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Gjestvang D, Siem S, Zeiser F, Randrup J, Vogt R, Bello-Garrote F, Bernstein L, Bleuel D, Guttormsen M, Görgen A, Larsen A, Malatji K, Matthews E, Modamio V, Oberstedt A, Oberstedt S, Tornyi T, Tveten G, Voyles A, Wilson J. The study of prompt fission γ rays at the Oslo Cyclotron Laboratory. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125600005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The study of prompt fission γ rays (PFGs) is crucial for understanding the energy and angular momentum distribution in fission, and over the last decade there has been an revived interest in this aspect of fission. We present the new experimental setup at the Oslo Cyclotron Laboratory for detecting PFGs resulting from charged particle-induced fission. Additionally, PFGs from the reaction 240Pu(d,pf) were measured in April 2018, and the fission gated proton-γ coincidence spectrum is shown. In order to explore the dependence of the PFG emission on the excitation energy and angular momentum of the compound nucleus, we plan several experiments where charged particle reactions are used to induce fission in various plutonium isotopes. The final results will be compared to predictions made by the Fission Reaction Event Yield Algorithm (FREYA) in an upcoming publication, to benchmark the current modelling of both the PFGs and the fission process.
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Boso A, Lenzi SM, Recchia F, Bonnard J, Zuker AP, Aydin S, Bentley MA, Cederwall B, Clement E, de France G, Di Nitto A, Dijon A, Doncel M, Ghazi-Moradi F, Gadea A, Gottardo A, Henry T, Hüyük T, Jaworski G, John PR, Juhász K, Kuti I, Melon B, Mengoni D, Michelagnoli C, Modamio V, Napoli DR, Nyakó BM, Nyberg J, Palacz M, Timár J, Valiente-Dobón JJ. Neutron Skin Effects in Mirror Energy Differences: The Case of ^{23}Mg-^{23}Na. Phys Rev Lett 2018; 121:032502. [PMID: 30085775 DOI: 10.1103/physrevlett.121.032502] [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: 04/13/2018] [Indexed: 06/08/2023]
Abstract
Energy differences between analogue states in the T=1/2 ^{23}Mg-^{23}Na mirror nuclei have been measured along the rotational yrast bands. This allows us to search for effects arising from isospin-symmetry-breaking interactions (ISB) and/or shape changes. Data are interpreted in the shell model framework following the method successfully applied to nuclei in the f_{7/2} shell. It is shown that the introduction of a schematic ISB interaction of the same type of that used in the f_{7/2} shell is needed to reproduce the data. An alternative novel description, applied here for the first time, relies on the use of an effective interaction deduced from a realistic charge-dependent chiral nucleon-nucleon potential. This analysis provides two important results: (i) The mirror energy differences give direct insight into the nuclear skin; (ii) the skin changes along the rotational bands are strongly correlated with the difference between the neutron and proton occupations of the s_{1/2} "halo" orbit.
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Affiliation(s)
- A Boso
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - S M Lenzi
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - F Recchia
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - J Bonnard
- INFN, Sezione di Padova, I-35131 Padova, Italy
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
| | - A P Zuker
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- Universitè de Strasbourg and IPHC, F-67000 Strasbourg, France
| | - S Aydin
- Aksaray Universitesi, Department of Physics, TR-68100 Aksaray, Turkey
| | - M A Bentley
- University of York, Department of Physics, YO10 5DD York, United Kingdom
| | - B Cederwall
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - E Clement
- GANIL, CEA/DRF-CNRS/IN2P3, F-14076 Caen, France
| | - G de France
- GANIL, CEA/DRF-CNRS/IN2P3, F-14076 Caen, France
| | - A Di Nitto
- Dipartimento di Fisica and INFN, Sezione di Napoli, I-80126 Napoli, Italy
- Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - A Dijon
