Systematic study of two-proton radioactivity half-lives within the two-potential approach with Skyrme-Hartree-Fock

TL;DR

This study systematically analyzes two-proton radioactivity half-lives using a two-potential approach with Skyrme-Hartree-Fock nuclear potentials, achieving good agreement with experimental data and predicting new candidates.

Contribution

The paper introduces a comprehensive method combining the two-potential approach with Skyrme-Hartree-Fock calculations to accurately predict two-proton radioactivity half-lives and extend predictions to new candidates.

Findings

Standard deviation of 0.701 between calculated and experimental half-lives.

Established a linear relationship between log half-lives and Coulomb parameters.

Predicted half-lives for 15 potential two-proton radioactivity candidates.

Abstract

In this work, we systematically study the two-proton($2p$) radioactivity half-lives using the two-potential approach while the nuclear potential is obtained by using Skyrme-Hartree-Fock approach with the Skyrme effective interaction of {SLy8}. For true $2p$ radioactivity($Q_{2p}$ $>$ 0 and $Q_p$ $< $0, where the $Q_p$ and $Q_{2p}$ are the released energy of the one-proton and two-proton radioactivity), the standard deviation between the experimental half-lives and our theoretical calculations is {0.701}. In addition, we extend this model to predict the half-lives of 15 possible $2p$ radioactivity candidates with $Q_{2p}$ $>$ 0 taken from the evaluated atomic mass table AME2016. The calculated results indicate that a clear linear relationship between the logarithmic $2p$ radioactivity half-lives $\rm{log}_{10}T_{1/2}$ and coulomb parameters [ ($Z_{d}^{0.8}$+$l^{0.25}$)$Q_{2p}^{-1/2}$] considered the effect of orbital angular momentum proposed by Liu $et$ $al$ [Chin. Phys. C \textbf{45}, 024108 (2021)] is also existed. For comparison, the generalized liquid drop model(GLDM), the effective liquid drop model(ELDM) and Gamow-like model are also used. Our predicted results are consistent with the ones obtained by the other models.