity (applied load), and genetics. We hypothesized that bone adaptation to loads differs among mice breeds and bone sites. Forty-five adult female mice from three inbred strains (C57BL/6 [B6], C3H/HeJ [C3], and DBA/2J [D2]) were loaded at the right tibia and ulna in vivo with non-invasive loading devices. Each loading session consisted of 99 cycles at a force range that induced approximately 2000 microstrain (microepsilon) at the mid-shaft of the tibia (2.5 to 3.5 N force) and ulna (1.5 to 2 N force). The right and left ulnae and tibiae were collected and processed using protocols for histological undecalcified cortical bone slides. Standard histomorphometry techniques were used to quantify new bone formation. The histomorphometric variables include percentage mineralizing surface (%MS), mineral apposition rate (MAR), and bone formation rate (BFR). Net loading response [right-left limb] was compared between different breeds at tibial and ulnar sites using two-way ANOVA with repeated measures (p<0.05). Significant site differences in bone adaptation response were present within each breed (p<0.005). In all the three breeds, the tibiae showed greater percentage MS, MAR and BFR than the ulna at similar in vivo load or mechanical stimulus (strain). These data suggest that the bone formation due to loading is greater in the tibiae than the ulnae. Although, no significant breed-related differences were found in response to loading, the data show greater trends in tibial bone response in B6 mice as compared to D2 and C3 mice. Our data indicate that there are site-specific skeletal differences in bone adaptation response to similar mechanical stimulus.
Collapse
|
17
|
Bradley JD, Cleverly DG, Burns AM, Helm NB, Schmid MJ, Marx DB, Cullen DM, Reinhardt RA. Cyclooxygenase-2 inhibitor reduces simvastatin-induced bone morphogenetic protein-2 and bone formation in vivo. J Periodontal Res 2007; 42:267-73. [PMID: 17451547 PMCID: PMC2014720 DOI: 10.1111/j.1600-0765.2006.00943.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE Simvastatin, a cholesterol-lowering drug, also stimulates oral bone growth when applied topically, without systemic side-effects. However, the mechanisms involved in vivo are not known. We hypothesized that bone morphogenetic protein-2, nitric oxide synthase, and cyclooxygenase-2 are involved, based on prior in vitro evidence. MATERIAL AND METHODS A rat bilateral mandible model, where 0.5 mg of simvastatin in methylcellulose gel was placed on one side and gel alone on the other, was used to quantify nitric oxide, cyclooxygenase-2 and bone morphogenetic protein-2 (via tissue extraction, enzyme activity or immunoassay), and to analyze the bone formation rate (via undecalcified histomorphometry). Cyclooxygenase-2 and nitric oxide synthase inhibitors (NS-398 and L-NAME, respectively) were administered intraperitoneally. RESULTS Simvastatin was found to stimulate local bone morphogenetic protein-2, nitric oxide and the regional bone formation rate (p < 0.05), whereas NS-398 inhibited bone morphogenetic protein-2 and reduced the bone formation rate (p < 0.05). CONCLUSION These data suggest an association between simvastatin-induced bone morphogenetic protein-2 and bone formation in the mandibular microenvironment, and the negative effect of cyclooxygenase-2 inhibitors on bone growth.
Collapse
Affiliation(s)
- J D Bradley
- Department of Surgical Specialties and Oral Biology, University of Nebraska Medical Center College of Dentistry, Lincoln, NE 68583-0740, USA
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Abstract
Both diagnostic ultrasound and magnetic resonance imaging (MRI) are used for investigation of the presence and severity of rotator cuff lesions. There is no consensus as to which is the more accurate and cost-effective study. We sought to examine the sensitivity of ultrasound, when used by one experienced radiologist with modern equipment. We compared the ultrasound and surgical results obtained from 68 patients. Ultrasound showed a sensitivity of 89% and specificity of 100% (Positive Predictive Value 100%) for full-thickness tears, and a sensitivity of 79% and specificity of 94% (Positive Predictive Value 87%) for partial-thickness tears. We found that shoulder ultrasound, in the hands of an experienced radiologist with the use of modern high-resolution equipment, is highly sensitive in differentiating complete tears and partial-thickness tears. Our results are similar to the best published results for MRI and given that ultrasound is significantly cheaper and more available, ultrasound by an experienced radiologist should be considered as a primary diagnostic tool for imaging the rotator cuff.
Collapse
Affiliation(s)
- D M Cullen
- Perth Orthopaedic and Sports Medicine Centre, Perth, Western Australia, Australia.
| | | | | |
Collapse
|
19
|
Abstract
Among the four prostaglandin E receptor subtypes, EP(4) has been implicated as an important regulator of both bone formation and bone resorption; however, the integrated activities of this receptor on bone biomechanical properties have not been examined previously. This study compared the bone biomechanical properties of EP(4) knockout (KO) transgenic mice to strain-matched wild-type (WT) controls. We examined two groups of adult female mice: WT (n = 12) and EP(4) KO (n = 12). Femurs were tested in three-point bending and the lumbar-4 (L4) vertebral body by compression. Distal femur and vertebral body trabecular bone architecture were quantified using micro-computed tomography. Biomechanical structural parameters (ultimate/yield load, stiffness) were measured and apparent material parameters (ultimate/yield stress, modulus) calculated. Body weights and bone sizes were not different between EP(4) KO and WT mice (P > 0.05, Student's t-test). EP(4) KO mice exhibited reduced structural (ultimate/yield load) and apparent material (ultimate/yield stress) strength in the femoral shaft and vertebral body compared to WT (P < 0.05). Vertebral body stiffness and femoral neck ultimate load (structural strength) were marginally lower in EP(4) KO than that in WT mice (P < 0.1). In addition, EP(4) KO mice have smaller distal femur and vertebral bone volume to total volume (BV/TV) trabecular thickness than WT mice (P < 0.05). These results suggest that the prostaglandin receptor EP(4) has an important role in determining biomechanical competence in the mouse skeleton. Despite similar bone size, the absence of an EP(4) receptor may have removed a necessary link for bone adaptation pathways, which resulted in relatively weaker bone properties.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, Omaha, NE, USA.
