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Advances in High Energy Physics
Volume 2015, Article ID 398796, 11 pages
http://dx.doi.org/10.1155/2015/398796
Research Article

Electron Capture Cross Sections for Stellar Nucleosynthesis

Division of Theoretical Physics, University of Ioannina, 45100 Ioannina, Greece

Received 11 July 2014; Accepted 8 October 2014

Academic Editor: Athanasios Hatzikoutelis

Copyright © 2015 P. G. Giannaka and T. S. Kosmas. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

In the first stage of this work, we perform detailed calculations for the cross sections of the electron capture on nuclei under laboratory conditions. Towards this aim we exploit the advantages of a refined version of the proton-neutron quasiparticle random-phase approximation (pn-QRPA) and carry out state-by-state evaluations of the rates of exclusive processes that lead to any of the accessible transitions within the chosen model space. In the second stage of our present study, we translate the abovementioned -capture cross sections to the stellar environment ones by inserting the temperature dependence through a Maxwell-Boltzmann distribution describing the stellar electron gas. As a concrete nuclear target we use the 66Zn isotope, which belongs to the iron group nuclei and plays prominent role in stellar nucleosynthesis at core collapse supernovae environment.