EFFECTIVE POTENTIALS AND THRESHOLD ANOMALY

The strong E and L dependence of the effective elastic channel potenti als is shown to be an implicit radial kinetic energy (E) dependence. I t is also shown that this effective potential satisfies the dispersion relation in E variable at the strong absorption radius. Further, the experimental data for both elastic and fusion channels are consistent with this L-dependence of the corresponding effective potentials. The effective transfer channel potentials derived using CRC code FRESCO ar e shown to exhibit strong energy dependence as a result of couplings. The energy dependence of effective transfer strength for O-16 + Pb-208 and O-16 + Th-232 systems is determined using the experimental transf er angular distributions.