DISPERSIVE CORRECTION TO THE P-16 OPTICAL-MODEL AND THE EFFECTIVE NUCLEON-NUCLEON POTENTIAL(O)

We show, for p+O-16 scattering in the energy range of 23.4 to 52.5 MeV , that taking dispersion relations into account in a single-channel re sonating-group model description requires a modification of the parame ters of the effective nucleon-nucleon force. Adding the polarization p otential calculated from the dispersion relation to the equivalent loc al potential of the resonating group nonlocal interaction gives a subs tantially better fit to the elastic-scattering cross section data, com pared with previous comparable phenomenological analyses, and this est ablishes the usefulness and validity of the dispersion-relation analys is.