| | | | | |
Collapse
|
20
|
Akhter MP, Wells DJ, Short SJ, Cullen DM, Johnson ML, Haynatzki GR, Babij P, Allen KM, Yaworsky PJ, Bex F, Recker RR. Bone biomechanical properties in LRP5 mutant mice. Bone 2004; 35:162-9. [PMID: 15207752 DOI: 10.1016/j.bone.2004.02.018] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2003] [Revised: 02/12/2004] [Accepted: 02/20/2004] [Indexed: 10/26/2022]
Abstract
The mutation responsible for the high bone mass (HBM) phenotype has been postulated to act through the adaptive response of bone to mechanical load resulting in denser and stronger skeletons in humans and animals. The bone phenotype of members of a HBM family is characterized by normally shaped bones that are exceptionally dense, particularly at load bearing sites [Cancer Res. 59 (1999) 1572]. The high bone mass (HBM) mutation was identified as a glycine to valine substitution at amino acid residue 171 in the gene coding for low-density lipoprotein receptor-related protein 5 (LRP5) [Bone Miner. Res. 16(4) (2001) 758]. Thus, efforts have focused on the examination of the role of LRP5 and the G171V mutation in bone mechanotransduction responses [J. Bone Miner. Res 18 (2002) 960]. Transgenic mice expressing the human G171V mutation have been shown to have skeletal phenotypes remarkably similar to those seen in affected individuals. In this study, we have identified differences in biomechanical (structural and apparent material) properties, bone mass/ash, and bone stiffness of cortical and cancellous bone driven by the G171V mutation in LRP5. As in humans, the LRP5 G171V plays an important role in regulating bone structural phenotypes in mice. These bone phenotypes include greater structural and apparent material properties in HBM HET as compared to non-transgenic littermates (NTG) mice. Body size and weight in HBM HET were similar to that in NTG control mice. However, the LRP5 G171V mutation in HET mice results in a skeleton that has greater structural (femoral shaft, femoral neck, tibiae, vertebral body) and apparent material (vertebral body) strength, percent bone ash weight (ulnae), and tibial stiffness. Despite similar body weight to NTG mice, the denser and stiffer bones in G171V mice may represent greater bone formation sensitivity to normal mechanical stimuli resulting in an overadaptation of skeleton to weight-related forces.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, Omaha, NE 68131, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Akhter MP, Otero JK, Iwaniec UT, Cullen DM, Haynatzki GR, Recker RR. Differences in vertebral structure and strength of inbred female mouse strains. J Musculoskelet Neuronal Interact 2004; 4:33-40. [PMID: 15615076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
This study assessed mouse strain-related differences in vertebral biomechanics and histomorphometry in inbred mice strains shown to differ in bone mineral content (BMC) and areal density (BMD) (as measured by pDEXA). Lumbar vertebrae L3 to L5 were collected from three mice strains (C3H/HeJ[C3], C57BL/6J[B6], and DBA/2J[D2], n=12/strain, 4-month-old female, 22.2 +/- 0.3g). BMC and BMD were measured in L3 and L4 using peripheral dual energy x-ray absorptiometry. The L4 vertebral body was then mechanically tested in compression to determine structural properties (ultimate/yield load, stiffness) from load-displacement curves and derive apparent material properties (ultimate/yield stress, and modulus of elasticity). L5 was processed for histomorphometric evaluation. Vertebral BMC and BMD were greater in C3 than in B6 and D2 mice. Vertebral trabecular/cancellous bone volume was smaller in C3 than in D2 and B6 mice. Trabecular bone formation rates were greater in D2 than in B6 and C3 mice. Osteoid surface was smaller in C3 mice than in B6 and D2 mice. Differences in osteoclast and mineralizing surfaces were not detected among the three mouse strains. In addition, there were no significant differences in biomechanical properties between the three strains. Despite the greatest BMC and areal BMD in C3 mice, the lack of strain-related differences in vertebral body strength data suggests that the biomechanical properties may be affected by the bone distribution and/or complex combination of cortical and cancellous bone at this site.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, Omaha, NE 68131, USA.
| | | | | | | | | | | |
Collapse
|
22
|
Pattison LK, Cullen DM, Smith JF, Fletcher AM, Walker PM, El-Masri HM, Podolyák Z, Wood RJ, Scholey C, Wheldon C, Mukherjee G, Balabanski D, Djongolov M, Dalsgaard T, Thisgaard H, Sletten G, Kondev F, Jenkins D, Lane GJ, Lee IY, Macchiavelli AO, Frauendorf S, Almehed D. Multiphonon vibrations at high angular momentum in 182 Os. Phys Rev Lett 2003; 91:182501. [PMID: 14611278 DOI: 10.1103/physrevlett.91.182501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2002] [Indexed: 05/24/2023]
Abstract
Evidence is presented for multiphonon excitations based on a high-spin (25 Planck) intrinsic state in the deformed nucleus 182 Os. Angular momentum generation by this mode competes with collective rotation. The experimental data are compared with tilted-axis cranking calculations, supporting the vibrational interpretation. However, the lower experimental energies provide evidence that more complex interactions of states are playing a role.
Collapse
Affiliation(s)
- L K Pattison
- Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Abstract
This study investigated the effects of nicotine on bone mass and biomechanical properties in aged, estrogen-replete (sham-operated) and estrogen-deplete (ovariectomized) female rats. Eight month old, retired breeder, sham-operated and ovariectomized Sprague-Dawley rats were left untreated for 12 weeks to establish cancellous osteopenia in the ovariectomized group. The animals were then administered saline, low dose nicotine (6.0 mg/kg/day) or high dose nicotine (9.0 mg/kg/day) via osmotic minipumps for 12 weeks. Vertebrae and femora were collected at necropsy for determination of bone mass and strength. As expected, ovariectomy had a negative effect on most endpoints evaluated. Vertebral body bone mineral content (BMC) and density (BMD) and the structural (ultimate load and yield load) and material (ultimate stress, yield stress, and flexural modulus of elasticity) strength properties were lower in the OVX rats than in the sham-operated rats. Femoral diaphysis BMC, BMD, ultimate load, and flexural modulus were also lower in the OVX rats than in the sham-operated rats. The nicotine doses administered resulted in serum nicotine levels that averaged 1.5-4.5-fold greater than those observed in heavy smokers. Despite the high doses used, nicotine had no effect on vertebral BMC, BMD, or any of the structural and material strength properties in either the OVX or the Sham rats. In addition, nicotine had no effect on femoral diaphysis BMC, BMD, ultimate load, stiffness, ultimate stress, or flexural modulus. Femoral yield load and stress were lower in low dose nicotine-treated rats than in vehicle-treated rats. However, differences were not detected between the high dose nicotine- and vehicle-treated rats for either femoral yield load or stress. The results suggest that tobacco agents other than nicotine are responsible for the decreased bone density and increased fracture risk as observed in smokers.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, 610 N, 30th Street, Omaha, NE 68131, USA.
