Open AccessWeak decay rates for waiting-point nuclei involved in the rp-process
Author(s) -
P. Sarriguren
Publication year - 2012
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/366/1/012039
Subject(s) - physics , beta decay , excited state , double beta decay , neutron , nuclear physics , electron capture , electron , atomic physics , neutrino
We study weak interaction rates under the stellar density and temperature conditions encountered in the rp process. Special attention is paid to neutron-deficient waiting-point nuclei. The nuclear structure part of the problem is described within a deformed Skyrme Hartree-Fock + BCS + QRPA approach, which reproduces not only the beta-decay half-lives but also the available Gamow-Teller strength distributions, measured under terrestrial conditions. The various sensitivities of the decay rates to both density and temperature are discussed. In particular, we study the contributions coming from excited states in the parent nucleus, which are thermally populated, and the competition between beta-decays and continuum electron captures.This work was partially supported by MICINN (Spain) under contract Nos. FIS2008-01301 and FIS2011-23565, as well as by Consolider-Ingenio 2010 Program CPAN CSD2007-00042.Peer Reviewe