CORRELATIONS AND THE CROSS-SECTION OF EXCLUSIVE (E,E'P) REACTIONS FORO-16

The reduced cross section for exclusive (e, e'p) reactions has been st udied in DWIA for the example of the nucleus O-16 using a spectral fun ction containing effects of correlations, The spectral function is eva luated directly for the finite nucleus starting from a realistic nucle on-nucleon interaction within the framework of the Green's function ap proach. The emphasis is focused on the correlations induced by excitat ion modes at low energies described within a model-space of shell-mode l configurations including states up to the sdg shell. Cross sections for the p-wave quasi-hole transitions at low missing energies are pres ented and compared with the most recent experimental data. In the case of the so-called perpendicular kinematics the reduced cross section d erived in DWIA shows an enhancement at high missing momenta as compare d to the PWIA result. Furthermore the cross sections for the s- and d- wave quasi hole transitions are presented and compared to available da ta at low missing momenta. Also in these cases, which cannot be descri bed in a model without correlations, a good agreement with the experim ent is obtained. (C) 1997 Published by Elsevier Science B.V.