Two-proton radioactivity of exotic nuclei beyond proton drip-line  

作　　者：Yanzhao Wang Jianpo Cui Yonghao Gao Jianzhong Gu 王艳召;崔建坡;高永浩;顾建中(Department of Mathematics and Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Institute of Applied Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;China Institute of Atomic Energy,PO Box 275(10),Beijing 102413,China)

机构地区：[1]Department of Mathematics and Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China [2]Institute of Applied Physics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China [3]China Institute of Atomic Energy,PO Box 275(10),Beijing 102413,China

出　　处：《Communications in Theoretical Physics》2021年第7期81-88,共8页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants No.U1832120 and No.11675265);the Natural Science Foundation for Outstanding Young Scholars of Hebei Province of China(Grants No.A2020210012 and A2018210146);the Continuous Basic Scientific Research Project(Grant No.WDJC-2019-13);the Leading Innovation Project(Grant No.LC 192209000701)。

摘　　要：To search for new candidates of the true and simultaneous two-proton(2 p)radioactivity,the 2 p decay energies(Q2 p)are extracted by the Weizs?cker–Skyrme-4(WS4)model,the finite-range droplet model(FRDM),the Koura–Tachibana–Uno–Yamada(KTUY)model and the Hartree–Fock–Bogoliubov mean-field model with the BSk29 Skyrme interaction(HFB29).Then,the 2 p radioactivity half-lives are calculated within the generalized liquid drop model by inputting the four types of Q2 pvalues.By the energy and half-life constraints,it is found that the probable 2 p decay candidates are the nuclei beyond the proton-drip line in the region of Z≤50 based on the WS4 and KTUY mass models.For the FRDM mass model,the probable 2 p decay candidates are found in the region of Z≤44.However,the 2p-decaying candidates are predicted in the region of Z≤58 by the HFB29 mass model.It means that the probable 2 p decay candidates of Z>50 are only predicted by the HFB29 mass model.Finally,the competition between the true 2p radioactivity andα-decay for the nuclei above the N=Z=50 shell closures is discussed.It is shown that~(101)Te,~(111)Ba and~(114)Ce prefer to 2p radioactivity and the dominant decay mode of~(107)Xe and~(116)Ce isα-decay.

关 键 词：2p radioactivity ALPHA-DECAY decay energies HALF-LIVES GLDM 

分 类 号：O571[理学—粒子物理与原子核物理]