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

Abstract

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.

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

References in corpus (1)

• Direct-decay properties of charge-exchange spin giant resonances

Cited by in corpus (9)

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• Sensitive behavior of $2\nu \beta \beta$-decay amplitude within QRPA and broken SU(4) symmetry in nuclei
• Description of double beta decay within continuum-QRPA
• Neutron Skin and Giant Resonances in Nuclei
• Relation of isospin-symmetry breaking correction for superallowed beta decay to energy of charge-exchange giant monopole resonance
• First application of the continuum-QRPA to description of the double beta decay
• On Gamow-Teller strength distributions for $\beta \beta$-decaying nuclei within continuum-QRPA
• Gamow-Teller strength distributions for double-beta-decaying nuclei within continuum-QRPA