Weak interaction rates of neutron-rich nuclei and the r-process nucleosynthesis -: art. no. 035501

被引:106
作者
Borzov, IN [1 ]
Goriely, S
机构
[1] Inst Phys & Power Engn, State Sci Ctr, Obninsk 249020, Russia
[2] Free Univ Brussels, Inst Astron & Astrophys, B-1050 Brussels, Belgium
来源
PHYSICAL REVIEW C | 2000年 / 62卷 / 03期
关键词
D O I
10.1103/PhysRevC.62.035501
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
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 beta-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 beta-decay properties is described. The large-scale calculations of the beta-strength function for stable and short-lived nuclei are performed to estimate, simultaneously, the beta-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.
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页数:14
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