- GANIL, CEA/DRF-CNRS/IN2P3, F-14076 Caen, France
| | - M Doncel
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - F Ghazi-Moradi
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - A Gadea
- IFIC, CSIC-Universitat de València, E-46980 Valencia, Spain
| | - A Gottardo
- INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy
| | - T Henry
- University of York, Department of Physics, YO10 5DD York, United Kingdom
| | - T Hüyük
- IFIC, CSIC-Universitat de València, E-46980 Valencia, Spain
| | - G Jaworski
- Heavy Ion Laboratory, Warsaw University, 02-093 Warszawa, Poland
| | - P R John
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - K Juhász
- Institute of Nuclear Research (ATOMKI) of Hung. Acad. Sciences, H-4001 Debrecen, Hungary
| | - I Kuti
- Institute of Nuclear Research (ATOMKI) of Hung. Acad. Sciences, H-4001 Debrecen, Hungary
| | - B Melon
- Dipartimento di Fisica and INFN, Sezione di Firenze, I-50019 Firenze, Italy
| | - D Mengoni
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - C Michelagnoli
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - V Modamio
- INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy
| | - D R Napoli
- INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy
| | - B M Nyakó
- Institute of Nuclear Research (ATOMKI) of Hung. Acad. Sciences, H-4001 Debrecen, Hungary
| | - J Nyberg
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - M Palacz
- Heavy Ion Laboratory, Warsaw University, 02-093 Warszawa, Poland
| | - J Timár
- Institute of Nuclear Research (ATOMKI) of Hung. Acad. Sciences, H-4001 Debrecen, Hungary
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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.
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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
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4
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Rocchini M, Nannini A, Benzoni G, Melon B, John P, Ur C, Avigo R, Bazzacco D, Blasi N, Bocchi G, Bottoni S, Bracco A, Camera F, Ceruti S, Crespi F, Georgiev G, Giaz A, Gottardo A, Leoni S, Menegazzo R, Mengoni D, Michelagnoli C, Million B, Modamio V, Morales A, Napoli D, Ottanelli M, Pellegri L, Perego A, Valiente-Dobon J, Wieland O. g-factor measurements of isomeric states in 174W. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611704007] [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
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5
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Ceruti S, Camera F, Bracco A, Avigo R, Benzoni G, Blasi N, Bocchi G, Bottoni S, Brambilla S, Crespi FCL, Giaz A, Leoni S, Mentana A, Million B, Morales AI, Nicolini R, Pellegri L, Pullia A, Riboldi S, Wieland O, Birkenbach B, Bazzacco D, Ciemala M, Désesquelles P, Eberth J, Farnea E, Görgen A, Gottardo A, Hess H, Judson DS, Jungclaus A, Kmiecik M, Korten W, Maj A, Menegazzo R, Mengoni D, Michelagnoli C, Modamio V, Montanari D, Myalski S, Napoli D, Quintana B, Reiter P, Recchia F, Rosso D, Sahin E, Salsac MD, Söderström PA, Stezowski O, Theisen C, Ur C, Valiente-Dobón JJ, Zieblinski M. Isospin Mixing in ^{80}Zr: From Finite to Zero Temperature. Phys Rev Lett 2015; 115:222502. [PMID: 26650299 DOI: 10.1103/physrevlett.115.222502] [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: 03/26/2015] [Indexed: 06/05/2023]
Abstract
The isospin mixing was deduced in the compound nucleus ^{80}Zr at an excitation energy of E^{*}=54 MeV from the γ decay of the giant dipole resonance. The reaction ^{40}Ca+^{40}Ca at E_{beam}=136 MeV was used to form the compound nucleus in the isospin I=0 channel, while the reaction ^{37}Cl+^{44}Ca at E_{beam}=95 MeV was used as the reference reaction. The γ rays were detected with the AGATA demonstrator array coupled with LaBr_{3}:Ce detectors. The temperature dependence of the isospin mixing was obtained and the zero-temperature value deduced. The isospin-symmetry-breaking correction δ_{C} used for the Fermi superallowed transitions was extracted and found to be consistent with β-decay data.
