Investigations of complete and incomplete fusion in 12C+93Nb and 16O+89Y by recoil range measurements

The recoil range distribution of the radioactive evaporation residues in the reaction of 63 and 77.5 MeV 12C with 93Nb and that of 68 MeV 16O with 89Y have been measured using the recoil catcher technique followed by gamma spectrometry. The linear momentum transfers inferred from these recoil range distributions were used to identify the evaporation residues formed by complete and incomplete fusion mechanisms. The data are compared with Monte Carlo simulation of recoil range distributions of products formed by complete fusion to extract the contribution of incomplete fusion in the individual channels. The observations are discussed in the framework of existing models