Other
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrvc..67b5802b&link_type=abstract
Physical Review C, vol. 67, Issue 2, id. 025802
Other
40
Weak-Interaction And Lepton Aspects, Hartree-Fock And Random-Phase Approximations, Neutrino Scattering, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments
Scientific paper
The β-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 β-decay transitions of nuclei far from stability is developed. Systematic calculations are performed of the allowed and first-forbidden β-decay rates for the r-process relevant nuclides near the closed neutron shells at N=50,82,126. The importance of first-forbidden decays near Z⩾50, N≈82 and near N=126 is shown. The total β-decay half-lives in the region “east” of the 208Pb are estimated. A comparison with recent experimental data, global calculations, and self-consistent microscopic predictions is presented.
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