KR AND XE NEUTRON-RICH NUCLEI PRODUCTION THROUGH U-239 FISSION

The theoretical formalism and some results of a model realised for fis sion processes in a wide range of mass asymmetries are presented. The fission barriers are computed in a tridimensional configuration space using the Yukawa-plus-exponential macroscopic energies corrected withi n the Strutinsky procedure. It is assumed that channel probabilities a re proportional with Gamow penetrabilities. The model is applied for t he disintegration of the U-239 in order to determine the relative yiel ds for the production of neutron-rich nuclei at diverse intermediate e nergies. An analysis of the experimental data obtained in the framewor k of the PARRNE project is reported.