Systematic study of two-proton radioactivity half-lives using two-potential approach with different Skyrme interactions

• Published in: International journal of modern physics. E, Nuclear physics Vol. 31; no. 5
• Main Authors: Pan, Xiao, Zou, You-Tian, He, Biao, Li, Xiao-Hua, Wu, Xi-Jun, Zhang, Zhen
• Format: Journal Article
• Language: English
• Published: Singapore World Scientific Publishing Company 01.05.2022; World Scientific Publishing Co. Pte., Ltd
• Subjects: Density functional theory; Drops (liquids); Half-life; Nuclear potential; Protons; Radioactivity; Research Article; Skyrme energy density functional theory; Skz4 Skyrme interaction; Two-potential approach; two-proton radioactivity
• ISSN: 0218-3013; 1793-6608
• DOI: 10.1142/S0218301322500513

In this work, based on the two-potential approach, we systematically study the true two-proton( 2 p ) radioactivity ( Q 2 p > 0 and Q p < 0 , where the Q 2 p and Q p are the released energies corresponding to the two-proton and one-proton radioactivity) half-lives of nuclei near or beyond the proton drip line while the nuclear potential is obtained by using Skyrme energy density functional theory. The influence of 115 different versions of the Skyrme interactions on 2p radioactivity half-lives was systematically compared. The calculated results indicate that Skz4 Skyrme interaction gives the lowest r.m.s. deviation between the experimental half-lives and calculated ones. Moreover, we extend this model with Skz4 Skyrme interaction to predict the half-lives of 42 possible 2p radioactivity candidates whose 2p radioactivity is energetically allowed or observed but not yet quantified in NUBASE2020.The predicted results are in agreement with those obtained by using the generalized liquid drop model, the unified fission model and Gamow-like model.