FURTHER ANALYSIS OF O-16-12 ELASTIC-SCATTERING AT E(C)A=38MEV - HOW UNAMBIGUOUS ARE THE POTENTIALS AND PHASE-SHIFTS/

Elastic-scattering measurements on O-16 + C-12 at E/A = 38 MeV were su bjected to extensive optical-model analysis using local, L-independent potentials with either generalized Woods-Saxon or spline radial forms . Despite the good quality of the data and the probable presence of re latively weak absorption, many quite different potentials and their as sociated sets of phase shifts were found to give good fits with chi-sq uared close to unity. One ambiguity, concerning whether the remnant of a primary or a secondary rainbow has been observed, probably could be resolved by extending the measurements to larger angles.