Abstract

A theoretical description of line mixing in the Q branch of an infrared rotation–vibration band is obtained in the weak coupling approximation. The description is applied to the case of the ν2 band of CO2 near 667 cm−1. Theoretical absorption profiles are given for selected spectral regions corresponding to representative values of the pressure. A comparison is made between the weak coupling results and the results of a forthcoming dynamical calculation of the absorption band shape.

© 1982 Optical Society of America

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