Nuclear viscosity and heavy-ion fusion-fission reactions

Recently measured properties of the pre-scission particle emission from heavy-ion fusion-fission reactions of systems with A∼200 were analysed using the latest version of the statistical model code JOANNE. Simultaneous fits to the multiplicities of pre-scission neutrons, protons and alpha-particles and their mean kinetic energies can be obtained when the deformation dependence of both the particle transmission coefficients and particle binding energies are taken into account. The emission of protons and alpha-particles is found to be suppressed relative to the neutron emission with increasing nuclear deformation. (author). 25 refs., 10 figs., 1 tab