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Affiliation(s)
- S Ceruti
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione 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
| | - A Bracco
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - R Avigo
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - G Benzoni
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - N Blasi
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - G Bocchi
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Bottoni
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Brambilla
- 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
| | - A Giaz
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Leoni
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A Mentana
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - B Million
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A I Morales
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - R Nicolini
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - L Pellegri
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A Pullia
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Riboldi
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - O Wieland
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - D Bazzacco
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - M Ciemala
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - P Désesquelles
- CSNSM, CNRS/IN2P3 and Univ. Paris-Sud, F-91405 Orsay Campus, France
| | - 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
| | - A Görgen
- IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
- Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway
| | - A Gottardo
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - 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
| | - M Kmiecik
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - W Korten
- IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - A Maj
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - R Menegazzo
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - D Mengoni
- INFN, Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - C Michelagnoli
- INFN, Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - V Modamio
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - D Montanari
- INFN, Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - S Myalski
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - D Napoli
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - B Quintana
- Laboratorio de Radiaciones Ionizantes, Universidad de Salamanca, E-37008 Salamanca, Spain
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - F Recchia
- INFN, Sezione di Padova, I-35131 Padova, Italy
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy
| | - D Rosso
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - E Sahin
- Department of Physics, University of Oslo, P.O. Box 1048 Blindern, N-0316 Oslo, Norway
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - M D Salsac
- IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - P-A Söderström
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - O Stezowski
- Université Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France
| | - Ch Theisen
- IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - C Ur
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | | | - M Zieblinski
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
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6
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Marchi T, de Angelis G, Valiente-Dobón JJ, Bader VM, Baugher T, Bazin D, Berryman J, Bonaccorso A, Clark R, Coraggio L, Crawford HL, Doncel M, Farnea E, Gade A, Gadea A, Gargano A, Glasmacher T, Gottardo A, Gramegna F, Itaco N, John PR, Kumar R, Lenzi SM, Lunardi S, McDaniel S, Michelagnoli C, Mengoni D, Modamio V, Napoli DR, Quintana B, Ratkiewicz A, Recchia F, Sahin E, Stroberg R, Weisshaar D, Wimmer K, Winkler R. Quadrupole transition strength in the (74)Ni nucleus and core polarization effects in the neutron-rich Ni isotopes. Phys Rev Lett 2014; 113:182501. [PMID: 25396363 DOI: 10.1103/physrevlett.113.182501] [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: 04/30/2014] [Indexed: 06/04/2023]
Abstract
The reduced transition probability B(E2;0(+)→2(+)) has been measured for the neutron-rich nucleus (74)Ni in an intermediate energy Coulomb excitation experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University. The obtained B(E2;0(+)→2(+))=642(-226)(+216) e(2) fm(4) value defines a trend which is unexpectedly small if referred to (70)Ni and to a previous indirect determination of the transition strength in (74)Ni. This indicates a reduced polarization of the Z=28 core by the valence neutrons. Calculations in the pfgd model space reproduce well the experimental result indicating that the B(E2) strength predominantly corresponds to neutron excitations. The ratio of the neutron and proton multipole matrix elements supports such an interpretation.
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Affiliation(s)
- T Marchi
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy and Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy
| | - G de Angelis
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - J J Valiente-Dobón
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - V M Bader
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Baugher
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Berryman
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Bonaccorso
- Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
| | - R Clark
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - L Coraggio
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, 80126 Napoli, Italy
