1
|
Iimura S, Rosenbusch M, Takamine A, Tsunoda Y, Wada M, Chen S, Hou DS, Xian W, Ishiyama H, Yan S, Schury P, Crawford H, Doornenbal P, Hirayama Y, Ito Y, Kimura S, Koiwai T, Kojima TM, Koura H, Lee J, Liu J, Michimasa S, Miyatake H, Moon JY, Naimi S, Nishimura S, Niwase T, Odahara A, Otsuka T, Paschalis S, Petri M, Shimizu N, Sonoda T, Suzuki D, Watanabe YX, Wimmer K, Wollnik H. Study of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI. Phys Rev Lett 2023; 130:012501. [PMID: 36669221 DOI: 10.1103/physrevlett.130.012501] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
The atomic masses of ^{55}Sc, ^{56,58}Ti, and ^{56-59}V have been determined using the high-precision multireflection time-of-flight technique. The radioisotopes have been produced at RIKEN's Radioactive Isotope Beam Factory (RIBF) and delivered to the novel designed gas cell and multireflection system, which has been recently commissioned downstream of the ZeroDegree spectrometer following the BigRIPS separator. For ^{56,58}Ti and ^{56-59}V, the mass uncertainties have been reduced down to the order of 10 keV, shedding new light on the N=34 shell effect in Ti and V isotopes by the first high-precision mass measurements of the critical species ^{58}Ti and ^{59}V. With the new precision achieved, we reveal the nonexistence of the N=34 empirical two-neutron shell gaps for Ti and V, and the enhanced energy gap above the occupied νp_{3/2} orbit is identified as a feature unique to Ca. We perform new Monte Carlo shell model calculations including the νd_{5/2} and νg_{9/2} orbits and compare the results with conventional shell model calculations, which exclude the νg_{9/2} and the νd_{5/2} orbits. The comparison indicates that the shell gap reduction in Ti is related to a partial occupation of the higher orbitals for the outer two valence neutrons at N=34.
Collapse
Affiliation(s)
- S Iimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Department of Physics, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Tokyo 171-8501, Japan
| | - M Rosenbusch
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - A Takamine
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Tsunoda
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - M Wada
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - S Chen
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - D S Hou
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - W Xian
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - H Ishiyama
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - S Yan
- Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou 510632, China
| | - P Schury
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - H Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94523, USA
| | - P Doornenbal
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y Hirayama
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - Y Ito
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
| | - S Kimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - T Koiwai
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T M Kojima
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - H Koura
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
| | - J Lee
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - J Liu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - S Michimasa
- Center of Nuclear Study (CNS), The University of Tokyo, Bunkyo 113-0033, Japan
| | - H Miyatake
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - J Y Moon
- Institute for Basic Science, 70, Yuseong-daero 1689-gil, Yusung-gu, Daejeon 305-811, Korea
| | - S Naimi
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - S Nishimura
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - T Niwase
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
- Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - A Odahara
- Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - T Otsuka
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Paschalis
- School of Physics, Engineering, and Technology, University of York, York YO10 5DD, United Kingdom
| | - M Petri
- School of Physics, Engineering, and Technology, University of York, York YO10 5DD, United Kingdom
| | - N Shimizu
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - T Sonoda
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - D Suzuki
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - Y X Watanabe
- Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
| | - K Wimmer
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - H Wollnik
- New Mexico State University, Las Cruces, New Mexico 88001, USA
| |
Collapse
|
2
|
Mărginean N, Little D, Tsunoda Y, Leoni S, Janssens RVF, Fornal B, Otsuka T, Michelagnoli C, Stan L, Crespi FCL, Costache C, Lica R, Sferrazza M, Turturica A, Ayangeakaa AD, Auranen K, Barani M, Bender PC, Bottoni S, Boromiza M, Bracco A, Călinescu S, Campbell CM, Carpenter MP, Chowdhury P, Ciemała M, Cieplicka-Oryǹczak N, Cline D, Clisu C, Crawford HL, Dinescu IE, Dudouet J, Filipescu D, Florea N, Forney AM, Fracassetti S, Gade A, Gheorghe I, Hayes AB, Harca I, Henderson J, Ionescu A, Iskra ŁW, Jentschel M, Kandzia F, Kim YH, Kondev FG, Korschinek G, Köster U, Krzysiek M, Lauritsen T, Li J, Mărginean R, Maugeri EA, Mihai C, Mihai RE, Mitu A, Mutti P, Negret A, Niţă CR, Olăcel A, Oprea A, Pascu S, Petrone C, Porzio C, Rhodes D, Seweryniak D, Schumann D, Sotty C, Stolze SM, Şuvăilă R, Toma S, Ujeniuc S, Walters WB, Wu CY, Wu J, Zhu S, Ziliani S. Shape Coexistence at Zero Spin in ^{64}Ni Driven by the Monopole Tensor Interaction. Phys Rev Lett 2020; 125:102502. [PMID: 32955302 DOI: 10.1103/physrevlett.125.102502] [Citation(s) in RCA: 1] [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: 06/24/2020] [Accepted: 07/31/2020] [Indexed: 06/11/2023]
Abstract
The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded: combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0^{+} excitation is located at a surprisingly high energy (3463 keV), with a collective 2^{+} state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N=40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.
Collapse
Affiliation(s)
- N Mărginean
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - D Little
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255, USA
- Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708-2308, USA
| | - Y Tsunoda
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Leoni
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - R V F Janssens
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255, USA
- Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708-2308, USA
| | - B Fornal
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - T Otsuka
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium
| | - C Michelagnoli
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - L Stan
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - F C L Crespi
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - C Costache
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - R Lica
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - M Sferrazza
- Département de Physique, Université libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - A Turturica
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A D Ayangeakaa
- Department of Physics, United States Naval Academy, Annapolis, Maryland 21402, USA
| | - K Auranen
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M Barani
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - P C Bender
- Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
| | - S Bottoni
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - M Boromiza
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Bracco
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - S Călinescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C M Campbell
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M P Carpenter
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - P Chowdhury
- Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
| | - M Ciemała
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | | | - D Cline
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - C Clisu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - H L Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - I E Dinescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - J Dudouet
- Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France
| | - D Filipescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - N Florea
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A M Forney
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | - S Fracassetti
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - A Gade
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - I Gheorghe
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A B Hayes
- National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - I Harca
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - J Henderson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Ionescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - Ł W Iskra
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - M Jentschel
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - F Kandzia
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - Y H Kim
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - F G Kondev
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G Korschinek
- Technische Universität München, 80333 München, Germany
| | - U Köster
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - M Krzysiek
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - T Lauritsen
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Li
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Mărginean
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - E A Maugeri
- Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - C Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - R E Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Mitu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - P Mutti
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France
| | - A Negret
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C R Niţă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Olăcel
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Oprea
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Pascu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C Petrone
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C Porzio
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| | - D Rhodes
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Seweryniak
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Schumann
- Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - C Sotty
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S M Stolze
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Şuvăilă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Toma
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Ujeniuc
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - W B Walters
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | - C Y Wu
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Wu
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Zhu
- National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - S Ziliani
- Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133 Milano, Italy
| |
Collapse
|
3
|
Söderström PA, Capponi L, Açıksöz E, Otsuka T, Tsoneva N, Tsunoda Y, Balabanski DL, Pietralla N, Guardo GL, Lattuada D, Lenske H, Matei C, Nichita D, Pappalardo A, Petruse T. Electromagnetic character of the competitive γγ/γ-decay from 137mBa. Nat Commun 2020; 11:3242. [PMID: 32591502 PMCID: PMC7320027 DOI: 10.1038/s41467-020-16787-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 05/20/2020] [Indexed: 11/09/2022] Open
Abstract
Second-order processes in physics is a research topic focusing attention from several fields worldwide including, for example, non-linear quantum electrodynamics with high-power lasers, neutrinoless double-β decay, and stimulated atomic two-photon transitions. For the electromagnetic nuclear interaction, the observation of the competitive double-γ decay from 137mBa has opened up the nuclear structure field for detailed investigation of second-order processes through the manifestation of off-diagonal nuclear polarisability. Here, we confirm this observation with an 8.7σ significance, and an improved value on the double-photon versus single-photon branching ratio as 2.62 × 10-6(30). Our results, however, contradict the conclusions from the original experiment, where the decay was interpreted to be dominated by a quadrupole-quadrupole component. Here, we find a substantial enhancement in the energy distribution consistent with a dominating octupole-dipole character and a rather small quadrupole-quadrupole component in the decay, hindered due to an evolution of the internal nuclear structure. The implied strongly hindered double-photon branching in 137mBa opens up the possibility of the double-photon branching as a feasible tool for nuclear-structure studies on off-diagonal polarisability in nuclei where this hindrance is not present.
