2-NUCLEON SPECTRAL-FUNCTION OF O-16 AT HIGH MOMENTA

A procedure for the calculation of the two-body spectral function of a finite nucleus is presented. This spectral function is used to calcul ate the longitudinal part of the O-16(e,e'pp) cross section assuming p lane waves for the outgoing nucleons. Short-range correlation effects are included in the pair-removal amplitudes by adding corresponding de fect wave functions that are obtained from the solution of the Bethe-G oldstone equation in the finite nucleus. The associated G matrix is us ed as the effective interaction in a large but finite model space to c alculate the pair-removal amplitudes in a random-phase approach. The r esulting spectral functions exhibit clear differences between differen t realistic interactions in the momentum range 2-5 fm(-1) for the init ial proton momenta.