Investigation of the relationship between mirror proton radii and neutron-skin thickness  

作　　者：丁梦琦 苏平 方德清 王思敏 Meng-Qi Ding;Ping Su;De-Qing Fang;Si-Min Wang(Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China;Shanghai Research Center for Theoretical Nuclear Physics,NSFC and Fudan University,Shanghai 200438,China)

机构地区：[1]Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China [2]Shanghai Research Center for Theoretical Nuclear Physics,NSFC and Fudan University,Shanghai 200438,China

出　　处：《Chinese Physics C》2023年第9期95-104,共10页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11925502,11935001,11961141003,11890714,12147101);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB34030000);the National Key R&D Program of China(2018YFA0404404)。

摘　　要：Through systematic investigations using the axially deformed solutions of the Skyrme-Hartree-Fock-Bogoliubov equations with 132 sets of Skyrme interaction parameters,it is confirmed that the neutron-skin thickness(Sn)of a neutron-rich nucleus is proportional to the difference between the proton radii of mirror nuclei(R_(p)^(mir)).This indicates that Sn may be deduced from R_(p)^(mir).Compared with the results of the Skyrme-Hartree-Fock model,pairing effects are found to enhance the correlation for most mirror pairs,whereas deformation effects may weaken the correlation.Furthermore,the correlation between Sn and R_(p)^(mir) is studied for isotones with N=20 and N=28,which reveals a stronger linear correlation with increasing|N−Z|.This result demonstrates that it is possible to extract the neutron-skin thickness of an unstable nucleus from the proton radii difference of the mirror nuclei of its isotones.

关 键 词：neutron-skin thickness mirror nuclei Skyrme-Hartree-Fock model equation of state 

分 类 号：O571.5[理学—粒子物理与原子核物理]