Abstract

An experimental method is described which allows the simultaneous measurement of drift velocity, longitudinal and transverse diffusion coefficients of electrons in counting gas mixtures. Results in CF 4 and argon/CF 4 are presented. In CH 4 and Ar/CH 4 mixtures the problems in the calculation of the transverse diffusion in molecular gases are discussed. An empirical formula which can be used for practical purposes has been derived. A comparison with recently published theoretical results suggests that a multiterm Boltzmann code could be the adequate formalism to calculate the motion of electrons in counting gas mixtures.

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