학술논문
Proton Shell Evolution below ^{132}Sn: First Measurement of Low-Lying β-Emitting Isomers in ^{123,125}Ag.
Document Type
Academic Journal
Author
Chen ZQ; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Li ZH; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Hua H; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Watanabe H; IRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China.; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Yuan CX; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, 519082, Guangdong, China.; Zhang SQ; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Lorusso G; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; National Physical Laboratory, NPL, Teddington, Middlesex TW11 0LW, United Kingdom.; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.; Nishimura S; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Baba H; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Browne F; 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.; Benzoni G; INFN, Sezione di Milano, via Celoria 16, I-20133 Milano, Italy.; Chae KY; Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea.; Crespi FCL; INFN, Sezione di Milano, via Celoria 16, I-20133 Milano, Italy.; Dipartimento di Fisica, Universitá di Milano, via Celoria 16, I-20133 Milano, Italy.; Doornenbal P; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Fukuda N; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Gey G; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France.; Institut Laue-Langevin, B.P. 156, F-38042 Grenoble Cedex 9, France.; Gernhäuser R; Physik Department, Technische Universität München, D-85748 Garching, Germany.; Inabe N; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Isobe T; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Jiang DX; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Jungclaus A; Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain.; Jung HS; Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea.; Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA.; Jin Y; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Kameda D; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Kim GD; Rare Isotope Science Project, Institute for Basic Science, Daejeon 305-811, Republic of Korea.; Kim YK; Rare Isotope Science Project, Institute for Basic Science, Daejeon 305-811, Republic of Korea.; Department of Nuclear Engineering, Hanyang University, Seoul 133-791, Republic of Korea.; Kojouharov I; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.; Kondev FG; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.; Kubo T; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Kurz N; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.; Kwon YK; Rare Isotope Science Project, Institute for Basic Science, Daejeon 305-811, Republic of Korea.; Li XQ; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Lou JL; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Lane GJ; Department of Nuclear Physics, R.S.P.E., Australian National University, Canberra, Australian Capital Territory 0200, Australia.; Li CG; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Luo DW; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Montaner-Pizá A; IFIC, CSIC-Universidad de Valencia, A.C. 22085, E 46071, Valencia, Spain.; Moschner K; Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany.; Niu CY; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Naqvi F; Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120, USA.; Niikura M; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan.; Nishibata H; Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan.; Odahara A; Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan.; Orlandi R; Instituut voor Kern en Stralingsfysica, KU Leuven, University of Leuven, B-3001 Leuven, Belgium.; Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan.; Patel Z; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.; Podolyák Z; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.; Sumikama T; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Söderström PA; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Sakurai H; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Schaffner H; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.; Simpson GS; LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex, France.; Steiger K; Physik Department, Technische Universität München, D-85748 Garching, Germany.; Suzuki H; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Taprogge J; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain.; Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.; Takeda H; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; Vajta Z; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.; MTA Atomki, P.O. Box 51, Debrecen, H-4001, Hungary.; Wang HK; College of Physics and Telecommunication Engineering, Zhoukou Normal University, Henan 466000, People's Republic of China.; Wu J; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.; Wendt A; Institut für Kernphysik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany.; Wang CG; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Wu HY; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Wang X; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Wu CG; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Xu C; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Xu ZY; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan.; Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong.; Yagi A; Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka 560-0043 Toyonaka, Japan.; Ye YL; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.; Yoshinaga K; Department of Physics, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan.
Source
Publisher: American Physical Society Country of Publication: United States NLM ID: 0401141 Publication Model: Print Cited Medium: Internet ISSN: 1079-7114 (Electronic) Linking ISSN: 00319007 NLM ISO Abbreviation: Phys Rev Lett Subsets: PubMed not MEDLINE
Subject
Language
English
Abstract
The β-delayed γ-ray spectroscopy of neutron-rich ^{123,125}Ag isotopes is investigated at the Radioactive Isotope Beam Factory of RIKEN, and the long-predicted 1/2^{-} β-emitting isomers in ^{123,125}Ag are identified for the first time. With the new experimental results, the systematic trend of energy spacing between the lowest 9/2^{+} and 1/2^{-} levels is extended in Ag isotopes up to N=78, providing a clear signal for the reduction of the Z=40 subshell gap in Ag towards N=82. Shell-model calculations with the state-of-the-art V_{MU} plus M3Y spin-orbit interaction give a satisfactory description of the low-lying states in ^{123,125}Ag. The tensor force is found to play a crucial role in the evolution of the size of the Z=40 subshell gap. The observed inversion of the single-particle levels around ^{123}Ag can be well interpreted in terms of the monopole shift of the π1g_{9/2} orbitals mainly caused by the increasing occupation of ν1h_{11/2} orbitals.