| | | | | | | | | | | |
Collapse
|
24
|
Iwaniec UT, Haynatzki GR, Fung YK, Akhter MP, Haven MC, Cullen DM. Effects of nicotine on bone and calciotropic hormones in aged ovariectomized rats. J Musculoskelet Neuronal Interact 2002; 2:469-78. [PMID: 15758416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The objective of this investigation was to assess the effects of chronic nicotine administration on bone status and serum calcium and calciotropic hormone levels in aged, estrogen-replete (intact, sham-operated) and estrogen-deplete (ovariectomized) female rats. Eight-month-old sham-operated (sham) and ovariectomized (ovx) retired breeder rats were maintained untreated for 3 months to allow for the development of osteopenia in the ovx group. The animals were then administered either saline, low dose nicotine (6.0 mg/kg/day), or high dose nicotine (9.0 mg/kg/day) via osmotic minipumps for 3 months. Blood was drawn at necropsy for determination of serum nicotine, cotinine, Ca, PTH, 25(OH)D, and 1,25(OH)(2)D. Right tibiae were collected and processed undecalcified for cancellous and cortical bone histomorphometry. Histomorphometric endpoints evaluated at the proximal tibial metaphysis included cancellous bone volume (BV/TV), osteoclast surface (Oc.S), osteoid surface (OS), mineralizing surface (MS), mineral apposition rate (MAR), and bone formation rate (BFR). Histomorphometric endpoints evaluated at the tibial diaphysis included cortical area (Ct.Ar), marrow area (Ma.Ar), and periosteal and endocortical MS, MAR, and BFR. Ovariectomy resulted in lower cancellous BV/TV and Ct.Ar and higher cancellous, endocortical, and periosteal MS and BFR. The presence of nicotine in serum confirmed successful delivery of the drug via osmotic minipumps. Administration of nicotine at the high dose resulted in lower serum 25(OH)D levels but differences in serum Ca or PTH were not detected with either nicotine treatment. Differences with nicotine treatment were also not detected for Oc.S at the proximal tibia. While treatment with nicotine at the high dose resulted in higher MS and BFR, in both sham and ovx rats, there were no differences due to nicotine treatment in cancellous BV/TV. Marrow area was greater in rats treated with nicotine than in rats treated with vehicle. However, differences with nicotine treatment were not detected in Ct.Ar in either intact or ovx rats. Overall, these findings indicate that steady state nicotine exposure does not alter bone mass in intact or ovx rats but may have detrimental effects on body storage of vitamin D.
Collapse
Affiliation(s)
- U T Iwaniec
- Osteoporosis Research Center, Creighton University, Omaha, Nebraska, USA.
| | | | | | | | | | | |
Collapse
|
25
|
Sorlin O, Leenhardt S, Donzaud C, Duprat J, Azaiez F, Nowacki F, Grawe H, Dombrádi Z, Amorini F, Astier A, Baiborodin D, Belleguic M, Borcea C, Bourgeois C, Cullen DM, Dlouhy Z, Dragulescu E, Górska M, Grévy S, Guillemaud-Mueller D, Hagemann G, Herskind B, Kiener J, Lemmon R, Lewitowicz M, Lukyanov SM, Mayet P, de Oliveira Santos F, Pantalica D, Penionzhkevich YE, Pougheon F, Poves A, Redon N, Saint-Laurent MG, Scarpaci JA, Sletten G, Stanoiu M, Tarasov O, Theisen C. (68)(28)Ni(40): Magicity versus superfluidity. Phys Rev Lett 2002; 88:092501. [PMID: 11863997 DOI: 10.1103/physrevlett.88.092501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2000] [Revised: 11/15/2001] [Indexed: 05/23/2023]
Abstract
The neutron-rich (66,68)Ni have been produced at GANIL via interactions of a 65.9A MeV 70Zn beam with a 58Ni target. Their reduced transition probability B(E2;0(+)(1)-->2+) has been measured for the first time by Coulomb excitation in a (208)Pb target at intermediate energy. The B(E2) value for (68)Ni(40) is unexpectedly small. An analysis in terms of large scale shell model calculations stresses the importance of proton core excitations to reproduce the B(E2) values and indicates the erosion of the N = 40 harmonic-oscillator subshell by neutron-pair scattering.
Collapse
Affiliation(s)
- O Sorlin
- Institut de Physique Nucléaire, IN2P3-CNRS, F-91406 Orsay Cedex, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Akhter MP, Cullen DM, Recker RR. Bone adaptation response to sham and bending stimuli in mice. J Clin Densitom 2002; 5:207-16. [PMID: 12110765 DOI: 10.1385/jcd:5:2:207] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2001] [Revised: 10/03/2001] [Accepted: 10/05/2001] [Indexed: 11/11/2022]
Abstract
This study presents inbred-strain-related differences in tibial bone adaptation response to low-force loading in four-point bending and sham (pad pressure) arrangements in mice. Our previous work in mice has shown that at relatively high but equal bending forces (9 N or a bending moment of 16.88 N-mm), C57BL/6J mice respond with significantly greater bone formation than C3H/HeJ mice. Because of high tibial strains, the majority of the bone response in our previous study was woven bone. In this, study, we reduced the loading forces to 5 N or a bending moment of 9.38 N-mm (to decrease the woven-bone formation response) and investigated inbred-strain-related bone adaptation differences resulting from bending and sham loading (reported here for the first time in C57BL/6J) in these mice. Twenty-four female mice within each inbred mouse strain (C3H/HeJ [C3H] and C57BL/6J [B6]) were randomly divided into the two loading groups (12 per group sham and bending, total of 48 mice). All of the external loading was done for 36 cycles at 2 Hz, 3 d/wk for 3 wk. The bone adaptation response at lower forces exhibited a pattern similar to that seen for the higher forces in the previous study, suggesting that the patterns of bone adaptation were inbred strain related and independent of bending force magnitude. The bending-related periosteal mineral apposition surface (pMS) and mineral apposition rate (MAR) were respectively 40% and 45% greater in B6 than in C3H. The cortical bone adaptation response to bending was greater when compared to sham or pad pressure for each inbred strain of mice, suggesting that the majority of the bone adaptation response was the result of bending stimulus and not local pressure from pad contact. In addition, regardless of loading arrangement (sham or bending), the bone adaptation response in C57BL/6J mice was greater than C3H/HeJ.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, Omaha, NE 68131, USA
| | | | | |
Collapse
|
27
|
Abstract
Mechanical loading stimulates bone formation and regulates bone size, shape, and strength. It is recognized that strain magnitude, strain rate, and frequency are variables that explain bone stimulation. Early loading studies have shown that a low number (36) of cycles/day (cyc) induced maximal bone formation when strains were high (2,000 microepsilon) (Rubin CT and Lanyon LE. J Bone Joint Surg Am 66: 397-402, 1984). This study examines whether cycle number directly affects the bone response to loading and whether cycle number for activation of formation varies with load magnitude at low frequency. The adult rat tibiae were loaded in four-point bending at 25 (-800 microepsilon) or 30 N (-1,000 microepsilon) for 0, 40, 120, or 400 cyc at 2 Hz for 3 wk. Differences in periosteal and endocortical formation were examined by histomorphometry. Loading did not stimulate bone formation at 40 cyc. Compared with control tibiae, tibiae loaded at -800 microepsilon showed 2.8-fold greater periosteal bone formation rate at 400 cyc but no differences in endocortical formation. Tibiae loaded at -1,000 microepsilon and 120 or 400 cyc had 8- to 10-fold greater periosteal formation rate, 2- to 3-fold greater formation surface, and 1-fold greater endocortical formation surface than control. As applied load or strain magnitude decreased, the number of cyc required for activation of formation increased. We conclude that, at constant frequency, the number of cyc required to activate formation is dependent on strain and that, as number of cyc increases, the bone response increases.
