FUSION AND BINARY-DECAY MECHANISMS IN THE CL-35-24 SYSTEM AT E(MG)A-APPROXIMATE-TO-8 MEV/

Compound-nucleus fusion and binary-reaction mechanisms have been inves tigated for the Cl-35+Mg-24 system at an incident beam energy of E-lab =282 MeV. Charge distributions, inclusive energy spectra. and angular distributions have been obtained for the evaporation residues and the binary fragments. Angle-integrated cross sections have been determined for evaporation residues from both the complete and incomplete fusion mechanisms. Energy spectra for binary fragment channels near the entr ance-channel mass partition are characterized by an inelastic contribu tion that is in addition to a fully energy damped component. The fully damped component which is observed in all the binary mass channels ca n be associated with decay times that are comparable to, or longer tha n, the rotation period. The observed mass-dependent cross sections for the fully damped component are well reproduced by the fission transit ion-state model, suggesting a fusion followed by fission origin. The p resent data cannot, however, rule out the possibility that a long-live d orbiting mechanism accounts for part or all of this yield.