On the Fermi and Gamow-Teller strength distribution in medium-heavy mass nuclei

Details On the Fermi and Gamow-Teller strength distribution in medium-heavy mass nuclei On the Fermi and Gamow-Teller strength distribution in medium-heavy mass nuclei

2002-01-23

arxiv.org/abs/nucl-th/0201065v2

Phys.Atom.Nucl. 66 (2003) 2128-2142; Yad.Fiz. 66 (2003) 2178-2192

Physics

Nuclear Physics

Nuclear Theory

22 pages, 3 tables, 4 figures, to be published in Physics of Atomic Nuclei

Scientific paper

10.1134/1.1634320

An isospin-selfconsistent approach based on the Continuum-Random-Phase-Approximation (CRPA) is applied to describe the Fermi and Gamow-Teller strength distributions within a wide excitation-energy interval. To take into account nucleon pairing in open-shell nuclei, we formulate an isospin-selfconsistent version of the proton-neutron-quasiparticle-CRPA (pn-QCRPA) approach by incorporating the BCS model into the CRPA method. The isospin and configurational splittings of the Gamow-Teller giant resonance are analyzed in single-open-shell nuclei. The calculation results obtained for $^{208}$Bi, $^{90}$Nb, and Sb isotopes are compared with available experimental data.

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