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Gamow-Teller and first-forbidden decays near the [Formula Presented]-process paths at [Formula Presented] and [Formula Presented]

par Borzov, Ivan
Référence Physical review. C. Nuclear physics, 67, 2, page (14)
Publication Publié, 2003

Article révisé par les pairs

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Résumé :

The [Formula Presented]-decay rates of neutron-rich nuclei relevant to the r-process nucleosynthesis are mostly beyond experimental reach. Their predictions demand a self-consistent extrapolation of various nuclear properties away from the experimentally known regions. The allowed transitions approximation commonly used in large-scale microscopic calculations also needs to be revised in different mass regions. The density functional+continuum QRPA approximation to self-consistent calculations of the ground state properties, Gamow-Teller and first-forbidden [Formula Presented]-decay transitions of nuclei far from stability is developed. Systematic calculations are performed of the allowed and first-forbidden [Formula Presented]-decay rates for the r-process relevant nuclides near the closed neutron shells at [Formula Presented] The importance of first-forbidden decays near [Formula Presented] and near [Formula Presented] is shown. The total [Formula Presented]-decay half-lives in the region “east” of the [Formula Presented] are estimated. A comparison with recent experimental data, global calculations, and self-consistent microscopic predictions is presented. © 2003 The American Physical Society.