摘要
The structure of neutron-rich Ca isotopes is studied in the spherical Skyrme-Hartree-Fock-Bogoliubov(SHFB)approach with SLy5,SLy5+T,and 36 sets of TIJ parametrizations.The calculated results are compared with the available experimental data for the average binding energies,two-neutron separation energies and charge radii.It is found that the SLy5+T,T31,and T32 parametrizations reproduce best the experimental properties,especially the neutron shell effects at N=20,28 and 32,and the recently measured two-neutron separation energy of 56Ca.The calculations with the SLy5+T and T31 parametrizations are extended to isotopes near the neutron drip line.The neutron giant halo structure in the very neutron-rich Ca isotopes is not seen with these two interactions.However,depleted neutron central densities are found in these nuclei.By analyzing the neutron mean-potential,the reason for the bubble-like structure formation is given.
The structure of neutron-rich Ca isotopes is studied in the spherical Skyrme-Hartree-Fock-Bogoliubov（SHFB） approach with SLy5,SLy5+T,and 36 sets of TIJ parametrizations.The calculated results are compared with the available experimental data for the average binding energies,two-neutron separation energies and charge radii.It is found that the SLy5+T,T31,and T32 parametrizations reproduce best the experimental properties,especially the neutron shell effects at N=20,28 and 32,and the recently measured two-neutron separation energy of 56Ca.The calculations with the SLy5+T and T31 parametrizations are extended to isotopes near the neutron drip line.The neutron giant halo structure in the very neutron-rich Ca isotopes is not seen with these two interactions.However,depleted neutron central densities are found in these nuclei.By analyzing the neutron mean-potential,the reason for the bubble-like structure formation is given.
作者
王艳召
苏学斗
亓冲
顾建中
Yan-Zhao Wang;Xue-Dou Su;Chong Qi;Jian-Zhong Gu(Department of Mathematics and Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Institute of Applied Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Department of Physics,Royal Institute of Technology(KTH),SE-10691 Stockholm,Sweden;China Institute of Atomic Energy,P.O.Box 275(10),Beijing 102413,China;School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191,China)
基金
Supported by the National Natural Science Foundation of China(U1832120,11675265)
the State Scholarship Fund of China Scholarship Council(201708130035)
the Natural Science Foundation for Outstanding Young Scholars of Hebei Province of China(A2018210146)
