Direct-decay properties of charge-exchange spin giant resonances

Abstract

An extended continuum-RPA approach is applied to describe direct-decay properties of spin giant resonances in ${}^{208}$Bi and ${}^{90}$Nb. Partial branching ratios for direct proton decay from these resonances are evaluated. The branching ratio for $\gamma$-decay from the spin-dipole resonance to the Gamow-Teller resonance (main peak) is estimated. The saturation-like behaviour of the mean doorway-state spreading width in ${}^{208}$Pb is discussed in connection with the branching ratio for direct proton decay from the spin-monopole resonance and the Gamow-Teller strength distribution.

6 pages, 2 figures, Talk given at the International Conference on Giant Resonances (GR2000),June 2000, Osaka, Japan

Cited by in corpus (9)

• Overtones of Isoscalar Giant Resonances in medium-heavy and heavy nuclei
• Direct-decay properties of Giant Resonances
• On Properties of the Isoscalar Giant Dipole Resonance
• On the Fermi and Gamow-Teller strength distribution in medium-heavy mass nuclei
• 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
• Semimicroscopical description of the simplest photonuclear reactions accompanied by excitation of the giant dipole resonance in medium-heavy mass nuclei
• Properties of Gamow-Teller and charge-exchange giant spin-monopole resonances in medium-heavy closed-shell parent nuclei: a semi-microscopic description
• Electromagnetic transitions between giant resonances within a continuum-RPA approach