Spreading of the Gamow-Teller Resonance in {sup 90}Nb and {sup 208}Bi
1997
Spreading properties of the Gamow-Teller resonance in {sup 90 }Nb and {sup 208}Bi are studied within an approach including the 2p2h configuration mixing and the ground-state correlations beyond the random-phase approximation. The M3Y interaction and single-particle wave functions within the standard harmonic oscillator potential are used in numerical calculations. The single-particle energies around the Fermi surface are replaced with the empirical values or those given by a Woods-Saxon potential. Results obtained provide a reasonable account for recent experimental findings. The extension of the present approach to hot nuclei is also provided. {copyright} {ital 1997} {ital The American Physical Society}
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