Kinetics of chemical reactions in a one-component system contained in a non-maxwellian light gas thermostat

It is shown that in a reacting one-component system contained in a light gas thermostat, a relatively small distortion in the "tail" of the Maxwellian distribution of the particles of the thermostat can lead to a noticeable change in the rate of reaction. The velocity• distribution function of the reacting component is found, and concrete expressions for the rate of chemical reactions in a non-Maxwellian thermostat are obtained. As an example, the reaction HI + HI = $I_{2}$+$H_{2}$ in an atmosphere of He is examined.