Reaction mechanisms in the systemNe20+Ho165: Measurement and analysis of forward recoil range distributions

Abstract

Keeping in view the study of complete and incomplete fusion of heavy ions with a target, the forward recoil range distributions of several evaporation residues produced at 164 MeV $^{20}\mathrm{Ne}$-ion beam energy have been measured for the system $^{20}\mathrm{Ne}+^{165}\mathrm{Ho}$. The recoil catcher activation technique followed by off-line gamma spectroscopy has been employed. Measured forward recoil range distributions of these evaporation residues show evidence of several incomplete fusion channels in addition to complete fusion. The entire and partial linear momentum transfers inferred from these recoil range distributions were used to identify the evaporation residues formed by complete and incomplete fusion mechanisms. The results indicate the occurrence of incomplete fusion involving the breakup of $^{20}\mathrm{Ne}$ into $^{4}\mathrm{He}+^{16}\mathrm{O}$ and/or $^{8}\mathrm{Be}+^{12}\mathrm{C}$ followed by fusion of one of the fragments with target nucleus $^{165}\mathrm{Ho}$. Complete and incomplete fusion reaction channels have been identified in the production of various evaporation residues and an attempt has been made to separate out relative contributions of complete and incomplete fusion components from the analysis of the measured recoil range distribution data. The total contribution of complete and incomplete fusion channels has also been estimated.