Effects of nuclear deformation and surface polarization on proton-emission half-lives  

作　　者：Hanlin Wang Zhen Wang Dong Bai Dongdong Ni Zhongzhou Ren 王翰林;王震;柏栋;倪冬冬;任中洲

机构地区：[1]School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [2]College of Mechanics and Engineering Science,Hohai University,Nanjing 211100,China [3]Institute of Science and Technology for Deep Space Exploration,Suzhou Campus,Nanjing University,Suzhou 215163,China [4]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao 999078,China [5]Key Laboratory of Advanced Micro-Structure Materials,Ministry of Education,Shanghai 200092,China

出　　处：《Chinese Physics C》2025年第4期186-198,共13页中国物理C(英文版)

基　　金：Supported by the National Key R&D Program of China(2023YFA1606503);the National Natural Science Foundation of China(12035011,12447114,12022517,11975167);the Postdoctoral Fellowship Program of CPSF(GZB20240560)。

摘　　要：Proton radioactivity is used to investigate the characteristics of unstable neutron-deficient nuclei beyond the proton dripline.Based on the tunneling of one proton through the potential barrier formed by Woods-Saxon plus expanded Coulomb potentials,the half-lives of various proton emitters are calculated using distorted wave Born approximations.In particular,deformation and nuclear surface polarization are considered in our calculation,and their effects on proton-emission half-lives are researched.An analytic formula expressing the relationship between spectroscopic factors and deformation and polarization,which significantly reduces the deviations of calculated half-lives from experimental data,is proposed as well.Moreover,inspired by the new experimental results for the first proton emitter ever discovered,^(53)Co^(m)[L.G.Sarmiento et al.,Nat.Commun.14,5961(2023)],we calculate its two proton-emission branches and interpret the partial half-lives.It is noteworthy that this high-spin isomer has some particular characteristics,including diminutive spectroscopic factors and stronger daughter-proton interactions,that considerably enhance the effects of deformation and polarization.

关 键 词：proton emission proton dripline Gamow model 

分 类 号：O571[理学—粒子物理与原子核物理]