  A new statistical method for systematizing the nuclei fission fragments,
investigation of their mass and charge spectra and neutron fission parameters
has been suggested. In proposed method, the mass and charge yields of nucleons
are determined from the equilibrium conditions of the nuclear fragments
post-fission ensemble. Here we consider protons and neutrons of different
fragments as statistically non-equivalent. The abilities of the proposed
statistical method for explanation of the U, Pa, Th, Ac and Ra post-fission
fragments ordering and neutron emission function calculation have been
demonstrated.
