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 , including both the isoscalar spin-triplet and the isovector spin-singlet pairing interactions. The strength distribution in is well reproduced and the underlying microscopic mechanisms, related to QPVC and also to isoscalar pairing, are analyzed in detail.
4 More- Received 8 September 2016
- Revised 20 November 2016
DOI:https://doi.org/10.1103/PhysRevC.94.064328
©2016 American Physical Society