Hot electrons in liquefied rare gases

Aj is the mean free path for momentum transfer connected with a change in direction e is the electron energy. The function b(x) is given as 

Aq is the mean free path for energy transfer no change in direction is implied. M is the mass of a rare gas atom. For zero electric field, fo(x) is given as exp(-x) and for f(p) the Maxwellian velocity distribution is obtained. 

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An in-depth treatment of the problem of hot electrons in liquefied rare gases has been given by lakubov and his co-workers (Atrazhev and lakubov, 1981 Atrazhev and Dmitriev, 1985). The electric field dependence of the mean electron energy (cf, Fig. 6) has been verified experimentally by the measurement of the ratio of the diffusion coefficient to mobility in liquid argon and liquid xenon by Shibamura et al. (1979) and Kubota et al. (1982). 

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