COMPLETE AND INCOMPLETE MOMENTUM-TRANSFER COMPONENTS IN THE (NAT)SI(O-16,X) REACTION AT 96.4, 112.4, AND 127.8 MEV

Angular distributions and inclusive energy spectra of isotopes with ma sses 23 41 were measured for the reaction (nat)Si(O-16,X) at bombardin g energies of 96.4, 112.4. and 127.8 MeV. Complete and incomplete proj ectile momentum transfer components of the resulting velocity distribu tions were separated by kinematic transforms which rely on an angular distribution function fitted to the data using center-of-mass frame sy mmetry conditions. Characteristics of the extracted complete momentum transfer component spectra, mass distributions, and laboratory frame a ngular distributions are consistent with fusion-evaporation models. Co mparison with the Glas-Mosel parametrization and predictions for the a ngular momentum barrier to fusion indicate that at 112.4 and 127.8 MeV , competing entrance channel processes, rather than compound nucleus f ormation limits, restrict the fusion cross section. Spectra and cross sections of the incomplete momentum transfer component are consistent with sequential two-body breakup/fusion calculations.