The Modelling of the Evolution of the Neutrino Distribution in the Expanding Area . (Homogeneous, isotropic approximation.)

The numerical modeling of the evolution of the neutrino distribution in restricted and expanding area has been made. The evolution of a neutrino distri-bution function has been described by the homogeneous, isotropic kinetic equation with an Uehling-Uhlenbeck collision integral. Besides the sources and sinks a neutrino (beta - processes), were taken into account the drift a neutrino from the simulated area. Simultaneously with evolution of the neutrino distribution the burnup of electrons in the beta - processes was calculated. The outcomes of calculations are presented and commented on.