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

par Engel, Jonathan;Bender, Michaël ;Dobaczewski, Jacek;Nazarewicz, Witold;Surman, Rebecca A.
Référence Physical review. C. Nuclear physics, 60, 1, 014302
Publication Publié, 1999

Article révisé par les pairs

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Résumé :

β 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-Bogoliubov 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.