Nuclear beta-decay half-lives in the relativistic point-coupling model

摘要

The self-consistent proton-neutron quasiparticle random phase approximation approach is employed to calculate beta-decay half-lives of neutron-rich even-even nuclei with 8 <= Z <= 30. A newly proposed nonlinear point-coupling-effective interaction PC-PK1 is used in the calculations. It is found that the isoscalar proton-neutron pairing interaction can significantly reduce beta-decay half-lives. With an isospin-dependent isoscalar proton-neutron pairing strength, our results well reproduce the experimental beta-decay half-lives, although the pairing strength is not adjusted using the half-lives calculated in this study.