Collapse
Affiliation(s)
- P-A Söderström
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania.
| | - L Capponi
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania
| | - E Açıksöz
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania
| | - T Otsuka
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - N Tsoneva
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - D L Balabanski
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania
| | - N Pietralla
- Institut für Kernphysik, Technische Universität Darmstadt, 64289, Darmstadt, Germany
| | - G L Guardo
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania.,Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, 95125, Catania, Italy
| | - D Lattuada
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania.,Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, 95125, Catania, Italy.,Universitá degli Studi di Enna KORE, Viale delle Olimpiadi, 94100, Enna, Italy
| | - H Lenske
- Institut für Theoretische Physik, Universität Gießen, 35392, Gießen, Germany
| | - C Matei
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania
| | - D Nichita
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania.,Politehnica University of Bucharest, Splaiul Independentei 313, 060042, Bucharest, Romania
| | - A Pappalardo
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania
| | - T Petruse
- Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Str. Reactorului 30, 077125, Bucharest-Măgurele, Romania.,Politehnica University of Bucharest, Splaiul Independentei 313, 060042, Bucharest, Romania
| |
Collapse
|
4
|
Otsuka T, Tsunoda Y, Abe T, Shimizu N, Van Duppen P. Underlying Structure of Collective Bands and Self-Organization in Quantum Systems. Phys Rev Lett 2019; 123:222502. [PMID: 31868396 DOI: 10.1103/physrevlett.123.222502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/04/2019] [Indexed: 06/10/2023]
Abstract
The underlying structure of low-lying collective bands of atomic nuclei is discussed from a novel perspective on the interplay between single-particle and collective degrees of freedom, by utilizing state-of-the-art configuration interaction calculations on heavy nuclei. Besides the multipole components of the nucleon-nucleon interaction that drive collective modes forming those bands, the monopole component is shown to control the resistance against such modes. The calculated structure of ^{154}Sm corresponds to the coexistence between prolate and triaxial shapes, while that of ^{166}Er exhibits a deformed shape with a strong triaxial instability. Both findings differ from traditional views based on β/γ vibrations. The formation of collective bands is shown to be facilitated from a self-organization mechanism.
Collapse
Affiliation(s)
- T Otsuka
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium
| | - Y Tsunoda
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Abe
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - N Shimizu
- Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium
| |
Collapse
|
5
|
Rosiak D, Seidlitz M, Reiter P, Naïdja H, Tsunoda Y, Togashi T, Nowacki F, Otsuka T, Colò G, Arnswald K, Berry T, Blazhev A, Borge MJG, Cederkäll J, Cox DM, De Witte H, Gaffney LP, Henrich C, Hirsch R, Huyse M, Illana A, Johnston K, Kaya L, Kröll T, Benito MLL, Ojala J, Pakarinen J, Queiser M, Rainovski G, Rodriguez JA, Siebeck B, Siesling E, Snäll J, Van Duppen P, Vogt A, von Schmid M, Warr N, Wenander F, Zell KO. Enhanced Quadrupole and Octupole Strength in Doubly Magic ^{132}Sn. Phys Rev Lett 2018; 121:252501. [PMID: 30608829 DOI: 10.1103/physrevlett.121.252501] [Citation(s) in RCA: 2] [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: 05/28/2018] [Revised: 09/14/2018] [Indexed: 06/09/2023]
Abstract
The first 2^{+} and 3^{-} states of the doubly magic nucleus ^{132}Sn are populated via safe Coulomb excitation employing the recently commissioned HIE-ISOLDE accelerator at CERN in conjunction with the highly efficient MINIBALL array. The ^{132}Sn ions are accelerated to an energy of 5.49 MeV/nucleon and impinged on a ^{206}Pb target. Deexciting γ rays from the low-lying excited states of the target and the projectile are recorded in coincidence with scattered particles. The reduced transition strengths are determined for the transitions 0_{g.s.}^{+}→2_{1}^{+}, 0_{g.s.}^{+}→3_{1}^{-}, and 2_{1}^{+}→3_{1}^{-} in ^{132}Sn. The results on these states provide crucial information on cross-shell configurations which are determined within large-scale shell-model and Monte Carlo shell-model calculations as well as from random-phase approximation and relativistic random-phase approximation. The locally enhanced B(E2;0_{g.s.}^{+}→2_{1}^{+}) strength is consistent with the microscopic description of the structure of the respective states within all theoretical approaches. The presented results of experiment and theory can be considered to be the first direct verification of the sphericity and double magicity of ^{132}Sn.
Collapse
Affiliation(s)
- D Rosiak
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - M Seidlitz
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - H Naïdja
- Université de Strasbourg, IPHC, 23 rue du Loess, F-67037 Strasbourg, France
- CNRS, UMR 7178, F-67037 Strasbourg, France
- Université Constantine 1, LPMS, route Ain El Bey, DZ-25000 Constantine, Algeria
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Togashi
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - F Nowacki
- Université de Strasbourg, IPHC, 23 rue du Loess, F-67037 Strasbourg, France
- CNRS, UMR 7178, F-67037 Strasbourg, France
| | - T Otsuka
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - G Colò
- Dipartimento di Fisica, Universitò degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
- INFN sezione di Milano, Via Celoria 16, I-20133, Milano, Italy
| | - K Arnswald
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - T Berry
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - A Blazhev
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - M J G Borge
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
| | - J Cederkäll
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - D M Cox
- University of Jyvaskyla, Department of Physics, P. O. Box 35, FI-40014 University of Jyvaskyla, Finland
- Helsinki Institute of Physics, P. O. Box 64, FI-00014 Helsinki, Finland
| | - H De Witte
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - L P Gaffney
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
| | - C Henrich
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, D-64289 Darmstadt, Germany
| | - R Hirsch
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - M Huyse
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - A Illana
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - K Johnston
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
| | - L Kaya
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - Th Kröll
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, D-64289 Darmstadt, Germany
| | | | - J Ojala
- University of Jyvaskyla, Department of Physics, P. O. Box 35, FI-40014 University of Jyvaskyla, Finland
- Helsinki Institute of Physics, P. O. Box 64, FI-00014 Helsinki, Finland
| | - J Pakarinen
- University of Jyvaskyla, Department of Physics, P. O. Box 35, FI-40014 University of Jyvaskyla, Finland
- Helsinki Institute of Physics, P. O. Box 64, FI-00014 Helsinki, Finland
| | - M Queiser
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - G Rainovski
- Department of Atomic Physics, University of Sofia, 5 James Bourchier Boulevard, BG-1164 Sofia, Bulgaria
| | | | - B Siebeck
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - E Siesling
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
| | - J Snäll
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - P Van Duppen
- Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - A Vogt
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - M von Schmid
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, D-64289 Darmstadt, Germany
| | - N Warr
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| | - F Wenander
- ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
| | - K O Zell
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
| |
Collapse
|
6
|
Singh P, Korten W, Hagen TW, Görgen A, Grente L, Salsac MD, Farget F, Clément E, de France G, Braunroth T, Bruyneel B, Celikovic I, Delaune O, Dewald A, Dijon A, Delaroche JP, Girod M, Hackstein M, Jacquot B, Libert J, Litzinger J, Ljungvall J, Louchart C, Gottardo A, Michelagnoli C, Müller-Gatermann C, Napoli DR, Otsuka T, Pillet N, Recchia F, Rother W, Sahin E, Siem S, Sulignano B, Togashi T, Tsunoda Y, Theisen C, Valiente-Dobon JJ. Evidence for Coexisting Shapes through Lifetime Measurements in ^{98}Zr. Phys Rev Lett 2018; 121:192501. [PMID: 30468600 DOI: 10.1103/physrevlett.121.192501] [Citation(s) in RCA: 3] [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: 07/11/2018] [Revised: 09/21/2018] [Indexed: 06/09/2023]
Abstract
The lifetimes of the first excited 2^{+}, 4^{+}, and 6^{+} states in ^{98}Zr were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in ^{98}Zr were populated using the fission reaction between a 6.2 MeV/u ^{238}U beam and a ^{9}Be target. The γ rays were detected with the EXOGAM array in correlation with the fission fragments identified by mass and atomic number in the VAMOS++ spectrometer. Our result shows a very small B(E2;2_{1}^{+}→0_{1}^{+}) value in ^{98}Zr, thereby confirming the very sudden onset of collectivity at N=60. The experimental results are compared to large-scale Monte Carlo shell model and beyond-mean-field calculations. The present results indicate the coexistence of two additional deformed shapes in this nucleus along with the spherical ground state.
Collapse
Affiliation(s)
- Purnima Singh
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - W Korten
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - T W Hagen
- Department of Physics, University of Oslo, Oslo N-0316, Norway
| | - A Görgen
- Department of Physics, University of Oslo, Oslo N-0316, Norway
| | - L Grente
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M-D Salsac
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - F Farget
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - E Clément
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - G de France
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - T Braunroth
- Institut für Kernphysik, Universität zu Köln, Köln D-50937, Germany
| | - B Bruyneel
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - I Celikovic
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
- Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade 11000, Serbia
| | - O Delaune
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - A Dewald
- Institut für Kernphysik, Universität zu Köln, Köln D-50937, Germany
| | - A Dijon
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | | | - M Girod
- CEA, DAM, DIF, 91297 Arpajon, France
| | - M Hackstein
- Institut für Kernphysik, Universität zu Köln, Köln D-50937, Germany
| | - B Jacquot
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DRF-CNRS/IN2P3, Boulevard Henri Becquerel, 14076 Caen, France
| | - J Libert
- CEA, DAM, DIF, 91297 Arpajon, France
| | - J Litzinger
- Institut für Kernphysik, Universität zu Köln, Köln D-50937, Germany
| | | | - C Louchart
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Gottardo
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - C Michelagnoli
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | | | - D R Napoli
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - T Otsuka
- Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - N Pillet
- CEA, DAM, DIF, 91297 Arpajon, France
| | - F Recchia
- Dipartimento di Fisica e Astronomia "Galileo Galilei", Università degli Studi di Padova and INFN Padova, I-35131 Padova, Italy
| | - W Rother
- Institut für Kernphysik, Universität zu Köln, Köln D-50937, Germany
| | - E Sahin
- Department of Physics, University of Oslo, Oslo N-0316, Norway
| | - S Siem
- Department of Physics, University of Oslo, Oslo N-0316, Norway
| | - B Sulignano
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - T Togashi
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033, Japan
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033, Japan
| | - Ch Theisen
- Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | | |
Collapse
|
7
|
Affiliation(s)
- Y. Tsunoda
- Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Y. Sueoka
- Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Y. Sato
- Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - K. Osuka
- Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
| |
Collapse
|
8
|
Olivier L, Franchoo S, Niikura M, Vajta Z, Sohler D, Doornenbal P, Obertelli A, Tsunoda Y, Otsuka T, Authelet G, Baba H, Calvet D, Château F, Corsi A, Delbart A, Gheller JM, Gillibert A, Isobe T, Lapoux V, Matsushita M, Momiyama S, Motobayashi T, Otsu H, Péron C, Peyaud A, Pollacco EC, Roussé JY, Sakurai H, Santamaria C, Sasano M, Shiga Y, Takeuchi S, Taniuchi R, Uesaka T, Wang H, Yoneda K, Browne F, Chung LX, Dombradi Z, Flavigny F, Giacoppo F, Gottardo A, Hadyńska-Klęk K, Korkulu Z, Koyama S, Kubota Y, Lee J, Lettmann M, Louchart C, Lozeva R, Matsui K, Miyazaki T, Nishimura S, Ogata K, Ota S, Patel Z, Sahin E, Shand C, Söderström PA, Stefan I, Steppenbeck D, Sumikama T, Suzuki D, Werner V, Wu J, Xu Z. Erratum: Persistence of the Z=28 Shell Gap Around ^{78}Ni: First Spectroscopy of ^{79}Cu [Phys. Rev. Lett. 119, 192501 (2017)]. Phys Rev Lett 2018; 121:099902. [PMID: 30230867 DOI: 10.1103/physrevlett.121.099902] [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] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Indexed: 06/08/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.119.192501.
