Interpretation of ES, CS, and IOS approximations within a translational-internal coupling scheme. II. Application to atom–diatom kinetic cross sections

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Abstract
ES, CS, and IOS approximations to atom–diatom kinetic cross sections are derived. In doing so, reduced S‐matrices in a translational‐internal coupling scheme are stressed. This entails the insertion of recently obtained approximate reduced S‐matrices in the translational‐internal coupling scheme into previously derived general expressions for the kinetic cross sections. Of special interest is the structure (rotational j quantum number dependence) of the kinetic cross sections associated with the Senftleben Beenakker effects and of pure internal state relaxation phenomena. The viscomagnetic effect is used as an illustrative example. It is found in particular that there is a great similarity of structure between the energy sudden (and IOS) approximation and the previously derived distorted wave Born results.