O-16-16 ELASTIC-SCATTERING AT 350-MEV STUDIED BY INVERSION(O)

We have analysed O-16 + O-16 elastic scattering at 350 MeV using a two -step method (S(l) search followed by S(l)-to-V(r) inversion). We have constrained the procedure so that only rather smooth potentials are d etermined. The fits are nevertheless better than others involving dire ct fits of parameterized V(r) to data. We present the results of two i ndependent analyses which both yield V(r) closely resembling the type A potential of Kondo et al. and also folding model V(r) for r greater than or equal to 4 fm. The potentials differ in their range of sensiti vity; for one potential changes in V(r) for r < 3.8 fm have no influen ce whatever on the fit in strong contrast to certain folding model pot entials. The general properties of the real components for both fits c losely resemble folding model predictions. For both potentials, the im aginary component that emerges is remarkably similar to that obtained from a simplified Glauber model. We compare with results of previous t wo-step fit and discuss strengths and dangers of two-step phenomenolog y.