Collapse
Affiliation(s)
- D M Cullen
- Osteoporosis Research Center, Creighton University, Omaha, Nebraska 68131, USA.
| | | | | |
Collapse
|
28
|
Iwaniec UT, Samnegård E, Cullen DM, Kimmel DB. Maintenance of cancellous bone in ovariectomized, human parathyroid hormone [hPTH(1-84)]-treated rats by estrogen, risedronate, or reduced hPTH. Bone 2001; 29:352-60. [PMID: 11595618 DOI: 10.1016/s8756-3282(01)00582-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This study compares effects of maintenance doses of human parathyroid hormone [hPTH(1-84)], 17beta-estradiol (E2), and risedronate on distal femur bone mineral density and proximal tibia cancellous bone histomorphometry in ovariectomized (ovx), osteopenic rats previously administered a higher dose of hPTH. Nine groups (n = 8) of 3.5-month-old ovx or intact Sprague-Dawley rats were left untreated for 11 weeks to allow for the development of cancellous osteopenia in the ovx groups. Next, the ovx rats received subcutaneous injections of hPTH (75 microg/kg per day, three times per week) or vehicle for 12 weeks. Treatments were then changed to E2 (10 microg/kg per day, two times per week), risedronate (Ris; 3 microg/kg per day, three times per week), low-dose hPTH(1-84) (LowPTH; 25 microg/kg per day, three times per week), or vehicle, and administered for 36 weeks. The intact control group remained untreated for the duration of study. Femora and tibiae were collected at weeks -11 (baseline); 0 (ovx effect); 12 (hPTH effect), and 24, 36, and 48 (maintenance effects). Endpoints evaluated included distal femur bone mineral density (BMD) and proximal tibia cancellous bone volume (BV/TV), osteoclast surface (Oc.S), mineralizing surface (MS), mineral apposition rate (MAR), and bone formation rate (BFR). Ovariectomy had a negative effect on distal femur BMD and proximal tibia BV/TV. Treatment of ovx rats with hPTH for 12 weeks resulted in higher BMD in comparison to intact controls, and higher cancellous BV/TV in comparison to ovx controls. Discontinuation of hPTH resulted in loss of gained BMD within 24 weeks and loss of gained BV/TV within 12 weeks. Treatment of ovx rats with hPTH for 12 weeks followed by E2 treatment left BMD and BV/TV similar to vehicle-treated ovx rats by week 48 (36 weeks after commencement of the E2 maintenance treatment). Maintenance treatment with risedronate resulted in BMD and BV/TV similar to that of intact controls. Maintenance treatment with low-dose hPTH resulted in greater BMD and similar BV/TV in comparison to intact controls. MS and BFR were highest after low-dose hPTH administration. MS and BFR were lowest after E2 or risedronate, whereas Oc.S was lowest after risedronate administration. Thus, in osteopenic rats, the increment in distal femur BMD and proximal tibia BV/TV gained by 12 weeks of hPTH treatment was lost within 24 and 12 weeks of treatment termination, respectively. Low-dose hPTH maintained BMD and BV/TV after hPTH treatment by stimulating bone formation, whereas risedronate maintained BMD and BV/TV by reducing bone resorption. E2 in a maintenance dose failed to maintain BMD and BV/TV after withdrawal of hPTH treatment.
Collapse
Affiliation(s)
- U T Iwaniec
- Osteoporosis Research Center, Creighton University, Omaha, NE, USA.
| | | | | | | |
Collapse
|
29
|
Abstract
Prostaglandins play an important role in regulating the bone adaptation response to mechanical stimuli. Prostaglandin E2 (PGE2) is an effective modulator of bone metabolism. Administration of PGE2 to rodents results in increased cancellous and cortical bone mass translating into enhanced mechanical strength. The PGE2 influence on bone is mediated through four well-characterized receptors (EP1, EP2, EP3, and EP4). Although the PGE2 pathways and mechanisms of action on cells involved in bone adaptation are still under investigation, it is now known that each receptor plays a unique role in regulating PGE2-related bone cell function. The EP1 subtype is coupled with Ca2+ mobilization. The EP2 subtype stimulates cyclic adenosine monophosphate (cAMP) formation. cAMP in turn is responsible for the early cellular signal that stimulates bone formation. This study compared physical and biomechanical properties of bone in EP1 and EP2 knockout mice to their corresponding wild-type controls. Ash weight was measured in the ulnae, and femurs and vertebral bodies were tested in three-point bending and compression, respectively. The results suggest: (a) EP1 receptors have a minimal influence on skeletal strength or size in mice; and (b) EP2 receptors have a major influence on the biomechanical properties of bone in mice. The absence of EP2 receptors resulted in weak bone biomechanical strength properties in the EP2 knockout model as compared with the corresponding wild-type control mice.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, Omaha, NE 68131, USA
| | | | | | | |
Collapse
|
30
|
Iwaniec UT, Fung YK, Akhter MP, Haven MC, Nespor S, Haynatzki GR, Cullen DM. Effects of nicotine on bone mass, turnover, and strength in adult female rats. Calcif Tissue Int 2001; 68:358-64. [PMID: 11685424 DOI: 10.1007/s00223-001-0011-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2000] [Accepted: 01/31/2001] [Indexed: 10/26/2022]
Abstract
This study investigated the effects of nicotine, the chemical responsible for tobacco addiction, on bone and on serum mineral and calcitropic hormone levels in adult, female rats to help resolve a current controversy regarding the impact of nicotine on bone health. Seven-month-old rats received either saline (n = 12), low-dose nicotine (4.5 mg/kg/day, n = 2), or high-dose nicotine (6.0 mg/kg/day, n = 12) administered subcutaneously via osmotic minipumps for 3 months. Blood, femora, tibiae, and lumbar vertebrae (3-5) were collected at necropsy for determination of serum mineral and hormonal concentrations, bone density (femora and vertebrae), bone turnover (tibiae), and bone strength (femora). The presence of nicotine in serum (111 +/- 7 and 137 +/- 10 ng/ml for the low- and high-dose nicotine groups, respectively) confirmed successful delivery of the drug via osmotic minipumps. Nicotine-induced treatment differences were not detected in serum calcium, 25-hydroxyvitamin D, and 1,25-dihydroxyvitamin D. However, serum phosphorus and parathyroid hormone (PTH) were higher in rats treated with high-dose nicotine, and serum calcitonin was lower in rats treated with both high- and low-dose nicotine than in control rats. Nicotine treatment had no effect on tibial cancellous or cortical bone turnover or femoral bone mineral content (BMC) and density (BMD). Femoral ultimate load and vertebral BMC were lower in rats treated with high-dose nicotine than in control rats. We conclude that nicotine at serum concentrations 2.5-fold greater than the average in smokers has limited detrimental effects on bone in normal, healthy female rats.