Collapse
|
9
|
Ansari S, Régis JM, Jolie J, Saed-Samii N, Warr N, Korten W, Zielińska M, Salsac MD, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, Simpson G, Drouet F, Vancraeyenest A, de France G, Clément E, Stezowski O, Ur C, Urban W, Regan P, Podolyák Z, Larijani C, Townsley C, Carroll R, Wilson E, Mach H, Fraile L, Paziy V, Olaizola B, Vedia V, Bruce A, Roberts O, Smith J, Scheck M, Kröll T, Hartig AL, Ignatov A, Ilieva S, Lalkovski S, Mărginean N, Otsuka T, Shimizu N, Togashi T, Tsunoda Y. Lifetime measurement in neutron-rich A~100 nuclei. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201819305003] [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
Lifetimes of excited states of the 98;100;102Zr nuclei were measured by using the Generalized Centroid Difference Method. The nuclei of interest were populated via neutron-induced fission of 241Pu and 235U during the EXILL-FATIMA campaign. The obtained lifetimes were used to calculate the B(E2) transition strengths and β deformation parameters which were then compared with the recent theoretical predictions obtained with Monte Carlo Shell Model.
Collapse
|
10
|
Abstract
The quantum self-organization is introduced as one of the major underlying mechanisms of the quantum many-body systems. In the case of atomic nuclei as an example, two types of the motion of nucleons, single-particle states and collective modes, dominate the structure of the nucleus. The collective mode arises as the balance between the effect of the mode-driving force (e.g., quadrupole force for the ellipsoidal deformation) and the resistance power against it. The single-particle energies are one of the sources to produce such resistance power: a coherent collective motion is more hindered by larger spacings between relevant single particle states. Thus, the single-particle state and the collective mode are “enemies” against each other. However, the nuclear forces are rich enough so as to enhance relevant collective mode by reducing the resistance power by changing single-particle energies for each eigenstate through monopole interactions. This will be verified with the concrete example taken from Zr isotopes. Thus, the quantum self-organization occurs: single-particle energies can be self-organized by (i) two quantum liquids, e.g., protons and neutrons, (ii) monopole interaction (to control resistance). In other words, atomic nuclei are not necessarily like simple rigid vases containing almost free nucleons, in contrast to the naïve Fermi liquid picture. Type II shell evolution is considered to be a simple visible case involving excitations across a (sub)magic gap. The quantum self-organization becomes more important in heavier nuclei where the number of active orbits and the number of active nucleons are larger.
Collapse
|
11
|
Olivier L, Franchoo S, Niikura M, Vajta Z, Sohler D, Doornenbal P, Obertelli A, Tsunoda Y, Otsuka T, Authelet G, Baba H, Calvet D, Château F, Corsi A, Delbart A, Gheller JM, Gillibert A, Isobe T, Lapoux V, Matsushita M, Momiyama S, Motobayashi T, Otsu H, Péron C, Peyaud A, Pollacco EC, Roussé JY, Sakurai H, Santamaria C, Sasano M, Shiga Y, Takeuchi S, Taniuchi R, Uesaka T, Wang H, Yoneda K, Browne F, Chung LX, Dombradi Z, Flavigny F, Giacoppo F, Gottardo A, Hadyńska-Klęk K, Korkulu Z, Koyama S, Kubota Y, Lee J, Lettmann M, Louchart C, Lozeva R, Matsui K, Miyazaki T, Nishimura S, Ogata K, Ota S, Patel Z, Sahin E, Shand C, Söderström PA, Stefan I, Steppenbeck D, Sumikama T, Suzuki D, Werner V, Wu J, Xu Z. Persistence of the Z=28 Shell Gap Around ^{78}Ni: First Spectroscopy of ^{79}Cu. Phys Rev Lett 2017; 119:192501. [PMID: 29219515 DOI: 10.1103/physrevlett.119.192501] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Indexed: 06/07/2023]
Abstract
In-beam γ-ray spectroscopy of ^{79}Cu is performed at the Radioactive Isotope Beam Factory of RIKEN. The nucleus of interest is produced through proton knockout from a ^{80}Zn beam at 270 MeV/nucleon. The level scheme up to 4.6 MeV is established for the first time and the results are compared to Monte Carlo shell-model calculations. We do not observe significant knockout feeding to the excited states below 2.2 MeV, which indicates that the Z=28 gap at N=50 remains large. The results show that the ^{79}Cu nucleus can be described in terms of a valence proton outside a ^{78}Ni core, implying the magic character of the latter.
Collapse
Affiliation(s)
- L Olivier
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - S Franchoo
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - M Niikura
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Z Vajta
- MTA Atomki, P.O. Box 51, Debrecen H-4001, Hungary
| | - D Sohler
- MTA Atomki, P.O. Box 51, Debrecen H-4001, Hungary
| | - P Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - A Obertelli
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Otsuka
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - G Authelet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - H Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - D Calvet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - F Château
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Corsi
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Delbart
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J-M Gheller
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Gillibert
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - T Isobe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - V Lapoux
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Matsushita
- Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
| | - S Momiyama
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Motobayashi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Otsu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - C Péron
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Peyaud
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - E C Pollacco
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J-Y Roussé
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - H Sakurai
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - C Santamaria
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Sasano
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Y Shiga
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 172-8501, Japan
| | - S Takeuchi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - R Taniuchi
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Uesaka
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Wang
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - K Yoneda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - F Browne
- School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - L X Chung
- Institute for Nuclear Science & Technology, VINATOM, P.O. Box 5T-160, Nghia Do, Hanoi, Vietnam
| | - Z Dombradi
- MTA Atomki, P.O. Box 51, Debrecen H-4001, Hungary
| | - F Flavigny
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - F Giacoppo
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - A Gottardo
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - K Hadyńska-Klęk
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - Z Korkulu
- MTA Atomki, P.O. Box 51, Debrecen H-4001, Hungary
| | - S Koyama
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Y Kubota
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
| | - J Lee
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
| | - M Lettmann
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - C Louchart
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - R Lozeva
- IPHC, CNRS/IN2P3, Université de Strasbourg, F-67037 Strasbourg, France
| | - K Matsui
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Miyazaki
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Nishimura
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - K Ogata
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan
| | - S Ota
- Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
| | - Z Patel
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - E Sahin
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - C Shand
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P-A Söderström
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - I Stefan
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - D Steppenbeck
- Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
| | - T Sumikama
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - D Suzuki
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - V Werner
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - J Wu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - Z Xu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
| |
Collapse
|
12
|
Taguchi S, Tanabe N, Saeki S, Yuasa T, Ooiwa H, Nakagawa M, Nagatomi C, Nakashima K, Yasumoto A, Ando H, Higa T, Tsunoda Y, Fujikake A, Fukuoka T, Tokui K, Okada Y, Niwa J, Izumi M, Nakao N, Doyu M. Spect findings in Parkinsonian patients: A clinical indicator of antiparkinsonian drug efficacy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2687] [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: 10/18/2022]
|
13
|
Sahin E, Bello Garrote FL, Tsunoda Y, Otsuka T, de Angelis G, Görgen A, Niikura M, Nishimura S, Xu ZY, Baba H, Browne F, Delattre MC, Doornenbal P, Franchoo S, Gey G, Hadyńska-Klȩk K, Isobe T, John PR, Jung HS, Kojouharov I, Kubo T, Kurz N, Li Z, Lorusso G, Matea I, Matsui K, Mengoni D, Morfouace P, Napoli DR, Naqvi F, Nishibata H, Odahara A, Sakurai H, Schaffner H, Söderström PA, Sohler D, Stefan IG, Sumikama T, Suzuki D, Taniuchi R, Taprogge J, Vajta Z, Watanabe H, Werner V, Wu J, Yagi A, Yalcinkaya M, Yoshinaga K. Shell Evolution towards ^{78}Ni: Low-Lying States in ^{77}Cu. Phys Rev Lett 2017; 118:242502. [PMID: 28665637 DOI: 10.1103/physrevlett.118.242502] [Citation(s) in RCA: 3] [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: 01/17/2017] [Indexed: 06/07/2023]
Abstract
The level structure of the neutron-rich ^{77}Cu nucleus is investigated through β-delayed γ-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of ^{77}Ni are produced by in-flight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in ^{77}Cu are identified for the first time by correlating γ rays with the β decay of ^{77}Ni, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near ^{78}Ni and suggests a single-particle nature for both the 5/2_{1}^{-} and 3/2_{1}^{-} states in ^{77}Cu, leading to doubly magic ^{78}Ni.
