Abstract
The -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 -decay transitions of nuclei far from stability is developed. Systematic calculations are performed of the allowed and first-forbidden -decay rates for the r-process relevant nuclides near the closed neutron shells at The importance of first-forbidden decays near and near is shown. The total -decay half-lives in the region “east” of the are estimated. A comparison with recent experimental data, global calculations, and self-consistent microscopic predictions is presented.
- Received 26 September 2002
DOI:https://doi.org/10.1103/PhysRevC.67.025802
©2003 American Physical Society