Calculation of ion mobilities by means of the two-temperature displaced-distribution theory

Electric-field dependent ion mobility is calculated in the framework of the two-temperature displaced-distribution theory. The considered approach provides a better accuracy than the conventional approach based on (the first approximation in) the two-temperature theory and is better justified for the case of heavy ions, while being not much more complicated than the conventional approach. Calculated ion mobilities are in good agreement with experimental data.