Collapse
Affiliation(s)
- U T Iwaniec
- Osteoporosis Research Center, Creighton University, Omaha, Nebraska, 68131, USA
| | | | | | | | | | | | | |
Collapse
|
31
|
Korichi A, Wilson AN, Hannachi F, Lopez-Martens A, Rejmund M, Schück C, Vieu C, Chmel G, Görgen A, Hübel H, Rossbach D, Schönwasser S, Bergström M, Nyakó BM, Timár J, Bazzacco D, Lunardi S, Rossi-Alvarez C, Bednarczyk P, Kintz N, Naguleswaran S, Astier A, Cullen DM, Sharpey-Schafer JF, Lauritsen T, Wadsworth R. Linear polarization measurement of interband transitions in superdeformed 190hg: model-independent evidence for octupole vibrational structures. Phys Rev Lett 2001; 86:2746-2749. [PMID: 11290029 DOI: 10.1103/physrevlett.86.2746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2000] [Indexed: 05/23/2023]
Abstract
The linear polarization of gamma rays between excited and yrast superdeformed (SD) states in 190Hg was measured using the four-element CLOVER detectors of the EUROBALL IV gamma-ray spectrometer. This measurement shows in a model-independent way that the interband transitions which compete with the highly collective in-band quadrupole transitions are largely enhanced electric dipoles. Not only do these results represent the first measurement of the multipolarity of transitions between different SD states, but they also provide strong evidence for the interpretation of the structures in the SD minimum of the A approximately 190 region in terms of octupole excitations.
Collapse
Affiliation(s)
- A Korichi
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, IN2P3-CNRS et université Paris XI, F-91405 Orsay cedex, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Abstract
The purpose of this cross-sectional study was to evaluate the effects of human parathyroid hormone(1-84) (hPTH) followed by maintenance treatment with 17beta-estradiol (E(2)), risedronate (Ris), or a reduced dose of hPTH (LowPTH) on cortical bone in the ovariectomized (ovx) rat. Eight groups of ovx and one group of intact female rats (3.5 months) were left untreated for 11 weeks. For the following 12 weeks, four groups received subcutaneous injections of hPTH (75 microg/kg per day on 3 days/week) and four groups received vehicle. Treatments were then changed to E(2) (10 microg/kg per day on 2 days/week), Ris (3 microg/kg per day on 3 days/week), LowPTH (25 microg/kg per day on 3 days/week), or vehicle. Bone tissue was collected at weeks -11 (baseline), 0 (ovx effect), 12 (hPTH effect), 24, 36, and 48 (maintenance effect). Bone mineral density (BMD) and bone mineral content (BMC) of the diaphyseal femur and total cross-sectional area (Tt.Ar), marrow area (Ma.Ar), cortical area (Ct.Ar), and periosteal and endocortical bone formation of the tibia were measured. Ovariectomy resulted in lower BMD (weeks 0-48), unaffected BMC, and greater Tt.Ar (weeks 12 and 36), Ma.Ar (week 48), and Ct.Ar (weeks 0 and 12) compared with intact rats. Endocortical and periosteal bone formation were greater in the ovx than in the intact rats up to 23 weeks postovariectomy. Treatment of ovx rats with hPTH for 12 weeks resulted in greater cortical BMD, BMC, and endocortical bone formation than in intact or ovx controls. In ovx rats pretreated with hPTH and then treated with Ris for 36 weeks, BMD and BMC were greater and Ma.Ar was smaller than in ovx controls. In ovx rats pretreated with hPTH and then treated with LowPTH, BMD, BMC, Ct.Ar, and endocortical bone formation were greater and Ma.Ar was smaller than in ovx controls. Treatment of hPTH-pretreated rats with E(2) for 36 weeks did not affect cortical BMD, BMC, and Ct.Ar, although periosteal bone formation was lower in the E(2) group compared with the ovx group. Thus, in ovariectomized rats, cortical bone gained by 12 weeks of hPTH treatment was maintained for up to 36 weeks by treatment with risedronate or low-dose hPTH, but not with 17beta-estradiol.
Collapse
Affiliation(s)
- E Samnegård
- Osteoporosis Research Center, Creighton University, Omaha, NE, USA.
| | | | | | | | | |
Collapse
|
33
|
Abstract
Verapamil, a calcium channel blocker, alters the intracellular calcium concentration in bone cells in vitro, while mechanical loading stimulates calcium channels. The purpose of this study was to examine the effect of systemic verapamil treatment on the bone response to in vivo external mechanical loading. Female rats (age 5-6 months) were divided into six groups. Half were verapamil treated (0.75 mg/ml drinking water) for 12 weeks. After 8 weeks of treatment, the right tibia was loaded by a four-point bending device. In one set of verapamil and control groups, the right tibia was loaded at 31.8 +/- 0.2 N (36 cycles, 2 Hz, 3 d/wk) for four weeks. A second set was loaded at 40.1 +/- 0.3 N and the third set remained nonloaded. Tibial cortical bone formation and femur bone mineral density (BMD) were evaluated. With loading, bone formation was similarly elevated in loaded tibia of verapamil and control rats (P < 0.003). However, periosteal bone formation (P < 0.001) in the nonloaded tibia, and femoral diaphysis BMD (P < 0.04) were greater in verapamil rats than in controls. We conclude that verapamil, in the dose given, does not interfere with mechanical loading (30, 40 N) at the loaded site and that the voltage-dependent calcium channels, blocked by verapamil, are not significantly involved in the local bone response to increased strain in female rats. However, verapamil increased bone formation and BMD at nonloaded sites of loaded rats. Previously unknown systemic or regional factors associated with loading may explain the potential mechanisms for this interaction and need further investigation.
