$\ensuremath{\beta}$-decay properties of neutron-rich rare-earth isotopes

$β$ -decay properties of neutron-rich rare-earth isotopes

P. Sarriguren

Phys. Rev. C 95, 014304 – Published 4 January 2017

Abstract

In this paper, $β$ -decay properties of even-even neutron-rich isotopes in the rare-earth mass region are studied within a microscopic theoretical approach based on a proton-neutron quasiparticle random-phase approximation. The underlying mean field is constructed self-consistently from a deformed Hartree-Fock calculation with Skyrme interactions and pairing correlations to which particle-hole and particle-particle residual interactions are added. Nuclei in this mass region participate in the astrophysical rapid neutron capture process and are directly involved in the generation of the rare-earth peak in the isotopic abundance pattern centered at $A ≃ 160$ . The energy distributions of the Gamow-Teller strength as well as the $β$ -decay half-lives and the $β$ -delayed neutron-emission probabilities are discussed and compared with the available experimental information and with calculations based on different approaches.