The structure of neutron-rich calcium isotopes studied by the shell model with realistic effective interactions  

作　　者：Xiao-Bao Wang Yu-Hang Meng YaTu Guo-Xiang Dong 王小保;孟宇航;图雅;董国香(School of Science,Huzhou University,Huzhou 313000,China;School of Physics Science and Technology,Shenyang Normal University,Shenyang 110034,China)

机构地区：[1]School of Science,Huzhou University,Huzhou 313000,China [2]School of Physics Science and Technology,Shenyang Normal University,Shenyang 110034,China

出　　处：《Chinese Physics C》2019年第12期107-114,共8页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(U1732138,11605054,11505056,11305108,11790325,11847315)

摘　　要：We study the structure of neutron-rich calcium isotopes in the shell model with realistic interactions.The CD-Bonn and Kuo-Brown(KB)interactions are used.As these interactions do not include the three-body force,their direct use leads to poor results.We tested whether the adjustment of the single particle energies(SPEs)would be sufficient to include the three-body correlations empirically.It turns out that the CD-Bonn interaction,after the adjustment of SPEs,gives good agreement with the experimental data for the energies and spectroscopy.For the KB interaction,both the SPEs and monopole terms require adjustments.Thus,the monopole problem is less serious for mod?ern realistic interactions which include perturbations up to the third order.We also tested the effect of the non-central force on the shell structure.It is found that the effect of the tensor force in the CD-Bonn interaction is weaker than in the KB interaction.We study the structure of neutron-rich calcium isotopes in the shell model with realistic interactions.The CD-Bonn and Kuo-Brown(KB) interactions are used.As these interactions do not include the three-body force,their direct use leads to poor results.We tested whether the adjustment of the single particle energies(SPEs) would be sufficient to include the three-body correlations empirically.It turns out that the CD-Bonn interaction,after the adjustment of SPEs,gives good agreement with the experimental data for the energies and spectroscopy.For the KB interaction,both the SPEs and monopole terms require adjustments.Thus,the monopole problem is less serious for mod?ern realistic interactions which include perturbations up to the third order.We also tested the effect of the non-central force on the shell structure.It is found that the effect of the tensor force in the CD-Bonn interaction is weaker than in the KB interaction.

关 键 词：shell model effective interactions TENSOR FORCE THREE-BODY FORCE 

分 类 号：O57[理学—粒子物理与原子核物理]