Structure and decay properties of spin-dipole giant resonances within a semimicroscopical approach

Abstract

A semimicroscopical approach is applied to calculate: (i) strength functions for the charge-exchange spin-dipole giant resonances in the 208Pb parent nucleus; (ii) partial and total branching ratios for the direct proton decay of the resonance in 208Bi. The approach is based on continuum-RPA calculations of corresponding reaction-amplitudes and phenomenological description of the doorway-state coupling to many-quasiparticle configurations. The only adjustable parameter needed for the description is found by comparison of the calculated and experimental total widths of the resonance. Other model parameters used in calculations are taken from independent data. The calculated total branching ratio is found to be in reasonable agreement with the experimental value.

arXiv comment15 pages, 4 figures, submitted to Phys. Lett. B

References in corpus (2)

• Escape and Spreading Properties of Charge-Exchange Resonances in Bi 208
• On description of the direct nucleon decay of giant resonances

Cited by in corpus (8)

• Direct-decay properties of Giant Resonances
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• Description of double beta decay within continuum-QRPA
• Semimicroscopical description of the simplest photonuclear reactions accompanied by excitation of the giant dipole resonance in medium-heavy mass nuclei
• Structure of isobaric analog states in 91Nb populated by the 90Zr(a,t) reaction
• E1 transitions between spin-dipole and Gamow-Teller giant resonances
• Electromagnetic transitions between giant resonances within a continuum-RPA approach