Gamow-Teller strength distributions and electron capture rates for 55Co and 56Ni

2011/08/02 by Jameel-Un Nabi, Muneeb-ur Rahman · 2 citations
Physics and Astronomy · #nucl-th #astro-ph.SR

paper · pdf · doi:10.1016/j.physletb.2005.02.059

published as Physics Letters B 612 (2005) 190-196 · 10 pages, 6 figures

arxiv created 2011/08/02 · arxiv updated 2015/05/29

Abstract

The Gamow-Teller strength (GT) distributions and electron capture rates on 55Co and 56Ni have been calculated using the proton-neutron quasiparticle random phase approximation theory. We calculate these weak interaction mediated rates over a wide temperature (0.01x109 - 30x109 K) and density (10 - 1011 g cm-3) domain. Electron capture process is one of the essential ingredients involved in the complex dynamics of supernova explosion. Our calculations of electron capture rates show differences with the reported shell model diagonalization approach calculations and are comparatively enhanced at presupernova temperatures. We note that the GT strength is fragmented over many final states.

Cited by

• Expanded calculations of pn-QRPA electron capture rates on ⁵⁵Co for presupernova and supernova physics
• Neutrino cooling rates due to nickel isotopes for presupernova evolution of massive stars