Collapse
Affiliation(s)
- E Samnegård
- Department of Orthopaedic Surgery, Karolinska Institute, Huddinge University Hospital, Sweden.
| | | | | | | |
Collapse
|
34
|
Abstract
The purpose of this study was to assess breed-related differences in bone histomorphometry, bone biomechanics, and serum biochemistry in three mouse breeds shown to differ in bone mineral density (BMD) (as measured by DXA) and bone mineral content (BMC). Femurs, tibiae, and sera were collected from 16-week-old C3H/HeJ C3H, C57BL/6J BL6, and DBA/2J DBAmice (n = 12/breed). Data collected included BMC and BMD (femora), histomorphometry of cancellous (distal femur) and cortical bone (diaphyseal tibiae and femora), bone strength (femora), and serum alkaline phosphatase (ALP). Consistent with previous reports, BMC and BMD were higher in C3H than in BL6 or DBA mice. The higher BMD in the C3H breed was associated with greater cancellous bone volume, cortical bone area, periosteal bone formation rate, biomechanical strength, and serum ALP. However, mid-diaphyseal total femoral and tibial cross-sectional area and moment of inertia were greatest in BL6, intermediate in C3H, and lowest in DBA mice. The specific distribution of cortical bone in C3H, BL6, DBA mice represents a difference in adaptive response to similar mechanical loads in these breeds. This difference in adaptive response may be intrinsic to the adaptive mechanism, or may be intrinsic to the bone tissue material properties. In either case, the bone-adaptive response to ordinary mechanical loads in the BL6 mice yields bones of lower mechanical efficiency (less stiffness per unit mass of bone tissue) and does not adapt as well as that of the C3H mice where the final product is a bone with greater resistance to bending under load. We suggest that the size, shape, and BMD of the bone are a result of breed-specific genetically regulated cellular mechanisms. Compared with the C3H mice, the lower BMD in BL6 mice is associated with long bones that are weaker because the larger cross-sectional area fails to compensate completely for their lower BMD and BMC.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, 601 North 30th Street #5766, Omaha, Nebraska 68131, USA
| | | | | | | | | | | |
Collapse
|
35
|
Abstract
Limited research in young adults and immature animals suggests a detrimental effect of tobacco on bone during growth. This study investigated the effects of nicotine, the major alkaloid component of tobacco, on calciotropic hormone concentrations and bone status in growing female rats. One-month-old animals received either saline (n = 10), nicotine at 3.0 mg/kg/day (n = 10), or nicotine at 4.5 mg/kg/day (n = 10) administered subcutaneously via osmotic minipumps for either 2 or 3 months. Sera, femora, tibiae, and lumbar vertebrae (3-5) were collected at necropsy. The concentrations of serum calcium, phosphorus, 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D, parathyroid hormone, calcitonin, and insulin-like growth factor-I were determined. Bone variables evaluated included mineral content and density (vertebrae and femora), cancellous and cortical histomorphometry (tibiae), and bone strength (vertebrae and femora). Statistically significant differences in serum mineral and hormone concentrations were not associated with nicotine dose or exposure time. No significant nicotine treatment effects were detected for bone mineral content and density, bone histomorphometry, or bone strength. We conclude that nicotine treatment for 2 or 3 months at serum concentrations in the upper range of those found in smokers has no detrimental effect on bone mass, volume, or strength in the growing rat.
Collapse
Affiliation(s)
- U T Iwaniec
- Osteoporosis Research Center, Creighton University, Omaha, Nebraska 68131, USA
| | | | | | | | | | | |
Collapse
|
36
|
Abstract
Increased mechanical loading of bone with the rat tibia four-point bending device stimulates bone formation on periosteal and endocortical surfaces. With long-term loading cell activity diminishes, and it has been reported that early gains in bone size may reverse. This study examined the time course for bone cellular and structural response after 6, 12, and 18 wk of loading at 1,200-1, 700 microstrain (muepsilon). Bone formation rates, measured by histomorphometry, were compared within groups, between loaded and contralateral nonloaded tibiae, and between weeks. Formation surface, mineral apposition rate, and bone formation rate on periosteal and endocortical surfaces were elevated after 6 wk of loading. By 12 wk of loading, periosteal and endocortical formation surface and endocortical mineral apposition rates were elevated. By 18 wk of loading, periosteal adaptation appeared complete, whereas endocortical mineral apposition rate remained elevated. No periosteal resorption was observed. Average thickness of new bone formed, from baseline to collection, was greater in loaded than nonloaded tibiae by week 6 and was maintained through week 18. Early increases in bone formation result in periosteal apposition of new bone that persists after formation ceases.
Collapse
Affiliation(s)
- D M Cullen
- Osteoporosis Research Center, Creighton University, Omaha, NE 68131, USA.
| | | | | |
Collapse
|
37
|
Ødegård SW, Hagemann GB, Törmänen S, Tjøm PO, Harsmann A, Bergström M, Bark RA, Herskind B, Sletten G, Görgen A, Hübel H, Aengenvoort B, van Severen U, Ur C, Jensen HJ, Napoli D, Lenzi S, Petrache C, Fahlander C, Ryde H, Bracco A, Frattini S, Chapman R, Cullen DM, King SL. Enhanced E1-Decay from Triaxial SD Bands in 164Lu. The Nucleus 2000. [DOI: 10.1007/978-1-4615-4257-5_46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
38
|
Bentley MA, O’Leary CD, Appelbe DE, Bark RA, Cullen DM, Ertürk S, Maj A, Warner DD. Mirror Nuclei and Odd-Odd N = Z Nuclei in the f 7/2 Shell. The Nucleus 2000. [DOI: 10.1007/978-1-4615-4257-5_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
39
|
Fung YK, Iwaniec U, Cullen DM, Akhter MP, Haven MC, Timmins P. Long-term effects of nicotine on bone and calciotropic hormones in adult female rats. Pharmacol Toxicol 1999; 85:181-7. [PMID: 10563517 DOI: 10.1111/j.1600-0773.1999.tb00089.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study determined the effects of nicotine on serum concentrations of several calciotropic hormones, and bone formation and resorption end-points in 7 month old, adult female rats. Animals were administered either saline (n= 9/group), low dose nicotine at 3.0 mg/kg/day (n=10/group) or high dose nicotine at 4.5 mg/kg/day (n=11/group) by subcutaneous osmotic minipumps. At the end of a three months treatment period, serum concentrations of calcium, phosphorus, parathyroid hormone, calcitonin, 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D were determined. Femora, tibiae, and lumbar vertebrae (3-5) were collected and bone parameters evaluated included mineral density and content (femora and vertebrae), strength (femora and vertebrae) and histomorphometry (tibiae). Animals given nicotine had significantly lower levels of 25-hydroxyvitamin D than controls [20.8+/-1.4 ng/ml for the low dose group and 20.7+/-1.0 ng/ ml for the high dose group versus 27.6+/-1.3 ng/ml for the control group (mean+/-S.E.M.), P<0.01]. The high dose nicotine group had smaller vertebral areas (5.4+/-0.2 mm2 versus 6.2+/-0.2 mm2, P<0.05) and a lower bone mineral content than the controls (0.024+/-0.001 g versus 0.030+/-0.001 g, P<0.05). Tibial endocortical mineral apposition rate was also significantly lower in the high dose nicotine group than in the control group (1.06+/-0.13 microm/day versus 1.42+/-0.08 microm/day. P<0.05). No significant treatment differences were detected in bone density, cancellous bone histomorphometry, or bone strength. Results from the present study suggest that nicotine administration may adversely affect bone formation and decrease body storage of vitamin D.
