Complete and incomplete fusion reactions in the C-12+Tm-169

Excitation functions of evaporation residues produced in C-12 + Tm-169 reac tion have been measured at several beam energies in the range of 60-84 MeV using recoil catcher technique followed by off-line gamma-ray spectrometry. Comparison of the experimental excitation functions with those calculated using the statistical model code PACE2 revealed dominance of incomplete fus ion in the cross section of alpha-emission products. Measurement of recoil- range distributions of evaporation residues at 84 MeV beam energy corrobora ted these observations. Analysis of the cross sections of incomplete fusion products showed that these reactions are associated with peripheral collis ions. Comparison of the present data with similar data on O-16 + Ho-165 sys tem revealed that incomplete fusion probability is more in a mass asymmetri c system than in a mass symmetric system. (C) 2000 Elsevier Science B.V. Al l rights reserved.