Spin-isospin nuclear response using the existing microscopic Skyrme functionals

Details Spin-isospin nuclear response using the existing microscopic Skyrme functionals Spin-isospin nuclear response using the existing microscopic Skyrme functionals

2007-04-22

arxiv.org/abs/0704.2892v1

Phys.Rev.C76:044307,2007

Physics

Nuclear Physics

Nuclear Theory

Submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.76.044307

Our paper aims at providing an answer to the question whether one can reliably describe the properties of the most important spin-isospin nuclear excitations, by using the available non-relativistic 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 $^{90}$Zr, in $^{208}$Pb and in 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.

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