ABSTRACT
Light particle-accompanied fission has been extensively studied for spontaneous as well as for induced fission reactions. The reason for this interest was twofold: first, the ternary particles being emitted in space and time close to the scission point were expected to supply information on the scission-point configuration. Second, the ternary fission process turned out to be an important source of helium, tritium, and hydrogen production in nuclear reactors, for which data were requested by the nuclear industry. A clear distinction should be made between absolute and relative emission probabilities. Both methods have in common that the proton number Z of the fissioning system is the dominant factor, which sounds reasonable since the Coulomb forces are expected to play a prominent role in the ternary particle emission. One of the characteristics of the ternary fission process experimentally observed with nuclear emulsions was the almost perpendicular emission of the ternary particles with respect to the fission axis.
