Microscopic calculation of the multistep compound process

Abstract

The Feshbach, Kerman, and Koonin [Ann. Phys. (N.Y.) 125, 429 (1980)] model of the statistical multistep compound (MSC) process is calculated microscopically, and comparisons of the microscopically calculated MSC process with a phenomenological phase-space model are made. The microscopic model gives a small particle emission probability in comparison with the constant wave function approximation, and a simple way to reconcile the difference is proposed. A $2p\ensuremath{-}1h$ doorway state formation cross section is calculated with the spherical Nilsson model, and a strength of the residual interaction ${V}_{0}$ is estimated from the doorway state formation cross section. The obtained ${V}_{0}$ is of the same magnitude as those derived in the previous multistep direct analyses. Comparisons of the microscopic MSC calculations with the experimental data show that the calculated particle emission spectra reproduce the measurements at backward angles.