Vol. 32, issue 05, article # 3

Abstract:

The broadening and shift coefficients of H₂O absorption lines are compared for Ar, He, H₂, and N₂ buffer gases. The broadening and shift coefficients were derived from the analysis of the absorption spectra recorded with a Fourier spectrometer in the spectral range 8650–9020 cm^-1 with a spectral resolution of 0.01 cm^–1. Using two models of line profiles (Voigt and speed-dependent Voigt profiles) the parameters of the H₂O absorption lines were calculated. It is shown that the speed-dependent Voigt profile provides better agreement with experimental data.

Keywords:

broadening and shift coefficients, Fourier spectrometer, water vapor

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