We propose a self-consistent quasiparticle random-phase approximation (QRPA) plus quasiparticle-vibration coupling (QPVC) model with Skyrme interactions to describe the width and the line shape of giant resonances in open-shell nuclei, in which the effect of superfluidity should be taken into account in both the ground state and the excited states. We apply the new model to the Gamow-Teller resonance in the superfluid nucleus Sn120, including both the isoscalar spin-triplet and the isovector spin-singlet pairing interactions. The strength distribution in Sn120 is well reproduced and the underlying microscopic mechanisms, related to QPVC and also to isoscalar pairing, are analyzed in detail.
Quasiparticle random-phase approximation with quasiparticle-vibration coupling : Application to the Gamow-Teller response of the superfluid nucleus Sn 120 / Y.F. Niu, G. Colò, E. Vigezzi, C.L. Bai, H. Sagawa. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 94:6(2016 Dec 26), pp. 064328.064328-1-064328.064328-16. [10.1103/PhysRevC.94.064328]
Quasiparticle random-phase approximation with quasiparticle-vibration coupling : Application to the Gamow-Teller response of the superfluid nucleus Sn 120
G. ColòSecondo
;
2016
Abstract
We propose a self-consistent quasiparticle random-phase approximation (QRPA) plus quasiparticle-vibration coupling (QPVC) model with Skyrme interactions to describe the width and the line shape of giant resonances in open-shell nuclei, in which the effect of superfluidity should be taken into account in both the ground state and the excited states. We apply the new model to the Gamow-Teller resonance in the superfluid nucleus Sn120, including both the isoscalar spin-triplet and the isovector spin-singlet pairing interactions. The strength distribution in Sn120 is well reproduced and the underlying microscopic mechanisms, related to QPVC and also to isoscalar pairing, are analyzed in detail.File | Dimensione | Formato | |
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