Collapse
Affiliation(s)
- E Sahin
- Department of Physics, University of Oslo, Oslo 0316, Norway
| | | | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Otsuka
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium
| | - G de Angelis
- Laboratori Nazionali di Legnaro dell'INFN, Legnaro 35020, Italy
| | - A Görgen
- Department of Physics, University of Oslo, Oslo 0316, Norway
| | - M Niikura
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - S Nishimura
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Z Y Xu
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - H Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - F Browne
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - M-C Delattre
- Institut de Physique Nucleaire (IPN), IN2P3-CNRS, Université Paris-Sud 11, F-91406 Orsay Cedex, France
| | - P Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Franchoo
- Institut de Physique Nucleaire (IPN), IN2P3-CNRS, Université Paris-Sud 11, F-91406 Orsay Cedex, France
| | - G Gey
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France
| | - K Hadyńska-Klȩk
- Department of Physics, University of Oslo, Oslo 0316, Norway
- Laboratori Nazionali di Legnaro dell'INFN, Legnaro 35020, Italy
| | - T Isobe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - P R John
- INFN Sezione di Padova and Dipartimento di Fisica e Astronomia, Università di Padova, Padova 35131, Italy
| | - H S Jung
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - I Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - T Kubo
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Z Li
- Department of Physics, Peking University, Beijing 100871, China
| | - G Lorusso
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - I Matea
- Institut de Physique Nucleaire (IPN), IN2P3-CNRS, Université Paris-Sud 11, F-91406 Orsay Cedex, France
| | - K Matsui
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - D Mengoni
- INFN Sezione di Padova and Dipartimento di Fisica e Astronomia, Università di Padova, Padova 35131, Italy
| | - P Morfouace
- Institut de Physique Nucleaire (IPN), IN2P3-CNRS, Université Paris-Sud 11, F-91406 Orsay Cedex, France
| | - D R Napoli
- Laboratori Nazionali di Legnaro dell'INFN, Legnaro 35020, Italy
| | - F Naqvi
- Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120, USA
| | - H Nishibata
- Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - A Odahara
- Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - H Sakurai
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - P-A Söderström
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - D Sohler
- Institute for Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4001, Hungary
| | - I G Stefan
- Institut de Physique Nucleaire (IPN), IN2P3-CNRS, Université Paris-Sud 11, F-91406 Orsay Cedex, France
| | - T Sumikama
- Department of Physics, Tohoku University, 6-3 Aramaki-Aoba, Aoba, Sendai 980-8578, Japan
| | - D Suzuki
- Institut de Physique Nucleaire (IPN), IN2P3-CNRS, Université Paris-Sud 11, F-91406 Orsay Cedex, France
| | - R Taniuchi
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - J Taprogge
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Departamento de Física Teórica, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
- Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
| | - Z Vajta
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Institute for Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4001, Hungary
| | - H Watanabe
- International Research Center for Nuclei and Particles in the Cosmos, Beihang University, Beijing 100191, China
| | - V Werner
- Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120, USA
- Institut für Kernphysik, TU Darmstadt, 64289 Darmstadt, Germany
| | - J Wu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, Peking University, Beijing 100871, China
| | - A Yagi
- Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - M Yalcinkaya
- Department of Physics, Faculty of Science, Istanbul University, Vezneciler/Fatih 34134, Istanbul, Turkey
| | - K Yoshinaga
- Department of Physics, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| |
Collapse
|
14
|
Leoni S, Fornal B, Mărginean N, Sferrazza M, Tsunoda Y, Otsuka T, Bocchi G, Crespi FCL, Bracco A, Aydin S, Boromiza M, Bucurescu D, Cieplicka-Oryǹczak N, Costache C, Călinescu S, Florea N, Ghiţă DG, Glodariu T, Ionescu A, Iskra ŁW, Krzysiek M, Mărginean R, Mihai C, Mihai RE, Mitu A, Negreţ A, Niţă CR, Olăcel A, Oprea A, Pascu S, Petkov P, Petrone C, Porzio G, Şerban A, Sotty C, Stan L, Ştiru I, Stroe L, Şuvăilă R, Toma S, Turturică A, Ujeniuc S, Ur CA. Multifaceted Quadruplet of Low-Lying Spin-Zero States in ^{66}Ni: Emergence of Shape Isomerism in Light Nuclei. Phys Rev Lett 2017; 118:162502. [PMID: 28474931 DOI: 10.1103/physrevlett.118.162502] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Indexed: 06/07/2023]
Abstract
A search for shape isomers in the ^{66}Ni nucleus was performed, following old suggestions of various mean-field models and recent ones, based on state-of-the-art Monte Carlo shell model (MCSM), all considering ^{66}Ni as the lightest nuclear system with shape isomerism. By employing the two-neutron transfer reaction induced by an ^{18}O beam on a ^{64}Ni target, at the sub-Coulomb barrier energy of 39 MeV, all three lowest-excited 0^{+} states in ^{66}Ni were populated and their γ decay was observed by γ-coincidence technique. The 0^{+} states lifetimes were assessed with the plunger method, yielding for the 0_{2}^{+}, 0_{3}^{+}, and 0_{4}^{+} decay to the 2_{1}^{+} state the B(E2) values of 4.3, 0.1, and 0.2 Weisskopf units (W.u.), respectively. MCSM calculations correctly predict the existence of all three excited 0^{+} states, pointing to the oblate, spherical, and prolate nature of the consecutive excitations. In addition, they account for the hindrance of the E2 decay from the prolate 0_{4}^{+} to the spherical 2_{1}^{+} state, although overestimating its value. This result makes ^{66}Ni a unique nuclear system, apart from ^{236,238}U, in which a retarded γ transition from a 0^{+} deformed state to a spherical configuration is observed, resembling a shape-isomerlike behavior.
Collapse
Affiliation(s)
- S Leoni
- Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133, Milano, Italy
| | - B Fornal
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - N Mărginean
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - M Sferrazza
- Département de Physique, Université libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Otsuka
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium
| | - G Bocchi
- Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133, Milano, Italy
| | - F C L Crespi
- Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133, Milano, Italy
| | - A Bracco
- Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133, Milano, Italy
| | - S Aydin
- Department of Physics, University of Aksaray, Adana E-90 Karayolu Üzeri, Aksaray, Turkey
| | - M Boromiza
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
- University of Bucharest, Faculty of Physics, Bucharest-Magurele, 077125, Romania
| | - D Bucurescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - N Cieplicka-Oryǹczak
- INFN sezione di Milano via Celoria 16, 20133, Milano, Italy
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - C Costache
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Călinescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - N Florea
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - D G Ghiţă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - T Glodariu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Ionescu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
- University of Bucharest, Faculty of Physics, Bucharest-Magurele, 077125, Romania
| | - Ł W Iskra
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - M Krzysiek
- Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland
| | - R Mărginean
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - R E Mihai
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Mitu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Negreţ
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C R Niţă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Olăcel
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Oprea
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Pascu
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - P Petkov
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C Petrone
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - G Porzio
- Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy
- INFN sezione di Milano via Celoria 16, 20133, Milano, Italy
| | - A Şerban
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
- University of Bucharest, Faculty of Physics, Bucharest-Magurele, 077125, Romania
| | - C Sotty
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - L Stan
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - I Ştiru
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - L Stroe
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - R Şuvăilă
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Toma
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - A Turturică
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - S Ujeniuc
- Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania
| | - C A Ur
- Extreme Light Infrastructure-Nuclear Physics, IFIN-HH, Bucharest, 077125, Romania
| |
Collapse
|
15
|
Paul N, Corsi A, Obertelli A, Doornenbal P, Authelet G, Baba H, Bally B, Bender M, Calvet D, Château F, Chen S, Delaroche JP, Delbart A, Gheller JM, Giganon A, Gillibert A, Girod M, Heenen PH, Lapoux V, Libert J, Motobayashi T, Niikura M, Otsuka T, Rodríguez TR, Roussé JY, Sakurai H, Santamaria C, Shimizu N, Steppenbeck D, Taniuchi R, Togashi T, Tsunoda Y, Uesaka T, Ando T, Arici T, Blazhev A, Browne F, Bruce AM, Carroll R, Chung LX, Cortés ML, Dewald M, Ding B, Flavigny F, Franchoo S, Górska M, Gottardo A, Jungclaus A, Lee J, Lettmann M, Linh BD, Liu J, Liu Z, Lizarazo C, Momiyama S, Moschner K, Nagamine S, Nakatsuka N, Nita C, Nobs CR, Olivier L, Patel Z, Podolyák Z, Rudigier M, Saito T, Shand C, Söderström PA, Stefan I, Orlandi R, Vaquero V, Werner V, Wimmer K, Xu Z. Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of ^{110}Zr. Phys Rev Lett 2017; 118:032501. [PMID: 28157341 DOI: 10.1103/physrevlett.118.032501] [Citation(s) in RCA: 2] [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: 11/16/2016] [Indexed: 06/06/2023]
Abstract
The first measurement of the low-lying states of the neutron-rich ^{110}Zr and ^{112}Mo was performed via in-beam γ-ray spectroscopy after one proton removal on hydrogen at ∼200 MeV/nucleon. The 2_{1}^{+} excitation energies were found at 185(11) keV in ^{110}Zr, and 235(7) keV in ^{112}Mo, while the R_{42}=E(4_{1}^{+})/E(2_{1}^{+}) ratios are 3.1(2), close to the rigid rotor value, and 2.7(1), respectively. These results are compared to modern energy density functional based configuration mixing models using Gogny and Skyrme effective interactions. We conclude that first levels of ^{110}Zr exhibit a rotational behavior, in agreement with previous observations of lighter zirconium isotopes as well as with the most advanced Monte Carlo shell model predictions. The data, therefore, do not support a harmonic oscillator shell stabilization scenario at Z=40 and N=70. The present data also invalidate predictions for a tetrahedral ground state symmetry in ^{110}Zr.