| | - H L Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M Doncel
- Laboratorio De Radiaciones Ionizantes, Universidad de Salamanca, 37008 Salamanca, Spain
| | - E Farnea
- Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - A Gade
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Gadea
- Instituto de Física Corpuscular, CSIC-Universitat de València, 46980 València, Spain
| | - A Gargano
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, 80126 Napoli, Italy
| | - T Glasmacher
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Gottardo
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - F Gramegna
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - N Itaco
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, 80126 Napoli, Italy and Dipartimento di Fisica, Università di Napoli Federico II, 80126 Napoli, Italy
| | - P R John
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - R Kumar
- Department of Physics, Deenbandhu Chhoturam University of Science and Technology, Murthal, Sonepat, Haryana 131039, India
| | - S M Lenzi
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - S Lunardi
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - S McDaniel
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Michelagnoli
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - D Mengoni
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - V Modamio
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - D R Napoli
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - B Quintana
- Laboratorio De Radiaciones Ionizantes, Universidad de Salamanca, 37008 Salamanca, Spain
| | - A Ratkiewicz
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - F Recchia
- Dipartimento di Fisica e Astronomia dell'Università degli Studi di Padova, 35131 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
| | - E Sahin
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, 35020 Legnaro, Italy
| | - R Stroberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Weisshaar
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - K Wimmer
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - R Winkler
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
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Gottardo A, Valiente-Dobón J, Benzoni G, Gadea A, Lunardi S, Boutachkov P, Bruce A, Górska M, Grebosz J, Pietri S, Podolyák Z, Pfützner M, Regan P, Weick H, Núñez JA, Algora A, Al-Dahan N, Angelis GD, Ayyad Y, Alkhomashi N, Allegro P, Bazzacco D, Benlliure J, Bowry M, Bracco A, Bunce M, Camera F, Casarejos E, Cortes M, Crespi F, Corsi A, Bacelar AD, Deo A, Domingo-Pardo C, Doncel M, Dombradi Z, Engert T, Eppinger K, Farrelly G, Farinon F, Farnea E, Geissel H, Gerl J, Goel N, Gregor E, Habermann T, Hoischen R, Janik R, John PR, Klupp S, Kojouharov I, Kurz N, Lenzi S, Leoni S, Mandal S, Menegazzo R, Mengoni D, Million B, Modamio V, Morales A, Napoli D, Naqvi F, Nicolini R, Nociforo C, Prochazka A, Prokopowicz W, Recchia F, Ribas R, Reed M, Rudolph D, Sahin E, Schaffner H, Sharma A, Sitar B, Siwal D, Steiger K, Strmen P, Swan T, Szarka I, Ur C, Walker P, Wieland O, Wollersheim HJ. New Isomers in the Neutron-Rich Region Beyond 208Pb. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146602043] [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
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8
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John P, Modamio V, Valiente-Dobón J, Mengoni D, Gottardo A, Bazzacco D, Lunardi S, Alexander T, Angelis GD, Ashwood N, Barr M, Bizzeti P, Bizzeti-Sona A, Bottoni S, Bowry M, Bracco A, Browne F, Bunce M, Gadea A, Camera F, Corradi L, Crespi F, Farnea E, Fioretto E, Kokalova T, Korten W, Kuşoğlu A, Lenzi S, Leoni S, Michelagnoli C, Mijatović T, Montagnoli G, Montanari D, Napoli D, Podolyák Z, Pollarolo G, Recchia F, Roberts O, Şahin E, Salsac MD, Scarlassara F, Stefanini A, Szilner S, Ur C, Walshe J, Wheldon C. Study of shape transition in the neutron-rich Os isotopes. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20146602057] [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
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9
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Jungclaus A, Cáceres L, Górska M, Pfützner M, Pietri S, Werner-Malento E, Grawe H, Langanke K, Martínez-Pinedo G, Nowacki F, Poves A, Cuenca-García JJ, Rudolph D, Podolyak Z, Regan PH, Detistov P, Lalkovski S, Modamio V, Walker J, Bednarczyk P, Doornenbal P, Geissel H, Gerl J, Grebosz J, Kojouharov I, Kurz N, Prokopowicz W, Schaffner H, Wollersheim HJ, Andgren K, Benlliure J, Benzoni G, Bruce AM, Casarejos E, Cederwall B, Crespi FCL, Hadinia B, Hellström M, Hoischen R, Ilie G, Jolie J, Khaplanov A, Kmiecik M, Kumar R, Maj A, Mandal S, Montes F, Myalski S, Simpson GS, Steer SJ, Tashenov S, Wieland O. Observation of isomeric decays in the r-process waiting-point nucleus 130Cd82. Phys Rev Lett 2007; 99:132501. [PMID: 17930581 DOI: 10.1103/physrevlett.99.132501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Indexed: 05/25/2023]
Abstract
The gamma decay of excited states in the waiting-point nucleus (130)Cd(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a (136)Xe beam as well as in projectile fission of 238U, making (130)Cd the most neutron-rich N = 82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N = 82 shell quenching at Z = 48. They allow us to follow nuclear isomerism throughout a full major neutron shell from (98)Cd(50) to (130)Cd(82) and reveal, in comparison with (76)Ni(48) one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.
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Affiliation(s)
- A Jungclaus
- Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
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