COMPLETE AND INCOMPLETE FUSION IN THE SI-28-12, C-13 REACTIONS AROUND5 MEV NUCLEON(C)

Velocity spectra, angular, and mass distributions of the evaporation r esidues produced in the reaction Si-28+C-12 at E(Si-28) = 104, 115, an d 154 MeV have been measured in the angular range 2.5-degrees less-tha n-or-equal-to curly theta(L) less-than-or-equal-to 14-degrees. The res ults show for all the studied bombarding energies the presence of smal l contributions of incomplete fusion reactions. These small incomplete fusion components present in the evaporation-residue cross sections a ppear to be due to a cluster transfer reaction mechanism. Similar resu lts have been obtained bombarding a C-13 target. The obtained results are compared with earlier measurements and the predictions of some exi sting models.