Data di Pubblicazione:
2015
Citazione:
Particle-Vibration Coupling Effect on the β Decay of Magic Nuclei / Y. Niu, N. Z., G. Colo, V. E.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 114:14(2015 Apr 08).
Abstract:
Nuclear beta 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 beta-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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
approximation algorithms; shell-model; r-process; skyrme interaction; spin-isospin; half-lives; parametrization; fragmentation; excitations; stars; Beta decay; density functionals; half lives; line shape; random phase approximations; skyrme-forces; vibration coupling effects; phase space methods
Elenco autori:
Y. Niu, N. Z., G. Colo, V. E.
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