PAULI FORBIDDEN STATES AND THE ALPHA-14 OPTICAL-POTENTIAL(C)

We investigate the consequences of the requirements of antisymmetrizat ion upon the optical model description of alpha-particle scattering on an open-shell target. As an illustrative example, we carry out a glob al optical model analysis of C-14 elastic scattering data between 22 a nd 54 MeV. We demonstrate the coexistence of a conventional optical po tential with a ''hybrid,'' l-dependent potential which admits unphysic al bound states whose quantum numbers agree with those of the forbidde n states predicted by the resonating group method. We stress the role of the discrete ambiguity in explaining this coexistence, and we inves tigate the properties of a supersymmetric partner of the deep l-indepe ndent potential which agrees with the resonating group prescription.