Escape and Spreading Properties of Charge-Exchange Resonances in Bi 208

Abstract

The properties of charge-exchange excitations of ${}^{208}$Pb with $\Delta L=0$, i.e., the isobaric analog and Gamow-Teller resonances, are studied within a self-consistent model making use of an effective force of the Skyrme type. The well-known isobaric analog case is used to assess the reliability of the model. The calculated properties of the Gamow-Teller resonance are compared with recent experimental measurements with the aim of better understanding the microscopic structure of this mode.

Comments: 26 pages including references, figure captions and tables. Figures are available upon request at COLO@IPNVAX.IN2P3.FR (decnet 32858::COLO). Preprint code: IPNO/TH 94-22