arXiv:nucl-th/9801012·v1·Nuclear Theory
Electron capture on iron group nuclei
D.J. Dean(1,2)🇺🇸 · K. Langanke(3)🇩🇰 · L. Chatterjee (1,2,4)🇺🇸 · P.B. Radha (5)🇺🇸 · M.R. Strayer (1) ((1) ORNL, (2) University of Tennessee, (3) Aarhus University, (4) Cumberland University, (5) University of Rochester)🇺🇸
Abstract
We present Gamow-Teller strength distributions from shell model Monte Carlo studies of fp-shell nuclei that may play an important role in the pre-collapse evolution of supernovae. We then use these strength distributions to calculate the electron-capture cross sections and rates in the zero-momentum transfer limit. We also discuss the thermal behavior of the cross sections. We find large differences in these cross sections and rates when compared to the naive single-particle estimates. These differences need to be taken into account for improved modeling of the early stages of type II supernova evolution.