Wind Effect on H2O Absorption Lines Perturbed by He, Ar, Kr, and Xe Pressure

Abstract

The effect of two factors, i.e., the dependence of the broadening coefficients γ and shifting coefficient δ on the speed \({{{v}}_{a}}\) of absorbing water vapor molecule (wind effect) and a change in the H₂O molecule speed upon collision with gas atoms, on the profile of an absorption line of water vapor in a mixture with helium, argon, krypton, and xenon is studied with three absorption lines of H₂O molecule from ν₁ + ν₂ + ν₃ band with different rotational quantum numbers of the initial quantum state. The wind effect is shown to be the strongest in interactions of H₂O molecules with argon, krypton, and xenon atoms. The results can be used in the analysis of absorption spectra of water vapor mixed with monatomic gases.