Line shape parameters for HF in a bath of argon as a test of classical path models

摘要

The classical pathe method by Neilsen and Gordon[J.Chem, Phys. 58,413(1973)] is tested by comparison with extensive fully quantal calculations and recent measurements of cross-sections for HF-Ar. Widths and shifts are found to be in satisfacctory atgreemaent both with the close-cou;ling and experimental results. Comparisons are slso made with more"downgraded" theoretical approaches based on the peaking approximnation and the neglect of the time ordering. Finally, the Neilsen and Gordon approach is used in orer to demonstrte that vibration-rotation coupling significaltly contributes to the rotational dependence of both widths and shifts cross-sections