1998/09/01 by K. Langanke, G. Martinez-Pinedo · 3 citations
Physics and Astronomy · #Neutrino Physics Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #astro-ph #nucl-th
paper · pdf · doi:10.1016/s0370-2693(98)00892-2
published as Phys.Lett. B436 (1998) 19-24 · 4 pages, 4 figures, RevTeX 3.1, to appear in Phys. Lett. B
openalex publication_date 1998/09/01 · arxiv created 1998/09/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have calculated the Gamow-Teller strength distributions for the ground states and first excited states in 55Co and 56Ni. These calculations have been performed by shell model diagonalization in the pf shell using the KB3 interaction. The Gamow-Teller distributions are used to calculate the electron capture rates for typical presupernova conditions. Our 55Co rate is noticeably smaller than the presently adopted rate as it is dominated by weak low-lying transitions rather than the strong Gamow-Teller (GT) resonance which is located at a higher excitation energy in the daughter than usually parametrized. Although our 56Ni rate agrees with the presently adopted rate, we do not confirm the conventional parametrization of the GT centroid. Our results support general trends suggested on the basis of shell model Monte Carlo calculations.