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The neutron multiplicity was measured in coincidence with both binary products of the strongly damped collisions of 86 Kr on 166 Kr at 602-MeV beam energy. The measured ratio of the neutron multiplicities for the light and heavy fragments is in good agreement with the corresponding mass ratio for all mass divisions. The observed multiplicities as well as velocity and angular distributions of the neutrons are consistent with statistical-model calculations assuming isotropic evaporation of neutrons from fully accelerated, unpolarized fragments.

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The multiplicities of neutrons emitted from the light and heavy fragments, respectively, in the inelastic scattering of 7.5 MeV/amu 132Xe ions from 197Au have been studied as a function of total energy loss. The measured multiplicity ratios are close to the Au-Xe mass ratio for all Q-values, consistent with a rapid thermalization of the excitation energy. The absolute multiplicity values are lower than expected and suggest significant pre-equilibrium effects.