Angular distribution of fragments in neutron-induced nuclear fission at energies 1−200 MeV: Data, theoretical models and relevant problems

In recent years, investigations of angular distributions fragments in neutron-induced nuclear fission have been extended to intermediate energies, up 200 MeV, as well a wide range target isotopes. Using an example the latest data obtained by our group for reaction 237-Np(n,f), we discuss specific features fragment distribution and present method their simulation based on code TALYS. It is shown that simplified model reasonably describes energy dependence whole 1-200 MeV. The ways improve are discussed along with possibilities use it obtaining new information pre-equilibrium processes neutron-nucleus interaction. We consider also relevant problems describing distributions.