Collapse
Affiliation(s)
- N Paul
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - A Corsi
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Obertelli
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - P Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - G Authelet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - H Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - B Bally
- ESNT, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Bender
- IPNL, Université de Lyon, Université Lyon 1, CNRS/IN2P3, F-69622 Villeurbanne, France
| | - D Calvet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - F Château
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - S Chen
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | | | - A Delbart
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J-M Gheller
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Giganon
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Gillibert
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - M Girod
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - P-H Heenen
- PNTPM, CP229, Université Libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - V Lapoux
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J Libert
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - T Motobayashi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - M Niikura
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Otsuka
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T R Rodríguez
- Departamento de Física Teorica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - J-Y Roussé
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - H Sakurai
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - C Santamaria
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - N Shimizu
- Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - D Steppenbeck
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - R Taniuchi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Togashi
- Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Uesaka
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Ando
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - T Arici
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - A Blazhev
- Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
| | - F Browne
- School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - A M Bruce
- School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - R Carroll
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - L X Chung
- Institute for Nuclear Science and Technology, VAEI, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - M L Cortés
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - M Dewald
- Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
| | - B Ding
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - F Flavigny
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - S Franchoo
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - M Górska
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A Gottardo
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - J Lee
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
| | - M Lettmann
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - B D Linh
- Institute for Nuclear Science and Technology, VAEI, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - J Liu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
| | - Z Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - C Lizarazo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - S Momiyama
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - K Moschner
- Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
| | - S Nagamine
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - N Nakatsuka
- Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan
| | - C Nita
- Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), RO-077125 Bucharest, Romania
| | - C R Nobs
- School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
| | - L Olivier
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - Z Patel
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Zs Podolyák
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - M Rudigier
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - T Saito
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - C Shand
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P-A Söderström
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - I Stefan
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
| | - R Orlandi
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
| | - V Vaquero
- Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - V Werner
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - K Wimmer
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Z Xu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
| |
Collapse
|
16
|
Kremer C, Aslanidou S, Bassauer S, Hilcker M, Krugmann A, von Neumann-Cosel P, Otsuka T, Pietralla N, Ponomarev VY, Shimizu N, Singer M, Steinhilber G, Togashi T, Tsunoda Y, Werner V, Zweidinger M. First Measurement of Collectivity of Coexisting Shapes Based on Type II Shell Evolution: The Case of ^{96}Zr. Phys Rev Lett 2016; 117:172503. [PMID: 27824471 DOI: 10.1103/physrevlett.117.172503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Type II shell evolution has recently been identified as a microscopic cause for nuclear shape coexistence. PURPOSE Establish a low-lying rotational band in ^{96}Zr. METHODS High-resolution inelastic electron scattering and a relative analysis of transition strengths are used. RESULTS The B(E2;0_{1}^{+}→2_{2}^{+}) value is measured and electromagnetic decay strengths of the 2_{2}^{+} state are deduced. CONCLUSIONS Shape coexistence is established for ^{96}Zr. Type II shell evolution provides a systematic and quantitative mechanism to understand deformation at low excitation energies.
Collapse
Affiliation(s)
- C Kremer
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - S Aslanidou
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - S Bassauer
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - M Hilcker
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - A Krugmann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - P von Neumann-Cosel
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - T Otsuka
- Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium
| | - N Pietralla
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - V Yu Ponomarev
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - N Shimizu
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - M Singer
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - G Steinhilber
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - T Togashi
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Y Tsunoda
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - V Werner
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - M Zweidinger
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| |
Collapse
|
17
|
Sugimoto S, Mizukami T, Ito T, Tsunoda Y, Imamura S, Tamura T, Nagakubo S, Morohoshi Y, Koike Y, Fujita Y, Komatsu H. Endoscopic detorsion for sigmoid volvulus using unsedated water-immersion colonoscopy. Endoscopy 2014; 45 Suppl 2 UCTN:E263-4. [PMID: 24008457 DOI: 10.1055/s-0033-1344567] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- S Sugimoto
- Department of Gastroenterology, Yokohama Municipal Citizens' Hospital, Yokohama, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Kobayashi M, Oshima K, Iwasaki Y, Kumai Y, Tsunoda Y, Kino M, Kobayashi H, Yamashina A, Takazawa K. Central rate pressure product; new marker of cardiac load with exercise. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5648] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
19
|
Tsunoda Y, Tokunaga T, Sugie T, Katsumata M. Production of monozygotic twins following the transfer of bisected embryos in the goats. Theriogenology 2012; 24:337-43. [PMID: 16726087 DOI: 10.1016/0093-691x(85)90225-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/1985] [Accepted: 07/05/1985] [Indexed: 10/26/2022]
Abstract
Embryos at the morula, blastocyst and hatched blastocyst stage were obtained from superovulated and naturally ovulated Japanese native goats. They were bisected into halves with a glass needle, and transferred immediately or after culture (for morula) to recipients. None of five does which received bisected morula became pregnant. Three of nine goats became pregnant after transfer of bisected hatched blastocysts, six of eleven recipients became pregnant. Four of them produced monozygotic twins and the remaining two produced singles. The present study demonstrated that the hatched blastocyst is suitable for bisection in the goat.
Collapse
Affiliation(s)
- Y Tsunoda
- National Institute of Animal Industry, Tsukuba Norindanchi, P.O.Box, Ibaraki, 305 Japan
| | | | | | | |
Collapse
|
20
|
Tsunoda Y, Sakamoto M, Fukma E, Sawada T, Sasaki A, Yamamoto G, Tachikawa T. Gene Expression Profiling in Estorogen Receptor Positive Breast Cancer With Cancer Stem-Like Cells. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32782-4] [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: 10/25/2022] Open
|
21
|
Tsunoda Y, Sakamoto M, Sawada T, Sasaki A, Yamamoto G, Tachikawa T. Characteristic Genes in Luminal Subtype Breast Tumors with CD44+CD24–/Low Gene Expression Signature. Oncology 2011; 81:336-44. [DOI: 10.1159/000334690] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 10/21/2011] [Indexed: 12/21/2022]
|
22
|
Sashiyama H, Tsujinaka Y, Hamahata Y, Tsutsumi O, Hoshino T, Minami Y, Tsunoda Y, Yano M, Sato Y. Primary amelanotic malignant melanoma of the colon. Endoscopy 2010; 42 Suppl 2:E163-4. [PMID: 20556716 DOI: 10.1055/s-0029-1244148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- H Sashiyama
- Department of Coloproctological Surgery, Tsujinaka Hospital Kashiwanoha, Chiba, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Tsunoda A, Nakao K, Watanabe M, Matsui N, Tsunoda Y. Health-related Quality of Life in Patients with Colorectal Cancer Who Receive Oral Uracil and Tegafur plus Leucovorin. Jpn J Clin Oncol 2010; 40:412-419. [DOI: 10.1093/jjco/hyp185] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
|
24
|
Tsunoda Y, Lu H, Takasaka M, Shimomura S, Wakabayashi N. Lattice instability of FeNi and Fe 3Pt Invar alloys. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308086108] [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: 11/10/2022] Open
|
25
|
Kawakami M, Kato Y, Tsunoda Y. The effects of time of first cleavage, developmental stage, and delipidation of nuclear-transferred porcine blastocysts on survival following vitrification. Anim Reprod Sci 2008; 106:402-11. [PMID: 17628361 DOI: 10.1016/j.anireprosci.2007.06.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Revised: 05/21/2007] [Accepted: 06/01/2007] [Indexed: 11/20/2022]
Abstract
The effect of removing cytoplasmic lipid droplets (delipidation) at the 2-cell and developmental stages on the survival of porcine somatic cell nuclear-transferred blastocysts developed from the enucleated oocytes receiving somatic cells from kidney of an adult female after cryopreservation was examined. Vitrification was performed using the Cryoloop method with a small volume of medium (0.5 microl). To select 2-cell embryos with a high potential to develop into blastocysts, the relationship between the timing of the first cleavage and the developmental potential was examined. The potential of nuclear-transferred oocytes to develop into blastocysts in the intermediate-cleavage group (20-24h after activation, 25%) was slightly or significantly (P<0.05) higher than that in fast-cleavage (<20 h after activation, 13%) and slow-cleavage groups (>24h after activation, 5%). Most non-delipidated blastocysts did not survive after thawing (0% for early-stage and 9% for advanced-stage blastocysts), but the survival rate of delipidated blastocysts 48 h after culture (54% and 72%, respectively) was not significantly different from that of non-vitrified blastocysts (80% and 92%, respectively). The survival rate of advanced-stage blastocysts after vitrification was slightly higher than that of early-stage blastocysts. The present study demonstrates that somatic cell nuclear-transferred porcine blastocysts developed from embryos selected at the 2-cell stage can be preserved by vitrification with a small volume of medium if the lipid droplets of the embryos are first removed.
