Probing nuclear dissipation via evaporation residue excitation functions for theO16,18+Pt198reactions

Abstract

Evaporation residue (ER) cross sections for the $^{16,18}\mathrm{O}+^{198}\mathrm{Pt}$ reactions are measured in order to investigate fission hindrance. Compound nuclei ($^{214,216}\mathrm{Rn}$) are formed in the above fusion reactions at excitation energies in the range of 40--68 MeV. The experimental ER cross sections are compared with predictions from the statistical model calculations of compound nuclear decay where Kramers' fission width is used. The strength of nuclear dissipation is treated as a free parameter in the statistical model calculations in order to fit the experimental data.