title: Particle-vibration coupling effect on the β decay of magic nuclei.
abstract: Nuclear β decay in magic nuclei is investigated, taking into account the coupling between particles and collective vibrations, on top of self-consistent random phase approximation calculations based on Skyrme density functionals. The low-lying Gamow-Teller strength is shifted downwards and at times becomes fragmented; as a consequence, the β-decay half-lives are reduced due to the increase of the phase space available for the decay. In some cases, this leads to a very good agreement between theoretical and experimental lifetimes: this happens, in particular, in the case of the Skyrme force SkM* that can also reproduce the line shape of the high-energy Gamow-Teller resonance as was previously shown.
authors.affiliation: INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy.|Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China.
authors.forename: Y F
authors.initials: YF
authors.lastname: Niu
authors.affiliation: School of Physics and Material Science, Anhui University, Hefei 230601, China.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Niu
authors.affiliation: INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy.|Dipartimento di Fisica, Unversità degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Colò
authors.affiliation: INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Vigezzi