Collapse
Affiliation(s)
- M Kawakami
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara 631-8505, Japan
| | | | | |
Collapse
|
26
|
Ohtani K, Usuda J, Ichinose S, Ishizumi T, Hirata T, Inoue T, Maehara S, Imai K, Kubota M, Tsunoda Y, Yamada M, Tsutsui H, Yamada K, Kuroiwa Y, Furukawa K, Okunaka T, Kato H. High expression of GADD-45α and VEGF induced tumor recurrence via upregulation of IL-2 after photodynamic therapy using NPe6. Int J Oncol 2008. [DOI: 10.3892/ijo.32.2.397] [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: 11/06/2022] Open
|
27
|
Ohtani K, Usuda J, Ichinose S, Ishizumi T, Hirata T, Inoue T, Maehara S, Imai K, Kubota M, Tsunoda Y, Yamada M, Tsutsui H, Yamada K, Kuroiwa Y, Furukawa K, Okunaka T, Kato H. High expression of GADD-45alpha and VEGF induced tumor recurrence via upregulation of IL-2 after photodynamic therapy using NPe6. Int J Oncol 2008; 32:397-403. [PMID: 18202762] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
NPe6 is a novel second-generation photosensitizer used for photodynamic therapy (PDT). PDT using NPe6 and diode laser (664 nm) induces cell death, inflammatory reactions, immunological responses and damage to the microvasculature. In this study, we evaluated the influence of the immunological responses and of enhanced angiogenesis on the anti-tumor effect of NPe6-PDT using cytokine-overexpressing Lewis lung carcinoma (LLC), LLC-IL-2 cells both in vitro and in vivo. We showed by DNA microarray analysis in vitro that IL-2 and GADD-45alpha (growth arrest and DNA damage 45 alpha) mRNA expressions were induced by 3 h after NPe6-PDT applied at a dose killing 90% of the cells (LD90). IL-2-overexpressing cells (LLC/IL-2 cells) were resistant to the loss of clonogenicity as compared to the parental LLC cells in vitro. Furthermore, in female C57BL/6 mice, NPe6-PDT produced a cure rate of 66.7% in LLC tumors, whereas the cure rate was only 16.6% in LLC/IL-2 tumors, and overexpression of IL-2 caused failure of NPe6-PDT, with tumor recurrence, in vivo. These results suggest that IL-2 expression may play an unfavorable role in attenuation of the antitumor effect of NPe6-PDT. It has been reported that the expression of vascular endothelial growth factor (VEGF), in particular, may cause tumor recurrence after PDT and exert unfavorable effect in relation to attenuate the anti-tumor activity of PDT. Results of immunohistochemical analysis of LLC/IL-2 tumors have revealed that the expressions of GADD-45alpha and VEGF are induced in these tumors after PDT, and in particular, 12 h after PDT, the expression levels were much higher as compared with those in the LLC tumors. The results of our studies using in vitro and in vivo models suggest that the cell death caused by PDT was inhibited by induction of GADD-45alpha expression and that tumor recurrence was promoted by the enhancement of VEGF expression mediated by IL-2 upregulation. Therefore, it is speculated that the use of an IL-2 inhibitor may improve the efficacy of NPe6-PDT.
Collapse
Affiliation(s)
- K Ohtani
- Department of Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Okunaka T, Usuda J, Ichinose S, Hirata H, Ohtani K, Maehara S, Inoue T, Imai K, Kubota M, Tsunoda Y, Kuroiwa Y, Tsutsui H, Furukawa K, Nishio K, Kato H. A possible relationship between the anti-cancer potency of photodynamic therapy using the novel photosensitizer ATX-s10-Na(II) and expression of the vascular endothelial growth factor in vivo. Oncol Rep 2007; 18:679-83. [PMID: 17671719 DOI: 10.3892/or.18.3.679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
ATX-s10-Na(II) is a novel second-generation photo-sensitizer for photodynamic therapy (PDT). PDT using ATX-s10 and diode laser (670 nm) induces an apoptotic response, inflammatory reaction, immune reaction and damage to the microvasculature. In particular, the vascular shut-down effect plays an important role in the anti-tumor activity of ATX-s10-PDT. It has been reported that PDT induces hypoxia and expression of the vascular endothelial growth factor (VEGF) via the hypoxia-inducible factor 1 (HIF1)-alpha pathway. We hypothesized that the expression of VEGF may cause tumor recurrence after PDT and exert unfavorable effect against the anti-tumor activity of ATX-s10-PDT. In this study, we showed by DNA microarray analysis in vitro that VEGF mRNA expression was induced 3 h after laser irradiation in ATX-s10-PDT. We compared the anti-tumor activity of ATX-s10-PDT against lung cancer cell lines SBC-3 and SBC-3/VEGF, the latter overexpressing VEGF; there was no significant difference in the sensitivity to the PDT between the two cell lines as assessed by clonogenic assay. Furthermore, no statistically significant difference in the anti-tumor effect of PDT, as measured by tumor cures, was found between SBC-3 and SBC-3/VEGF tumors in female Balb/c-nu/nu nude mice in vivo. In conclusion, ATX-s10-PDT may prevent tumor recurrence despite induction of VEGF and promotion of tumor angiogenesis, which are known to enhance tumor proliferation and survival.
Collapse
Affiliation(s)
- T Okunaka
- Respiratory Disease Center, Sanno Hospital, International University of Health and Welfare, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Shimizu K, Matsubara K, Ohtaki K, Saito O, Awaya T, Asari M, Azumi J, Shiono H, Yoshiyagawa S, Tsunoda Y. Death by intravenous self-injection of Pacoma®, a cationic detergent. Forensic Sci Int 2007. [DOI: 10.1016/j.forsciint.2006.07.025] [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: 10/24/2022]
|
30
|
Usuda J, Ohira T, Suga Y, Oikawa T, Ichinose S, Inoue T, Ohtani K, Maehara S, Imai K, Kubota M, Tsunoda Y, Tsutsui H, Furukawa K, Okunaka T, Sugimoto Y, Kato H. Breast cancer resistance protein (BCRP) affected acquired resistance to gefitinib in a "never-smoked" female patient with advanced non-small cell lung cancer. Lung Cancer 2007; 58:296-9. [PMID: 17618705 DOI: 10.1016/j.lungcan.2007.05.019] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Revised: 05/05/2007] [Accepted: 05/17/2007] [Indexed: 01/29/2023]
Abstract
Development of acquired resistance to gefitinib after an initial good response is common. Recently, it was reported that this acquired resistance is related to a secondary mutation associated with a substitution of threonine by methionine at codon 790 (T790M) of the epidermal growth factor receptor (EGFR) gene. In this report, we present a "never smoking" woman with advanced lung cancer who showed acquired resistance to gefitinib, and analysis of autopsy samples revealed no evidence of EGFR mutations in either exons 18-21 or codon 790, and positive immunostaining for breast cancer resistance protein (BCRP). We describe, for the first time, a case in which expression of BCRP was associated with acquired resistance to gefitinib, independent of EGFR mutations.
Collapse
Affiliation(s)
- J Usuda
- Department of Thoracic Surgery, Tokyo Medical University Hospital, Tokyo 160-0023, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Tsukada K, Miyazaki T, Katoh H, Masuda N, Ojima H, Fukuchi M, Manda R, Fukai Y, Nakajima M, Ishizaki M, Motegi M, Ohsawa H, Mogi A, Okamura A, Tsunoda Y, Sohda M, Ohno T, Moteki T, Sekine Y, Kuwano H. Body fat accumulation and postoperative morbidity in colorectal-cancer surgery. Eur Surg 2005. [DOI: 10.1007/s10353-005-0141-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Kobayashi T, Kato Y, Tsunoda Y. Effect of the timing of the first cleavage on the developmental potential of nuclear-transferred mouse oocytes receiving embryonic stem cells. Theriogenology 2004; 62:854-60. [PMID: 15251237 DOI: 10.1016/j.theriogenology.2003.12.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2003] [Accepted: 12/05/2003] [Indexed: 11/17/2022]
Abstract
The present study examined whether the timing of the first cleavage has an effect on the in vitro and in vivo developmental potential of nuclear-transferred mouse oocytes receiving embryonic stem cells. First, the timing of the first cleavage and the developmental potential of nuclear-transferred oocytes were examined every hour from 12 to 24 h after the start of culture and compared with in vitro-fertilized oocytes. The developmental potential of in vitro-fertilized oocytes decreased gradually according to the time required for cleavage (84% (32/38) for 15 h to 50% (1/2) for 20 h), but intermediate-cleaved (15-16 h) nuclear-transferred oocytes had a higher potential to develop into blastocysts (55% (17/31) to 67% (45/67) versus 0-43% (6/14)]. Second the nuclear-transferred oocytes were divided into three groups according to the timing of the first cleavage; each group was cultured to blastocysts in vitro, and then transferred to recipients. The potential of intermediate-cleaved oocytes (15-16 h) to develop into blastocysts was significantly higher than fast-cleaved (before 15 h) and slow-cleaved (after 16 h) oocytes (65, 46, and 37%). The proportion of fetuses on Day 10.5 of pregnancy was highest in the intermediate-cleaved group (4 versus 2 and 1%, respectively) and a full-term fetus was obtained from this group. The present study demonstrated that the timing of the first cleavage could be used to determine the potential of nuclear-transferred oocytes with embryonic stem cells to develop to the blastocyst stage in vitro, but not to determine post-implantation viability after transfer to recipients.
