Fusion-fission dynamics at high excitation energies studied by neutron emission

Neutron emission in coincidence with fusion-fission events and evaporation residues was measured in the heavy-ion reactions ${}_{}{}^{141}{}_{}{}^{}+(316\mathrm{}$ MeV) ${}_{}{}^{40}{}_{}{}^{}$Ar and ${}_{}{}^{175}{}_{}{}^{}$Lu+(192 MeV) ${\mathrm{}}^{12}$C. Both reactions are leading to similar composite systems and excitation energies as the previously investigated reaction ${}_{}{}^{165}{}_{}{}^{}$Ho${+\mathrm{}}^{20}$Ne. In order to determine the lifetimes of the composite systems prior to scission and to study entrance channel and angular-momentum effects, the results for all three systems are compared.