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

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

2011-08-02

arxiv.org/abs/1108.0525v1

Physics Letters B 612 (2005) 190-196

Physics

Nuclear Physics

Nuclear Theory

10 pages, 6 figures

Scientific paper

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.

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