An unanswered question in collision-induced rotational transfer (RT) centers on the similarities that characterize the distributions of ∆j states despite very large differences in mass and chemical composition of collision partners (
In the recently proposed angular momentum (AM) theory of collision-induced rotational transfer, the probability distribution of effective impact parameter (or torque arm) plays a central role as the means via which linear momentum is converted to AM. This was found empirically to be best represented by the function P(b n ) ) b n -γ . Here we show that the ubiquitous inverse power function is readily explained as resulting from the combined contributions to P(b n ) that come from considering both angular and radial variability in a realistic intermolecular potential.
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