Collapse
Affiliation(s)
- Y K Fung
- Department of Oral Biology, University of Nebraska Medical Center, College of Dentistry, Lincoln 68583-0740, USA
| | | | | | | | | | | |
Collapse
|
40
|
Abstract
Bone, being sensitive to mechanical stimulus, adapts to mechanical loads in response to bending or deformation. Although the signal/receptor mechanism for bone adaptation to deformation is still under investigation, the mechanical signal is related to the amount of bone deformation or strain. Adaptation to changes in physical activity depends on both the magnitude of increase in strain above average daily levels for maintaining current bone density and the Minimum Effective Strain (MES) for initiating adaptive bone formation. Given the variation of peak bone density that exists in any human population, it is likely that variation in levels for MES is, to a considerable degree, inherited and varies among animal species and breeds. This study showed a dose-related periosteal response to loading in C3H/HeJ mice. The extent of active formation surface, the rate of periosteal bone formation, and area of bone formation increased with increasing peak periosteal strain. In these mice, the loaded tibia consistently showed lower endocortical formation surface and mineral apposition rate than the nonloaded bones at every load level. Although periosteal expansion is the most efficient means of increasing moment of inertia in adaptation to bending, a dose response increase in endocortical formation would have been predicted. Our characterization of the mouse bone formation response to increasing bending loads will be useful in the design of experiments to study the tibial adaptive response to known loads in different mouse breeds.
Collapse
Affiliation(s)
- E A Pedersen
- Osteoporosis Research Center, Creighton University, 601 North 30th Street #5766, Omaha, Nebraska 68131, USA
| | | | | | | | | |
Collapse
|
41
|
Abstract
We investigated the bone response to external loading in C57BL/6J and C3H/HeJ mice, both breeds with low and high bone density, respectively. An in vivo tibial four-point bending device previously used for application of measured external loads in rats was adapted for mice. It delivered a uniform medio-lateral bending moment to the region of the tibia located 1-5.5 mm proximal to the tibio-fibula junction. The right legs of six C57BL/6J [low bone density (LBD)] and C3H/HeJ [high bone density (HBD)] mice were externally loaded in the device for 36 cycles/day at 2 Hz, 6 days/week for 2 weeks at 9.3 +/- 0.9 N force, inducing estimated lateral periosteal surface compressive strains of 5121 +/- 1128 mu epsilon in C3H/HeJ (HBD) mice (n = 6), significantly higher than the estimated 3988 +/- 820 mu epsilon in C57BL/6J mice (n = 6) (mean +/- SD). In addition, C3H/HeJ HBD mice (n = 11) were externally sham (pad pressure or no bending) loaded in the device for 36 cycles/day at 2 Hz, 3 days/week for 3 weeks at 9.3 +/- 0.9 N force. Calcein injections for bone labeling were given at the 10th and 3rd days before sacrifice. At the end of the experiment, all mice were killed and both tibiae were removed, fixed, embedded, and cross-sectioned through the loaded region. Both tibiae were measured for marrow area (Ma.Ar), cortical area (Ct.Ar), total area (Tt.Ar), cross-sectional moment of inertia (CSMI), and periosteal and endocortical woven bone surface (Wo.B/BS), single-labeled surface (sLS), double-labeled surface (dLS), and total formation surface (FS/BS). Differences in all variables due to breed and loading (both bending and sham-bending) were tested by two-way analysis of variance (ANOVA) (P < 0.05). Ma.Ar, Tt.Ar, and CSMI were greater in C57BL/6J (LBD) than in C3H/HeJ (HBD) mice. Periosteal and endocortical woven bone and formation surface were increased significantly more by loading (bending) in C57BL/6J than in C3H/HeJ mice. Periosteal woven bone response due to sham-bending or sham-loading was significantly lower than due to bending loads in the C3H/HeJ mice. We conclude that the bone response to external loading is greater in LBD mice than in HBD mice. The high bone density of C3H/HeJ (HBD) mice is related to breed-specific factors other than the response to loading.
Collapse
Affiliation(s)
- M P Akhter
- Osteoporosis Research Center, Creighton University, 601 North 30th Street 5766, Omaha, Nebraska 68131, USA
| | | | | | | | | |
Collapse
|
42
|
Abstract
The time course of the bone cellular response to mechanical loading is important in the design of optimal exercise prescriptions. This study examined the time course of periosteal cellular changes in the rat tibia following a single exposure of mechanical loading in four-point bending. The right tibiae of adult female Sprague Dawley rats (n = 48, 346 +/- 29 g) were loaded at 40 N (2000 mu epsilon) for 36 cycles at 2 Hz. Right loaded (L) and left nonloaded (NL) tibiae were collected on days 1, 2, 3, 4, 6, and 9 after loading. Cross sections from the loaded region were examined for periosteal differences in bone lining cell surface length, osteoblast surface length, and both alkaline phosphatase-positive cell surface length and width in the cellular layer. A single loading session increased osteoblast surface length as early as day 2, with a peak in expression on day 3. Nine days after a single loading session osteoblast surface length was not different from nonloaded control levels. Alkaline phosphatase width in the cellular periosteum was elevated by day 2 and remained elevated through day 9. This study shows the transient increase in osteoblast surface following a single loading session. It provides fundamental information regarding the timing of osteoblast appearance and the longevity of the response following mechanical stimulation.
