  The results of the molecular dynamics simulation of the radiation influence
on the structure and thermophysical properties of water are presented. The
changes in the radial distribution functions, momentum distribution function
and the selfdiffusion coefficients are quantified. It is shown that the
irradiation causes the changes in the structural and thermodynamic properties
of water. The "effective temperature" of the stationary nonequilibrium water
system under the irradiation allowing to define the correspondent equilibrium
system with the same structural and thermodynamic properties is calculated. It
is confirmed that the structural changes in the liquid systems under
irradiation are caused by the changes in the coefficients of the Maxwell
distribution function due to the momentum exchange between the active particles
and the particles forming the liquid. To explain the phenomena observed in the
molecular dynamics simulation the results are quantitatively compared to the
predictions of the theoretical model of the phenomenon that is based on the
Bogolyubov chain of equations and with the experimental data.
