Quasiclassical approximation for elastic collision frequency at low temperaturesстатья
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Аннотация:For the Lennard-Jones potential in the quasiclassical approximation, the expression for the elastic collision frequency was obtained as an expansion over reduced temperature T*, The zero approximation (T* → 0) takes account only of the influence of an attractive part of potential as the first approximation is concerned with the influence of a potential depth. For the temperatures of interest in the supersonic jet expansion, it was shown that calculation of the collision frequency can be limited in the zero approximation.