Vibrational and rotational relaxation in a moderately dense gas. I

On the basis of kinetic equation by means of the Bogoliubov method vibrational and rotational relaxations are considered taking into account the first correction in density in thermodynamical, relaxational and dissipative characteristics of gases. Equations of relaxational gasodynamics are derived in the local equilibrium approximation and relaxation times are found in the case of the weak excitation of vibrational states of moleculi.