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. Colò
Secondo
;
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.
nuclear and high energy physics
Settore FIS/04 - Fisica Nucleare e Subnucleare
European Nuclear Science and Application Research 2
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/499234
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