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A calculation method for estimating a cross section using a Boltzmann equation analysis

A calculation method is proposed for estimating a momentum transfer cross section or a total cross section (summation of the elastic momentum and inelastic), from electron drift velocity versus E/N data, by a Boltzmann equation method. Here, E is the electric field and N is the gas number density. In this method, the calculation is performed knowing that the electron energy distribution is shifted towards higher energy with increasing electric field. The validity of this method is examined by applying the analysis to a model gas, which consists of elastic momentum transfer and electronic excitation as collisions between an electron and a gas atom. The results show that a good approximation, a correct cross section can be obtained automatically from the electron drift velocity data by this method.