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Negative Parity States in 39Cl Configured by Crossing Major Shell Orbits

         

摘要

Traditional "magic numbers" were once regarded as immutable throughout the nuclear chart.However,unexpected changes were found for unstable nuclei around N =20.With both proton and neutron numbers around the magic number of 20,the neutron-rich 39 Cl isotope provides a good test case for the study of the quantumstate evolution across the major shell.In the present work,the negative parity states in 39Cl are investigated through the β decay spectroscopy of 39S.Newly observed γ transitions together with a new state are assigned into the level scheme of 39 Cl.The spin parity of 5/2-for the lowest negative parity state in 39Cl is reconfirmed using the combined γ transition information.These systematic observations of the negative parity states in 39Cl allow a comprehensive comparison with the theoretical descriptions.The lowest 5/2-state in 39Cl remains exotic in terms of comparisons with existing theoretical calculations and with the neighboring isotopes having similar single-particle configurations.Further experimental and theoretical investigations are suggested.

著录项

  • 来源
    《中国物理快报:英文版》 |2019年第6期|17-20|共4页
  • 作者单位

    School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, Meiji University, 1-1-1 Higashi-Mita, Tama, Kawasaki, Kanagawa 214-8571, Japan;

    School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan;

    Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan;

    Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan;

    Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan;

    School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    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;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, South Korea;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, Osaka University, Machikaneyama 1-1 Toyonaka, Osaka 560-0034, Japan;

    RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

    Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152-8551, Japan;

    Department of Advanced Sciences, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo 184-8584, Japan;

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