Lepton capture rates due to isotopes of vanadium in astrophysical environment
Abstract
Lepton (electron and positron) capture rates on iron-regime nuclei are an essential element for modeling the late stages in the evolution of massive stars that end as core-collapse and thermonuclear supernovae. Previous simulation studies suggest that lepton capture (LC) rates on isotopes of vanadium have a substantial effect in regulating the electron fraction (Ye) during the final evolutionary phases. The present work involves the calculation of LC rates for 22 isotopes of vanadium using the proton-neutron quasiparticle random phase approximation (pn-QRPA) model. The considered mass range is from A = 43 to 64. The LC rates are computed over stellar densities ranging from 10^1 to 10^11 g/cm^3 and temperatures in the range 10^7 to 3 x 10^10 K. A comparison of our LC rates with those obtained using other models (IPM and LSSM) is also presented. Compared to other models, the pn-QRPA rates at high temperature (3 x 10^10 K) are larger by 1-2 orders of magnitude.
Keywords
Cite
@article{arxiv.2504.09212,
title = {Lepton capture rates due to isotopes of vanadium in astrophysical environment},
author = {Ramoona Shehzadi and Jameel-Un Nabi and Fakeha Farooq},
journal= {arXiv preprint arXiv:2504.09212},
year = {2025}
}
Comments
11 Pages, 2 Figures, 6 Tables