Collapse
Affiliation(s)
- T Kobayashi
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, 3327-204, Nakamachi, Nara 631-8505, Japan
| | | | | |
Collapse
|
33
|
Matsushita S, Tani T, Kato Y, Tsunoda Y. Effect of low-temperature bovine ovary storage on the maturation rate and developmental potential of follicular oocytes after in vitro fertilization, parthenogenetic activation, or somatic cell nucleus transfer. Anim Reprod Sci 2004; 84:293-301. [PMID: 15302372 DOI: 10.1016/j.anireprosci.2004.02.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2003] [Revised: 01/22/2004] [Accepted: 02/20/2004] [Indexed: 10/26/2022]
Abstract
The present study examined the competence of oocytes from bovine ovaries stored at low temperatures for at least 1 day, which is the necessary time period to complete inspection for bovine spongiform encephalopathy. Storage of ovaries at 10 degrees C for 24 h did not affect oocyte maturation (68% versus 68%) or the potential of oocytes to develop into day 8 blastocysts after in vitro fertilization (25% versus 27%), parthenogenetic activation (19% versus 25%), or somatic cell nucleus transfer (27% versus 32%) compared with controls. In vitro-fertilized and parthenogenetic oocytes from ovaries stored at 10 degrees C for 48 h had a significantly decreased maturation rate and developmental potential, but nucleus-transferred oocytes that received cultured cumulus cells did not (27% versus 32%). Thus, bovine ovaries can be stored at 10 degrees C for at least 24 h without decreasing oocyte maturation competence or the developmental potential of in vitro-fertilized, parthenogenetically activated, and somatic cell nucleus-transferred oocytes, at least to the blastocyst stage. The present study provides valuable information with regard to removing bovine ovaries from abattoirs after testing for bovine spongiform encephalopathy.
Collapse
Affiliation(s)
- S Matsushita
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara 631-8505, Japan
| | | | | | | |
Collapse
|
34
|
Tsukada K, Miyazaki T, Katoh H, Masuda N, Ojima H, Fukuchi M, Manda R, Fukai Y, Nakajima M, Ishizaki M, Motegi M, Ohsawa H, Mogi A, Okamura A, Tsunoda Y, Sohda M, Ohno T, Moteki T, Sekine T, Kuwano H. CT is useful for identifying patients with complicated appendicitis. Dig Liver Dis 2004; 36:195-8. [PMID: 15046189 DOI: 10.1016/j.dld.2003.11.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [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] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS We often come across patients with complicated appendicitis (perforation, abscess formation, or peritonitis) and it is essential to get accurate and detailed information on these patients preoperatively. In this study, we investigated whether or not preoperative computed tomography is useful for identifying these patients. PATIENTS AND METHODS Plain and intravenously-contrasted helical computed tomography was obtained preoperatively in 94 (75%) of 125 patients who underwent appendectomy. Twenty-eight (30%) of the 94 patients had complicated appendicitis (Compli(+) group). We compared clinical factors and computed tomography findings of the Compli(+) group with those of 66 other patients (Compli(-) group). RESULTS There was no significant difference between the Compli(+) and Compli(-) groups in gender, white blood cell count, the present rate of an enlarged appendix, or appendicolith. Fat stranding and free fluid on computed tomography were significantly associated with complicated appendicitis by both univariate and multilogistic regression analysis. Fourteen (70%) of the 20 patients with fat stranding and free fluid on computed tomography had complicated appendicitis and only 1 (4%) of the 28 Compli(+) patients had neither fat stranding nor free fluid on computed tomography. CONCLUSION Our study has indicated that fat stranding and free fluid on computed tomography are significant for complicated appendicitis and helical computed tomography is a powerful tool for identifying patients with complicated appendicitis preoperatively.
Collapse
Affiliation(s)
- K Tsukada
- Department of First Surgery, Gunma University School of Medicine, 3-39-22 Showamachi, Maebashi 371-8511, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Yin XJ, Kato Y, Tsunoda Y. Effect of enucleation procedures and maturation conditions on the development of nuclear-transferred rabbit oocytes receiving male fibroblast cells. Reproduction 2002; 124:41-7. [PMID: 12090917] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Enucleated oocytes matured in vitro, from which chromosomes were removed by treatment with ionomycin and demecolcine, were used as recipient oocytes for nuclear transfer of fibroblast cells from a mature male rabbit. The enucleated oocytes with donor nuclei were electrically activated 2 h after fusion. The potential of nuclear-transferred oocytes matured in vitro and ovulated oocytes to develop into blastocysts was high (33-55%), except for oocytes cultured for 8.0 (19%) and 8.5 h (25%) in vitro. After transfer of nuclear-transferred oocytes to recipients, ten of 62 (16%) and one of eight (13%) recipients that received in vitro-matured and ovulated oocytes, respectively, had 19 (1%) and one (0.6%) implantation sites at the time of laparotomy on days 8-17 after transfer. Four fetuses, including two with beating hearts, were obtained on day 15 of gestation after transfer of nuclear-transferred oocytes matured in vitro. The reason for the low efficiency of fetus production was not clear. One possibility is chromosomal abnormalities of nuclear-transferred oocytes, as most (21 of 22) of the oocytes had chromosomes dispersed along the spindle fibre at the first cell cycle. This is the first report of successful production of fetuses after nuclear transfer of rabbit somatic cells.
Collapse
Affiliation(s)
- X J Yin
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, 3327-204, Nakamachi, Nara, 631-8505, Japan
| | | | | |
Collapse
|
36
|
Yin XJ, Kato Y, Tsunoda Y. Effect of enucleation procedures and maturation conditions on the development of nuclear-transferred rabbit oocytes receiving male fibroblast cells. Reproduction 2002. [DOI: 10.1530/rep.0.1240041] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Enucleated oocytes matured in vitro, from which chromosomes were removed by treatment with ionomycin and demecolcine, were used as recipient oocytes for nuclear transfer of fibroblast cells from a mature male rabbit. The enucleated oocytes with donor nuclei were electrically activated 2 h after fusion. The potential of nuclear-transferred oocytes matured in vitro and ovulated oocytes to develop into blastocysts was high (33-55%), except for oocytes cultured for 8.0 (19%) and 8.5 h (25%) in vitro. After transfer of nuclear-transferred oocytes to recipients, ten of 62 (16%) and one of eight (13%) recipients that received in vitro-matured and ovulated oocytes, respectively, had 19 (1%) and one (0.6%) implantation sites at the time of laparotomy on days 8-17 after transfer. Four fetuses, including two with beating hearts, were obtained on day 15 of gestation after transfer of nuclear-transferred oocytes matured in vitro. The reason for the low efficiency of fetus production was not clear. One possibility is chromosomal abnormalities of nuclear-transferred oocytes, as most (21 of 22) of the oocytes had chromosomes dispersed along the spindle fibre at the first cell cycle. This is the first report of successful production of fetuses after nuclear transfer of rabbit somatic cells.
Collapse
|
37
|
Amano T, Kato Y, Tsunoda Y. The developmental potential of the inner cell mass of blastocysts that were derived from mouse ES cells using nuclear transfer technology. Cell Tissue Res 2002; 307:367-70. [PMID: 11904773 DOI: 10.1007/s00441-002-0513-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2001] [Accepted: 01/02/2002] [Indexed: 10/27/2022]
Abstract
The present study examined the causes of the low developmental potential of enucleated oocytes that have received ES cells and consequent postnatal death of the young. The inner cell masses (ICM) of nuclear-transferred blastocysts or diploid blastocysts were injected into tetraploid blastocysts (group B) or nuclear-transferred tetraploid blastocysts (group C), respectively. The developmental potential of these groups was compared with tetraploid blastocysts injected with ICM of diploid blastocysts (group A). The potential of reconstituted blastocysts to develop into live young in group B increased slightly (5%) but was significantly lower than that in group A (45%). The rate of postnatal death of young in group B did not decrease. The implantation rate of reconstituted blastocysts in group C was very low and no live fetuses were obtained. The results of the present study indicate that the inferior potential of both ICM and trophectoderm cells of nuclear-transferred blastocysts underlies the low developmental rate of nuclear-transferred oocytes receiving ES cells and the higher rate of postnatal death of ES cell-derived young.
Collapse
Affiliation(s)
- T Amano
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, 3327-204, Nakamachi, Nara, 631-8505, Japan
| | | | | |
Collapse
|
38
|
Abstract
It is remarkable that mammalian somatic cell nuclei can form whole individuals if they are transferred to enucleated oocytes. Advancements in nuclear transfer technology can now be applied for genetic improvement and increase of farm animals, rescue of endangered species, and assisted reproduction and tissue engineering in humans. Since July 1998, more than 200 calves have been produced by nuclear transfer of somatic cell nuclei in Japan, but half of them were stillborn or died within several months of parturition. Morphologic abnormalities have also been observed in cloned calves and embryonic stem cell-derived mice. In this review, we discuss the present situation and problems with animal cloning and the possibility for its application to human medicine.
Collapse
Affiliation(s)
- Y Tsunoda
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, 631-8505, Japan.
| | | |
Collapse
|
39
|
Tsunoda Y, Shirata M, Sugimoto W, Liu Z, Terasaki O, Kuroda K, Sugahara Y. Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an Aurivillius phase Bi(2)SrTa(2)O(9) via acid treatment. Inorg Chem 2001; 40:5768-71. [PMID: 11681883 DOI: 10.1021/ic010266m] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An Aurivillius phase, Bi(2)SrTa(2)O(9), which consists of perovskite-like slabs and bismuth oxide sheets, was treated with 3 M hydrochloric acid for 72 h, and the resultant product was characterized. Scanning electron microscopy investigation indicated that no morphological change occurred during the acid treatment. X-ray diffraction (XRD) analysis revealed that the product exhibited tetragonal symmetry with a = 0.391 +/- 0.004 nm and c = 0.98 +/- 0.01 nm, and the a parameter is consistent with a typical value for cubic perovskite oxides. High-resolution electron microscopy (HREM) observations along both [001] and [010] showed that the structure of the perovskite-like slabs in Bi(2)SrTa(2)O(9) was retained after the acid treatment. The compositional analyses revealed the loss of a large portion of bismuth and a part of strontium (present in the bismuth oxide sheets due to B <--> Sr disorder) and the introduction of protons. These observations indicate that the bismuth oxide sheets in Bi(2)SrTa(2)O(9) were selectively leached and that protons were introduced into the interlayer space to form a protonated layered perovskite, H(1.8)[Sr(0.8)Bi(0.2)Ta(2)O(7)]. Though diffraction techniques (XRD and electron diffraction) demonstrated that an average structure of H(1.8)[Sr(0.8)Bi(0.2)Ta(2)O(7)] consisted of perovskite-like slabs stacked without displacement, HREM observation along [010] demonstrated that both a simple stacking sequence without displacement (P-type) and a stacking sequence with a relative displacement by (a + b)/2 (I-type) were present in H(1.8)[Sr(0.8)Bi(0.2)Ta(2)O(7)].
