Abstract
Light-induced drift experiments at temperatures between 130 and 300 K have been performed on C2H4 With Kr as a collision partner. The experimental results for various rovibrational transitions in the nu 7 fundamental vibrational band are expressed in terms of the relative change in collision rate upon excitation, Delta nu / nu , as a function of the mean relative speed grms between the collision partners. For low grms, the collision rate nu is found to depend strongly on the rotational states involved. For high grms, the rotational dependence is relatively weak, and the values of Delta nu / nu converge to what is interpreted as the pure vibrational contribution.
Published Version
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