EFFECTIVE INTERACTION IN QUASI-ELASTIC ELECTRON-SCATTERING CALCULATIONS

The transverse nuclear response for quasifree electron scattering is d iscussed. The analysis is done by comparing different calculations per formed in the random-phase approximation and ring approximation framew orks. The importance of the exchange terms in this energy region is in vestigated and the changes in the nuclear responses due to the modific ation of the interaction are evaluated. The calculated quasielastic re sponses show clear indication of their sensibility to the details of t he interaction and this imposes the necessity of a more careful study of the role of the different channels of the interaction in this excit ation region. [S0556-2813(98)00204-0].