Energy dependence of fusion cross section for 28Si+12C by evaporation residue measurements

The excitation function for production of evaporation residues from the fusion of 28Si+12C has been studied in two experiments. In the first experiment the γ-ray yields of transitions populating final state evaporation residues were measured, thereby allowing a detailed study of the bombarding energy dependence of the production of specific isotopes. More accurate absolute cross sections for evaporation residue production were measured at several energies with a gas proportional ΔE solid state E telescope. In this manner absolute cross sections were determined against which the γ-ray data could be normalized. The fusion cross section is found to vary smoothly with bombarding energy. Further, absolute cross sections agree well with model predictions currently in vogue