Evaporation residue excitation functions for 35Cl induced reactions of 112, 120Sn and 141Pr

Abstract

Evaporation residue excitation functions have been measured for 35Cl ions up to 170 MeV (lab) on targets of 112, 120Sn and 141Pr. These values are combined with previously reported fission excitation functions to give fusion excitation functions. Classical analysis of these results yield fusion barriers and fusion radii. Earlier results are confirmed: as the target atomic number increases the required density penetration at the fusion barrier increases. The percentage of the reaction cross section undergoing fusion monotonically decreases as the targets go from 27Al to 141Pr. The nuclear contribution to the fusion barrier deduced from these measurements is compared with several model predictions and is found to be in satisfactory agreement with the models due to Bass and Krappe and Nix.