Expanded calculations of pn-QRPA electron capture rates on $^{55}$Co for presupernova and supernova physics

TL;DR

This paper provides an expanded set of electron capture rates on $^{55}$Co across a broad temperature-density scale, improving data utility for supernova simulations.

Contribution

It presents the first extensive calculation of $^{55}$Co electron capture rates using pn-QRPA over a wide temperature-density range.

Findings

Expanded electron capture rate data for $^{55}$Co

Applicable for supernova simulation interpolation

Improved accuracy over previous models

Abstract

Due to its abundance and its relatively high capture rates, $^{55}$Co is one of the key nuclide that can control the dynamics of core collapse of a massive star. Previously we introduced our microscopic calculations of capture rates on $^{55}$Co using the proton-neutron quasi-particle random phase approximation (pn-QRPA) theory. Here we present for the first time an expanded calculation of the electron capture rates on $^{55}$Co on an extensive temperature-density scale. These type of scale is appropriate for interpolation purposes and of greater utility for simulation codes.