Data di Pubblicazione:
2007
Citazione:
Spin-isospin nuclear response
using the existing microscopic Skyrme functionals / S. Fracasso, G. Colo'. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 76:4(2007), pp. 044307.044307.1-044307.044307.16. [10.1103/PhysRevC.76.044307]
Abstract:
Our paper aims at providing an answer to the question of whether one can reliably describe the properties of the
most important spin-isospin nuclear excitations by using the available nonrelativistic Skyrme energy functionals.
Our method, which has been introduced in a previous publication devoted to the isobaric analog states, is the
self-consistent quasiparticle random-phase approximation (QRPA). The inclusion of pairing is instrumental for
describing a number of experimentally measured spherical systems which are characterized by open shells. We
discuss the effect of isoscalar and isovector pairing correlations. Based on the results for the Gamow-Teller
resonance in 90Zr, 208Pb, and a few Sn isotopes, we draw definite conclusions on the performance of different Skyrme parametrizations, and we suggest improvements for future fits. We also use the spin-dipole resonance as a benchmark of our statements
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
S. Fracasso, G. Colo'
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