Collapse
Affiliation(s)
- M D Boppart
- Osteoporosis Research Center, Creighton University, Omaha, NE 68131, USA
| | | | | | | |
Collapse
|
43
|
Abstract
The study tested the influence of prostaglandin E2 (PGE2) on the skeletal response to increased in vivo mechanical loading through a four-point bending device. One hundred and twenty Sprague-Dawley female rats (6 months old, 354 +/- 34 g) were divided into 12 groups to accommodate all possible combinations of doses of loads (25, 30, or 35 N) and PGE2 (0, 0.1, 0.3, or 1 mg/kg). Rats received subcutaneous injections of PGE2 daily and in vivo loading of the right tibia every Monday, Wednesday, and Friday for four weeks. Histomorphometric analysis of the periosteal and endocortical surfaces following in vivo dual fluorochrome labeling was performed on both the loaded region of the right tibial diaphysis and a similar region of the left tibial diaphysis. Without PGE2, the threshold for loading to stimulate bone formation was 30 N (peak strain 1360 mu epsilon) at the periosteal surface and 25 N (peak strain 580 mu epsilon) at the endocortical surface. Without loading, the minimum dose of PGE2 to stimulate bone formation at all surfaces was 1 mg/kg/day. When 1 mg/kg/day PGE2 was combined with the minimum effective load, an additive effect of PGE2 and loading on bone formation was observed at the endocortical surface, but a synergistic effect was noted at the periosteal surface. No combined effect of ineffective doses of loading and PGE2 was found. A synergistic effect at peak strains of approximately 1625 mu epsilon on the periosteal surface could suggest either the involvement of locally produced growth factors or autoregulation of endogenous synthesis of PGE2 by exogenously administered PGE2.
Collapse
Affiliation(s)
- L Y Tang
- Osteoporosis Research Center, Creighton University, Omaha, Nebraska, USA
| | | | | | | | | |
Collapse
|
44
|
Bindra KS, Hua PF, Babu BR, Baktash C, Barreto J, Cullen DM, Davids CN, Deng JK, Garrett JD, Halbert ML, Hamilton JH, Johnson NR, Kirov A, Kormicki J, Lee IY, Ma WC, McGowan FK, Ramayya AV, Sarantites DG, Soramel F, Winchell D. Reply to "Comment on 'Prolate-oblate band mixing and new bands in 182Hg' ". Phys Rev C Nucl Phys 1996; 53:3165. [PMID: 9971308 DOI: 10.1103/physrevc.53.3165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
45
|
Cullen DM, Baktash C, Fitch MJ, Frosch I, Gray RW, Johnson NR, Lee IY, Macchiavelli AO, Reviol W, Wang X, Yu C. High-spin states and K-forbidden decay in 172Hf. Phys Rev C Nucl Phys 1995; 52:2415-2428. [PMID: 9970769 DOI: 10.1103/physrevc.52.2415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
46
|
Baktash C, Cullen DM, Garrett JD, Gross CJ, Johnson NR, Nazarewicz W, Sarantites DG, Simpson J, Werner TR. First observation of a superdeformed band in the N,Z. Phys Rev Lett 1995; 74:1946-1949. [PMID: 10057803 DOI: 10.1103/physrevlett.74.1946] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
47
|
Bindra KS, Hua PF, Babu BR, Baktash C, Barreto J, Cullen DM, Davids CN, Deng JK, Garrett JD, Halbert ML, Hamilton JH, Johnson NR, Kirov A, Kormicki J, Lee IY, Ma WC, McGowan FK, Ramayya AV, Sarantites DG, Soramel F, Winchell D. Prolate-oblate band mixing and new bands in 182Hg. Phys Rev C Nucl Phys 1995; 51:401-404. [PMID: 9970075 DOI: 10.1103/physrevc.51.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
48
|
Lee IY, Baktash C, Cullen DM, Garrett JD, Johnson NR, McGowan FK, Winchell DF, Yu CH. Lifetimes of low-spin states in the superdeformed band of 192Hg. Phys Rev C Nucl Phys 1994; 50:2602-2605. [PMID: 9969949 DOI: 10.1103/physrevc.50.2602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
49
|
Abstract
Temporary immobilization creates bone loss. The purpose of this investigation was to use an agent to protect the skeleton from bone loss bone during temporary immobilization. Eighty-nine 6-month-old retired breeder Sprague-Dawley female rats were used. Animals were randomly divided into six groups of equal numbers. Four groups were given drinking water from day 0, containing naproxen (100 or 200 mg/l). At day 7, half the animals in all groups had their right hindlimb immobilized. At day 49, half the immobilized rats and non-immobilized controls were sacrificed. The remaining rats were remobilized and the drug was stopped. At day 91, all remaining rats were sacrificed. Gastrocnemius and soleus muscle weights were determined. Right tibiae were analyzed for cancellous bone mass, bone structural and bone dynamic variables. At the close of immobilization, bone mass was lower in the right (immobilized) hindlimb of the immobilized group than in the non-immobilized group. Immobilized rats drinking 100 mg/l naproxen water had significantly higher bone mass in their immobilized limbs than did untreated immobilized rats, but all rats drinking 200 mg/l naproxen water had lower bone mass than controls. After 6 weeks of recovery, bone mass in the immobilized limb of untreated formerly immobilized rats improved, but remained below untreated never-immobilized rats. Formerly immobilized rats that had been treated with 100 mg/l naproxen water had normal bone mass after 6 weeks of recovery. Naproxen, an agent that mildly depresses activation frequency, prevents some of the transient bone mass and structural deterioration during temporary immobilization. Such treatment facilitates a more rapid return to normal bone mass, though not to normal structure. The more rapid recovery occurs because the difference from normal is less, not because of more rapid formation in recovering animals.
Collapse
Affiliation(s)
- N Lane
- Division of Rheumatology, University of California at San Francisco 94143
| | | | | | | |
Collapse
|
50
|
Gross CJ, Baktash C, Cullen DM, Cunningham RA, Garrett JD, Gelletly W, Hannachi F, Harder A, Kabadiyski MK, Lieb KP, Lister CJ, Nazarewicz W, Roth HA, Rudolph D, Sarantites DG, Sheikh JA, Simpson J, Skeppstedt Ö, Varley BJ, Warner DD. Identical bands in 77Sr, 78Sr, and 78Rb: Evidence for a very good spectator orbital. Phys Rev C Nucl Phys 1994; 49:R580-R583. [PMID: 9969336 DOI: 10.1103/physrevc.49.r580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|