Broadening and Shift Coefficients of H2O Absorption Lines in the 8650–9020 cm–1 Spectral Region

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 an FTIR spectrometer in the spectral region 8650–9020 cm⁻¹ with a spectral resolution of 0.01 cm^–1. Using two model 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.