ENERGY-DEPENDENCE OF A LOCAL EQUIVALENT POTENTIAL FOR RGM PHASE-SHIFTS FOR O-16-16(O)

We have found, using the IP inversion method, the local representation of a potential that is S(l) equivalent to the RGM nonlocal potential of Wada and Horiuchi. Phase shifts corresponding to RGM calculations a t laboratory energies 30, 41, 49, 59, 150, 350 and 500 MeV were invert ed and the resulting local potentials compared with the local (but l-d ependent) potentials obtained previously in the WKB-RGM scheme. The pr esent l-independent potentials exhibit a smooth radial variation and s how marked differences from previous results. The energy dependence ar ises from that of the exchange term and from the conversion of the l-d ependence into an additional energy dependence. In particular, we show that the energy dependence of the volume integrals in this energy reg ion is different from earlier WKB-RGM predictions.