Quasi-Free Scattering and Nuclear Structure. II.

This complement of an earlier paper [Rev. Mod. Phys. 38, 121 1966] reviews experimental and theoretical progress made since 1965 in the knowledge of quasi-free (p, $2p$) and (e, e^'p) processes in nuclei. Some aspects of the reaction mechanism are considered and a new method to present the experimental data is suggested. The character of the final hole states is discussed. New experimental results are presented and the available information on "hole-spectroscopy" is summarized. Several open problems are pointed out.