Abstract
For the reaction 40Ar(10 MeV/u) + natU the number of the emitted neutrons was measured in coincidence with the evaporated light charged particles, the projectilelike fragments and the fission products. In the fission-fragment folding-angle distribution two groups of fission products can be distinguished, originating from peripheral collisions followed by sequential fission and from fission after complete capture. With the neutron multiplicity technique it was possible to distinguish these two fission components at all angles. For the sequential fission part the angular distribution is found to be almost isotropic, whereas the fission after complete capture shows an extreme anisotropic angular distribution, which can be interpreted as an indication for a nonequilibrium or quasi-fission process.
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