摘要
Considering the preformation probability of the two emitted protons in the parent nucleus,we extend the Coulomb and proximity potential model(CPPM)to systematically study two-proton(2p)radioactivity half-lives of the nuclei close to proton drip line.The proximity potential chosen is Prox.81 proposed by Blocki et al.in 1981.Furthermore,we apply this model to predict the half-lives of possible 2p radioactive candidates whose 2p radioactivity is energetically allowed or observed but not yet quantified in the evaluated nuclear properties table NUBASE2016.The predicted results are in good agreement with those from other theoretical models and empirical formulas,namely the effective liquid drop model(ELDM),generalized liquid drop model(GLDM),Gamow-like model,Sreeja formula and Liu formula.
作者
祝德星
刘宏铭
徐杨洋
邹有甜
吴喜军
初鹏程
李小华
De-Xing Zhu;Hong-Ming Liu;Yang-Yang Xu;You-Tian Zou;Xi-Jun Wu;Peng-Cheng Chu;Xiao-Hua Li(School of Nuclear Science and Technology,University of South China,Hengyang 421001,China;National Exemplary Base for International Sci&Tech.Collaboration of Nuclear Energy and Nuclear Safety,University of South China,Hengyang 421001,China;Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment,University of South China,Hengyang 421001,China;School of Math and Physics,University of South China,Hengyang 421001,China;Institute of Theoretical Physics,School of Science,Qingdao Technological University,Qingdao 266000,China)
基金
Supported by the National Natural Science Foundation of China(12175100,11975132)
the Construct Program of the Key Discipline in Hunan Province
the Research Foundation of Education Bureau of Hunan Province,China(18A237)
the Natural Science Foundation of Hunan Province,China(2015JJ3103,2018JJ2321)
the Innovation Group of Nuclear and Particle Physics in USC
the Shandong Province Natural Science Foundation,China(ZR2019YQ01)
Hunan Provincial Innovation Foundation For Postgraduate(CX20210942)
the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment,University of South China(2019KFZ10)。
