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Weak interaction rates for Kr and Sr waiting-point nuclei under rp-process conditions

AuthorsSarriguren, Pedro
KeywordsWeak interaction rates
rp process
Quasiparticle random phase approximation
[PACS] β decay; double β decay; electron and muon capture
[PACS] Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations)
[PACS] Explosive burning in accreting binary systems (novae, x-ray bursts)
[PACS] Properties of specific nuclei listed by mass ranges: 59 ≤ A ≤ 89
Issue Date12-Oct-2009
CitationPhysics Letters B 680 (5): 438–442 (2009)
AbstractWeak interaction rates are studied in neutron deficient Kr and Sr waiting-point isotopes in ranges of densities and temperatures relevant for the rp process. The nuclear structure is described within a microscopic model (deformed QRPA) that reproduces not only the half-lives but also the Gamow–Teller strength distributions recently measured. The various sensitivities of the decay rates to both density and temperature are discussed. Continuum electron capture is shown to contribute significantly to the weak rates at rp-process conditions.
Description5 pages, 6 figures.--PACS nrs.:23.40.-s, 21.60.Jz, 26.30.Ca, 27.50.+e.--ArXiv pre-print available at: http://arxiv.org/abs/0910.1021v1
Publisher version (URL)http://dx.doi.org/10.1016/j.physletb.2009.09.046
Appears in Collections:(CFMAC-IEM) Artículos
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