A Kinetic theory of intercollisional interference effects in arbitrary gas mixtures

Campbell, Roderick R. A. (1982) A Kinetic theory of intercollisional interference effects in arbitrary gas mixtures. Masters thesis, Memorial University of Newfoundland.

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Abstract

A kinetic theory of intercollisional interference effects in collision-induced translational absorption by arbitrary binary gas mixtures has been developed. Expressions have been derived for the intercollisional dip in which no assumptions about the relative concentration ratios or relative masses of the two constituents have been made. The variation of the halfwidth of the dip with the concentration ratio of the mixture has been obtained. The halfwidths at the infinitely dilute endpoints, nA/nB￬0 and nA/nB￪ °° predicted by this theory are in agreement with previous theoretical results. This theory also shows reasonably good agreement with the experimental data on the line shape as a function of nAnB for various concentration ratios. Our curves provide the correct qualitative behaviour of the line shape. -- In addition, expressions have been developed for intercollisional interference effects in collision-induced translational absorption by mixtures of arbitrary composition. That is, the above theory has been extended to include mixtures in which the number of constituents is arbitrary.

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