Spin-isospin nuclear response using the existing microscopic Skyrme functionals

Journal Article · Mon Oct 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.044307· OSTI ID:21067792

Fracasso, S; Colo, G ^[1]

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1. Dipartmento di Fisica, Universita degli Studi and INFN, Sezione di Milano, I-20133 Milano (Italy)

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 {sup 90}Zr, {sup 208}Pb, 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.

• OSTI ID: 21067792
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BENCHMARKS
CORRELATIONS
DIPOLES
EXCITATION
FUNCTIONALS
GAMOW-TELLER RULES
ISOBARIC ANALOGS
ISOSPIN
ISOVECTORS
LEAD 208
NUCLEAR STRUCTURE
RANDOM PHASE APPROXIMATION
RESONANCE
SKYRME POTENTIAL
SPHERICAL CONFIGURATION
SPIN
TIN ISOTOPES
ZIRCONIUM 90