Overlap Functions in Correlation Methods and Quasifree Nucleon Knockout

The cross sections of the (e,e'N) and (g ,p) reactions on 16O are calculated, for the transitions to the 1/2+ ground state and the first 3/2+ excited state of the residual nucleus, using single-particle overlap functions obtained on the basis of one-body density matrices within different correlation methods. The electron-induced one-nucleon knockout reaction is treated within a nonrelativistic distorted wave impulse approximation framework. The theoretical treatment of the (g ,p) reaction includes both contributions of the direct knockout mechanism and of meson-exchange currents. The results are sensitive to details of the different overlap functions. The consistent analysis of the reaction cross sections and the comparison with the experimental datamake it possible to study the nucleon-nucleon correlation effects.