Roles of tensor and isoscalar pairing interactions in β-decay calculations for possible r-process waiting point nuclei with N~82 and 126  

作　　者：C.L.Bai D.L.Fang H.Q.Zhang 白春林;房栋梁;张焕乔(School of physics science and technology,Sichuan University,Chengdu 610065,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science,University of Chinese Academy of Sciences,Beijing 100049,China;China Institute of Atomic Energy,Beijing 10400,China)

机构地区：[1]School of physics science and technology,Sichuan University,Chengdu 610065,China [2]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [3]School of Nuclear Science,University of Chinese Academy of Sciences,Beijing 100049,China [4]China Institute of Atomic Energy,Beijing 10400,China

出　　处：《Chinese Physics C》2022年第11期221-230,共10页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11575120,11822504);Science Specialty Program of Sichuan University(2020SCUNL210)。

摘　　要：In this study,we adopt the self-consistent Hartree-Fock-Bogoliubov(HFB) theory with the proton-neutron quasi-particle random phase approximation(pnQRPA) based on the Skyrme force for calculation of the β^(-) -decay half-lives for nuclei with N~82 and 126 on possible r-process paths.In the calculations,the Skyrme interaction(e.g.,SKO’) is adopted,and the tensor interaction is added self-consistently in both HFB and QRPA calculations.We systematically study how the half-life is changed by varying the strength of the triplet-even(TE) and triplet-odd(TO) components as well as the IS pairing.We find that a variation in strength of the IS pairing of approximately 20% does not produce a substantial effect on β-decay rates with or without the tensor force,while a strength variation of the TO tensor force considerably affects the change in the β-decay half-lives for the very neutron rich N~82 and 126 isotonic chains.In addition,with the inclusion of the tensor force,the GT decay becomes dominant for very neutron-rich nuclei.

关 键 词：nuclear structure weak decay density functional theory 

分 类 号：O571.322[理学—粒子物理与原子核物理]