Robustness of N=152 and Z=108 shell closures in superheavy mass region  

作　　者：Buyu Chen Jianmin Dong Yaqian Wang Guoqing Wu 陈布雨;董建敏;王亚乾;吴国庆(Department of Physics,Hebei University,Baoding 071002,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Department of Physics,Hebei University,Baoding 071002,China [2]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2025年第1期1-6,共6页中国物理C(英文版)

基　　金：Supported by the National Natural Science Foundation of China(12222511);the National Key R&D Program of China(2023YFA1606701);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB34000000)。

摘　　要：The neutron shell gap at N=152 has been experimentally confirmed through high-precision mass measurements on nobelium(Z=102)and lawrencium(Z=103)isotopes.The experimental measurements onα-decay properties suggest that deformed doubly-magic nature of ^(270)Hs.However,the magic gaps in the superheavy region are generally expected to be fragile.In this study,we test the robustness of N=152 shell closure in N=152 isotones and Z=108 shell closure in Hs isotopes by employing an alternative approach where both theoretical analysis and available experimental data are required.Combined with existing experimental measurements on a-decay energies,it is determined that robust N=152 neutron shell persists at least in Z=101-105 isotopes,and robust Z=108 proton shell persists in Hs isotopes with N=159,160.Additionally,the relativistic mean-field model is determined as unable to provide N=152 shell.Thus,the conclusion that robust N=152 shell exists at least in Z=101-105 isotopes,provides crucial benchmarks for constraining effective interactions suitable for superheavy nuclei in nuclear energy-density functional theory in future.

关 键 词：superheavy nuclei shell gap a-decay decay energy 

分 类 号：O571[理学—粒子物理与原子核物理]