LIGHT-PARTICLE CORRELATIONS WITH EVAPORATION RESIDUES IN THE CA-40-12REACTION AT E(CA-40)=450 MEV(C)

Proton and alpha-particle correlations with evaporation residues were measured over the complete angular range in the interaction of a 450-M eV Ca-40 beam with a C-12 target. Comparisons of the data with predict ions of the statistical model and expectations for complete fusion fro m the kinematics provide clear and consistent evidence of incomplete f usion due to preequilibrium emission of both protons and alpha particl es from the C-12 target. However, there is conflicting evidence both f or and against preequilibrium emission from the projectile.