Beta decay of r-process waiting-point nuclei in a self-consistent approach

Details Beta decay of r-process waiting-point nuclei in a self-consistent approach Beta decay of r-process waiting-point nuclei in a self-consistent approach

1999-02-23

arxiv.org/abs/nucl-th/9902059v1

Phys.Rev. C60 (1999) 014302

Physics

Nuclear Physics

Nuclear Theory

14 pages RevTex, 10 eps figures, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.60.014302

Beta-decay rates for spherical neutron-rich r-process waiting-point nuclei are calculated within a fully self-consistent Quasiparticle Random-Phase Approximation, formulated in the Hartree-Fock-Bogolyubov canonical single-particle basis. The same Skyrme force is used everywhere in the calculation except in the proton-neutron particle-particle channel, where a finite-range force is consistently employed. In all but the heaviest nuclei, the resulting half-lives are usually shorter by factors of 2 to 5 than those of calculations that ignore the proton-neutron particle-particle interaction. The shorter half-lives alter predictions for the abundance distribution of r-process elements and for the time it takes to synthesize them.

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