$\beta$-decay half-lives at finite temperatures for N=82 isotones

TL;DR

This study uses FTQRPA based on finite temperature Skyrme-Hartree-Fock + BCS to analyze how $eta^-$-decay half-lives of N=82 isotones change with temperature, revealing initial decreases and later increases at high temperatures.

Contribution

It introduces a finite temperature QRPA approach to examine temperature effects on $eta$-decay half-lives of N=82 isotones, highlighting the impact of pairing phase transitions.

Findings

Half-lives decrease with temperature initially.

Half-lives increase at high temperatures for open shell nuclei.

Thermal effects are small at r-process relevant temperatures.

Abstract

Using the finite temperature quasi-particle random phase approximation (FTQRPA) on the basis of finite temperature Skyrme-Hartree-Fock + BCS method, we study $\beta^-$-decay half-lives for even-even neutron magic nuclei with N=82 in a finite temperature environment. We find that the $\beta^-$-decay half-life first decreases as the temperature increases for all the nuclei we study, although the thermal effect is found to be small at temperatures relevant to r-process nucleosynthesis. Our calculations indicate that the half-life begins to increase at high temperatures for open shell nuclei. We discuss this behavior in connection to the pairing phase transition.