Study of \b{eta}-Decay, log ft Values and Nuclear Structure Properties of Neutron-rich Ge Nuclei

Abstract

We use the relativistic mean field (RMF) model to conduct a thorough analysis of the ground-state properties of ${}^{67\text{–}80}$Ge nuclei. Binding energies and neutron skin thicknesses are computed for a total of 14 neutron-rich Ge isotopes. This study provides a comprehensive overview of the RMF model's explanation of nuclear ground-state properties. Furthermore, we examine the $\log ft$ values of the allowed ${\beta }^{\pm }$ decays and electron/positron capture rates on Ge isotopes in the mass region $A=67\text{–}80$. The proton-neutron quasiparticle random phase approximation (pn-QRPA) method was employed to calculate the $\beta$-decay properties of selected Ge isotopes. The calculated $\log ft$ values show good consistency with the measured data. The predicted $\beta$-decay half-lives are within a factor of 2 of the measured values. For high temperature and density conditions in the core of massive stars, the calculated pn-QRPA stellar rates are up to an order of magnitude larger than the independent shell model rates. The findings reported in this study could be valuable for simulating the late-stage stellar evolution of massive stars.

Comments: 24 Pages, 7 Tables, 5 Figures