Kr and Xe neutron-rich nuclei production through 239U fission

The theoretical formalism and some results of a model realised for fission 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 with the Strutinsky procedure. Is is assumed that channel probabilities are proportional with Gamow penetrabilities. The model is applied for the disintegration of the 239U in order to determine the relative yields for the production of neutron-rich nuclei at diverse intermediate energies. An analysis of the experimental data obtained in the framework of the PARRNE project is reported