Beta-decay rates of r-process nuclei in the relativistic quasiparticle random phase approximation

Details Beta-decay rates of r-process nuclei in the relativistic quasiparticle random phase approximation Beta-decay rates of r-process nuclei in the relativistic quasiparticle random phase approximation

2004-12-08

arxiv.org/abs/nucl-th/0412028v1

Phys.Rev.C71:014308,2005

Physics

Nuclear Physics

Nuclear Theory

28 pages, 12 eps figures, accepted for publication in Physical Review C

Scientific paper

10.1103/PhysRevC.71.014308

The fully consistent relativistic proton-neutron quasiparticle random phase approximation (PN-RQRPA) is employed in the calculation of beta-decay half-lives of neutron-rich nuclei in the N$\approx$50 and N$\approx$82 regions. A new density-dependent effective interaction, with an enhanced value of the nucleon effective mass, is used in relativistic Hartree-Bogoliubov calculation of nuclear ground states and in the particle-hole channel of the PN-RQRPA. The finite range Gogny D1S interaction is employed in the T=1 pairing channel, and the model also includes a proton-neutron particle-particle interaction. The theoretical half-lives reproduce the experimental data for the Fe, Zn, Cd, and Te isotopic chains, but overestimate the lifetimes of Ni isotopes and predict a stable 132Sn.

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