Complete and incomplete fusion reactions in12C+89Y:Excitation functions and recoil range measurements

Abstract

Excitation functions and recoil range distributions for radioactive products formed in the reactions of ${}^{12}\mathrm{C}$ on ${}^{89}\mathrm{Y}$ have been measured using catcher foil technique followed by gamma-ray spectrometry. The alpha emission products show higher cross sections than that predicted for complete fusion. Recoil range distributions of evaporation residues indicate incomplete momentum transfer events. Detailed Monte Carlo simulation of the shapes of recoil range distributions for these processes have been carried out using PACE2 code to extract the contributions of incomplete fusion in the individual channels. From the relative yields of incomplete fusion products the excitation energy and angular momentum of the incompletely fused composite nucleus have been deduced. The values agree well with the break-up fusion model of the incomplete fusion.