Collapse
Affiliation(s)
- Y Tsunoda
- Department of Applied Chemistry, School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan
| | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
The present study compared the production efficiency and incidence of postnatal death in mice derived by injecting embryonic stem (ES) cells into either heat-treated blastocysts or tetraploid blastocysts. The proportion of completely ES-cell-derived mice from the tetraploid blastocyst group (3.3%) was significantly higher than that obtained from the heat-treated blastocyst group (1.5%). The incidence of postnatal death was the same between the two groups: 10 of 15 young (67%) in the heat-treated group and 21 of 34 young (62%) in the tetraploid group died within 13 days of birth. The remaining young grew to adulthood, had normal fertility, and their germ cells were of ES cell origin. There was no clear correlation, however, between the postnatal lethality of ES-cell-derived mice and the genetic background of the ES cells. The causes of postnatal death are discussed.
Collapse
Affiliation(s)
- T Amano
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, Japan
| | | | | |
Collapse
|
41
|
Abstract
The developmental potential of enucleated mouse oocytes receiving embryonic stem cells from ten lines with either the same or different genetic backgrounds using the cell fusion method was examined in vitro and in vivo. The development of nuclear-transferred oocytes into blastocysts was high (34-88%). However, there was no clear correlation between development into blastocysts after nuclear transfer and the chimaera formation rate of embryonic stem cells. The development into live young was low (1-3%) in all cell lines and 14 of 19 young died shortly after birth. Most of the live young had morphological abnormalities. Of the five remaining mice, two died at days 23 and 30 after birth, but the other three mice are still active at days 359 (mouse 1) and 338 (mice 4 and 5) after birth, with normal fertility. However, the reasons for the abnormalities and postnatal death of embryonic stem cell-derived mice are unknown.
Collapse
Affiliation(s)
- T Amano
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara 631-8505, Japan
| | | | | |
Collapse
|
42
|
Tsunoda Y, Shimizu Y, Tsunoda A, Shibusawa M, Kamiya K, Kusano M, Fukuchi K. Synergistic effect of CGS16949A and 5-fluorouracil on a human breast cancer cell line. Eur Surg Res 2001; 33:232-6. [PMID: 11490127 DOI: 10.1159/000049711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The effects of the aromatase inhibitor, CGS16949A, and the fluoropyrimidine, 5-fluorouracil (5-FU), on cell cycle distribution and growth were studied using FACS analysis and MTT assay in the human breast cancer cell line, SK-BR-3. CGS16949A induced an increase in the G0-G1 fraction on SK-BR-3 cells, and the growth inhibition rate of the combination of both (65.7 +/- 3.0%) was significantly higher than 10 nM CGS16949A (37.9 +/- 6.9%) or 100 microg/ml 5-FU (45.6 +/- 4.5%); p < 0.01). Administering 5-FU after preincubation with CGS16949A significantly increased the combined cytotoxic efficacy, suggesting that clinical therapy using this combined therapy may be more efficient.
Collapse
Affiliation(s)
- Y Tsunoda
- Second Department of Surgery, Showa University School of Medicine, Tokyo, Japan
| | | | | | | | | | | | | |
Collapse
|
43
|
Tsunoda Y, Shimizu Y, Tsunoda A, Kamiya K, Kusano M, Takimoto M. Breast carcinomas with immunocytochemical detection of aromatase in fine-needle aspirates: report of three cases. Hum Pathol 2001; 32:348-51. [PMID: 11274648 DOI: 10.1053/hupa.2001.22746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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] [Indexed: 11/11/2022]
Abstract
Three postmenopausal women with breast carcinoma underwent the fine-needle aspiration (FNA) preoperatively, and these specimens were stained by the antiaromatase antibody. We evaluated the identification of the aromatase immunoreactivity in breast carcinoma specimens obtained from both FNA and surgery. FNA specimens showed positive intracellular immunoreactivity of aromatase in these cases. The presence for aromatase in FNA specimens was identified with that in the surgical specimens. To our knowledge, the present cases are the first to report the aromatase staining of FNA specimens. The immunoreactivity of aromatase in FNA specimen may be useful to estimate the effectiveness of new aromatase inhibitors in patients with breast carcinoma. HUM PATHOL 32:348-351.
Collapse
Affiliation(s)
- Y Tsunoda
- Department of Surgery, School of Medicine, Showa University, Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
44
|
Tsunoda Y, Shimizu Y, Tsunoda A, Kamiya K, Sawada T, Kusano M, Ohta H. Change in serum oestradiol and testosterone concentrations after mastectomy for breast cancer with high aromatase activity. Eur J Surg 2001; 167:234-6. [PMID: 11316415 DOI: 10.1080/110241501750099591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Y Tsunoda
- Second Department of Surgery, School of Medicine, Showa University, Tokyo, Japan
| | | | | | | | | | | | | |
Collapse
|
45
|
Abstract
The in vitro and in vivo developmental potential of nuclear transferred embryos receiving follicular epithelial cells pretreated with spermine (5 and 20 mM), protamine (0.25 and 25 mg/ml), or putrescine (1 and 100 microg/ml) at room and reduced temperatures was examined in the mouse. The pretreated donor cells were first fused with enucleated oocytes, and then nuclei from reconstituted eggs at the two-cell stage were fused with the enucleated fertilized two-cell embryos. The proportion of reconstituted embryos that developed into blastocysts was not significantly different among groups. After transfer to recipients, implantation rates were not different between groups and fetuses were obtained in protamine- and spermine-treated groups as well as in control groups. These results demonstrate that pretreatment of nuclear donor cells with spermine, protamine, or putrescine does not enhance the developmental potential in vitro or in vivo in the mouse. J. Exp. Zool. 289:208-212, 2001.
Collapse
Affiliation(s)
- A Yabuuchi
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, 631-8505, Japan
| | | | | | | |
Collapse
|
46
|
Abstract
Full-term development occurred when nuclei from mouse embryonic stem (ES) cells, synchronized in metaphase with nocodazole, were fused with enucleated oocytes or nuclei of reconstituted eggs and again fused with the enucleated blastomeres of fertilized two-cell embryos using inactivated Sendai virus. Two surviving male mice were derived from undifferentiated ES cell nuclei, one from single nuclear transfer and another from serial nuclear transfer. Both were noticeably small and died within 24 hr of birth for unknown reasons. These findings demonstrate that nuclear transfer of ES cells using the fusion method produces young, as does the piezoelectric-actuated nuclear transfer. J. Exp. Zool. 289:139-145, 2001.
Collapse
Affiliation(s)
- T Amano
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, 3327-204, Nakamachi, Nara, 631-8505, Japan
| | | | | | | |
Collapse
|
47
|
Tani T, Kato Y, Tsunoda Y. Direct exposure of chromosomes to nonactivated ovum cytoplasm is effective for bovine somatic cell nucleus reprogramming. Biol Reprod 2001; 64:324-30. [PMID: 11133690 DOI: 10.1095/biolreprod64.1.324] [Citation(s) in RCA: 133] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
We examined the in vitro developmental potential of nonactivated and activated enucleated ova receiving cumulus cells at various stages of the cell cycle. Eleven to 29% of activated ova receiving donor cells stopped developing at the 8-cell stage but 21% to 50% of nonactivated ova receiving donor cells at either the G(0), G(1), G(2), or M phase, or cycling cells developed into blastocysts. One normal calf was born after transferring five blastocysts that had developed from ova receiving donor cells at the M phase. The present study demonstrated that direct exposure of donor chromosomes to nonactivated ovum cytoplasm is effective for somatic cell nucleus reprogramming, and activated ovum cytoplasm does not reprogram the nucleus.
Collapse
Affiliation(s)
- T Tani
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nakamachi, Nara, 631-8505, Japan
| | | | | |
Collapse
|
48
|
Abstract
The present study determined a suitable parthenogenetic activation procedure for rabbit oocytes and examined the developmental potential of enucleated oocytes receiving cultured cumulus cells. Unfertilized oocytes recovered from superovulated rabbits were activated with one or two sets of electrical pulses, with or without subsequent administration of 6-dimethylaminopurine (6-DMAP). The proportion of oocytes treated with one or two sets of electrical pulses and 6-DMAP that cleaved (87% and 98%, respectively) and developed into blastocysts (77% and 85%, respectively) was significantly higher (P < 0.05) than those activated with electrical pulses alone (30% and 42% for cleavage, 7% and 17% for blastocysts). Cumulus cells separated from ovulated oocytes obtained from mature rabbits were cultured for three to five passages and then induced to quiescence by serum starvation before nuclear transfer. The enucleated oocytes receiving cumulus cells were activated with electrical pulses followed by the addition of 6-DMAP, and cultured in vitro for 5 to 6 d or transferred to pseudopregnant recipient females 1 d after activation. Of 186 nuclear-transferred oocytes, 123 (66%) cleaved and 42 (23%) developed into blastocysts. After transfer of 174 nuclear-transferred oocytes to 8 recipient females, a total of 3 implantation sites were observed in 3 recipient females but no fetuses were obtained.
Collapse
Affiliation(s)
- X J Yin
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, Japan
| | | | | | | |
Collapse
|
49
|
|
50
|
|