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arXiv · 1502.04830

Particle-vibration coupling effect on the $β$-decay of magic nuclei

Yifei Niu·Zhongming Niu·Gianluca Colo·Enrico Vigezzi
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Abstract

Nuclear $β$-decay in magic nuclei is investigated, taking into account the coupling between particle 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 it was previously shown.

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Yifei Niu, Zhongming Niu, Gianluca Colo, Enrico Vigezzi. 2015-02-17. Particle-vibration coupling effect on the $β$-decay of magic nuclei. https://doi.org/10.1103/physrevlett.114.142501

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