Gamow-Teller response and its spreading mechanism in doubly magic nuclei

Abstract

The scope of the paper is to apply a state-of-the-art beyond mean-field model to the description of the Gamow-Teller response in atomic nuclei. This topic recently attracted considerable renewed interest, due, in particular, to the possibility of performing experiments in unstable nuclei. We study the cases of ${}^{48}$Ca, ${}^{78}$Ni, ${}^{132}$Sn and ${}^{208}$Pb. Our model is based on a fully self-consistent Skyrme Hartree-Fock plus random phase approximation. The same Skyrme interaction is used to calculate the coupling between particles and vibrations, which leads to the mixing of the Gamow-Teller resonance with a set of doorway states and to its fragmentation. We compare our results with available experimental data. The microscopic coupling mechanism is also discussed in some detail.

27 pages, 10 figures

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Cited by in corpus (5)

• Particle-vibration coupling effect on the $\beta$-decay of magic nuclei
• Quasi-particle random phase approximation with quasi-particle-vibration coupling: application to the Gamow-Teller response of the superfluid nucleus ${}^{120}$Sn
• Nuclear response theory with multiphonon coupling in a covariant framework
• Impact of complex many-body correlations on electron capture in thermally excited nuclei around ${}^{78}$Ni
• Theoretical investigation of two-particle two-hole effect on spin-isospin excitations through charge-exchange reactions