DIRAC PHENOMENOLOGY FOR P-CA-40 AT INTERMEDIATE ENERGIES

We have analysed p-Ca-40 differential elastic scattering, analysing po wer and spin-rotation function data at 200 and 500 MeV using Dirac opt ional potential and various prescriptions for nucleon density in the t arget. Our results show that the predictions of the spin-rotation func tion are in good agreement with data only at 500 MeV with all target d ensities used here. However, at 200 MeV the spin-rotation function dat a seems to be more sensitive to minor differences in the target densit ies. Our results show that the spin observables are better reproduced by the nine-bottle-bottom shape of the real Schrodinger equivalent pot ential. We have found that the shape of the real potential has an impo rtant effect on the prediction of spin observables especially in the t ransition region.