Analysis of state-to-state classical rotational cross-sections for Ar-CO2 collisions

Classical state-to-state Ar-CO2 rotational cross-sections are calculated us ing two potentials. Comparison with experimental data shows that there are discrepancies. The two-dimensional atom-ellipsoid model is used to analyse the cause of these discrepancies, and it is found that the cross-sections a re sensitive to multiple collision effects. The results, considering only t he contribution of the repulsive part of the two potentials, showed satisfa ctory agreement with the experimental measurements but, on taking into acco unt the whole potentials, some deviations from the experimental state-to-st ate rotational cross-sections were observed. These deviations were attribut ed to the strong contribution from the long-range part of each potential.