Strongly screening electron capture rates of chromium isotopes in presupernova

TL;DR

This paper investigates how strong electron screening affects electron capture rates of chromium isotopes in presupernova conditions, revealing significant rate reductions that impact supernova modeling.

Contribution

It introduces a combined use of Shell-Model Monte Carlo and RPA theories with linear response screening to evaluate electron capture rates under strong screening effects.

Findings

Electron capture rates decrease by about 40% under strong screening.

Strong screening effects are significant for supernova simulations.

Results aid in understanding supernova explosion mechanisms.

Abstract

Taking into account the effect of electron screening on the electron energy and electron capture threshold energy, by using the method of Shell-Model Monte Carlo and Random Phase Approximation theory, we investigate the strong electron screening capture rates of chromium isotopes according to the linear response theory screening model. The strong screening rates can decrease by about 40.43\% (e.g., for $^{60}$Cr at $T_9=3.44,Y_e=0.43$). Our conclusions may be helpful to the researches of supernova explosion and numerical simulation.