Calculations of the β-decay half-lives of neutron-rich nuclei

Abstract

The β-decay half-lives of neutron-rich nuclei have been systematically investigated using the proton–neutron quasiparticle random-phase approximation (pnQRPA) with a δ-form Gamow–Teller residual interaction. The particle–hole and particle–particle components of the Gamow–Teller residual interaction are consistently taken into account in dealing with the pnQRPA matrix equation, and the dependence of the results on them is discussed. Even–even nuclei with atomic numbers Z = 6–58 are considered in the calculations, where some newly measured neutron-rich nuclei are included. The calculated β−-decay half-lives are found to be in good agreement with the available experimental data. The comparison with other theoretical results is also given. Moreover, predictions on β-decay half-lives are made for some extremely neutron-rich nuclei, which could be useful for future experiments.