Research on two-proton radioactivity in density-dependent cluster model  

作　　者：Ziyi Yuan Dong Bai Zhen Wang Zhongzhou Ren Dongdong Ni 

机构地区：[1]School of Physics Scienceand Engineering,Tongji University,Shanghai 200092,China [2]Collegeof Science,Hohai University,Nanjing211100,China [3]Key Laboratory of Advanced Micro-Structure Materials,Ministry of Education,Shanghai 200092,China [4]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao 9078,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第2期59-67,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 12035011, 12022517, 11975167, 11947211, 11905103,11881240623, and 11961141003);the National Key R&D Program of China(Grant No. 2018YFA0404403);the Science and Technology Development Fund of Macao (Grant No. 0048/2020/A1);the Fundamental Research Funds for the Central Universities (Grant No. 22120200101)。

摘　　要：The density-dependent cluster model(DDCM) provides a unified framework to study α decay,heavy-cluster radioactivity,and proton emission.Two-proton(2p) radioactivity is a rare decay mode of exotic nuclei near or beyond the drip-line.It is of great interest to explore the applicability of DDCM to this exotic decay mode.In this work,DDCM has been extended to study 2p radioactivity.The 2p-radioactivity half-lives are calculated for several known 2p-emitters,including19Mg,45Fe,48Ni,54Zn,and67Kr.The theoretical results are in good agreement with the experimental data,with the standard deviations comparable to or smaller than those given by some other theoretical models and empirical formulas.We also predict the half-lives of a number of possible 2p-emitters with S2p<0 and Sp> 0 using the new data from AME2020 and NUBASE2020.These predictions serve as useful references for future experimental and theoretical investigations on 2p radioactivity.

关 键 词：CLUSTER RADIOACTIVITY DECAY 

分 类 号：O57[理学—粒子物理与原子核物理]