Abstract

Collisional narrowing due to line-mixing effects are studied in the v 3 and 3 v 3 bands of CO 2 perturbed by He and Ar at elevated pressure. The results of computations using an energy-corrected sudden approach are compared with measurements. The model enables the correct prediction of the decrease in the measured band widthwith increasing density which is due to interbranch (R ↔ P) coupling and which is analyzed theoretically in the infrared.

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