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Weak interaction rates of neutron-rich nuclei and the r-process nucleosynthesis

par Borzov, Ivan ;Goriely, Stéphane
Référence Physical review. C. Nuclear physics, 62, 3, page (355011-3550114)
Publication Publié, 2000-09

Article révisé par les pairs

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Résumé :

Weak interaction rates for very short-lived neutron-rich nuclides involved in the r process are mostly beyond the experimental reach at the present time. Accurate theoretical predictions demand a coherent extrapolation of different nuclear properties away from the experimentally known regions. The β-decay and neutrino-capture rates are estimated within the extended Thomas-Fermi plus Strutinsky integral method and the continuum quasiparticle random phase approximation. This approximation on the self-consistent calculation of the ground-state and β-decay properties is described. The large-scale calculations of the β-strength function for stable and short-lived nuclei are performed to estimate, simultaneously, the β-decay and electron neutrino capture rates for nuclides of relevance to the r-process nucleosynthesis. A comparison of the results with existing experimental data, global calculations, and self-consistent microscopic predictions is presented. © 2000 The American Physical Society.