Line parameters of HDO from high-resolution Fourier transform spectroscopy in the 11 500–23 000 cm⁻¹ spectral region

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• 作者：Mohamed Bach ; Sophie Fally ; Pierre-Franç ; ois Coheur ; Michel Carleer ; Alain Jenouvrier and Ann Carine Vandaele
• 关键词：HDO ; Line parameters ; Fourier transform spectroscopy
• 刊名：Journal of Molecular Spectroscopy
• 出版年：2005
• 期刊代码：129_00222852
• 类别：ch
• 出版时间：2005
• 卷：232
• 期：2
• 页码：341-350
• 文件大小：1213 K

摘要

This work presents new measurements of HDO line parameters in the near-infrared and visible regions (11 500–23 000 cm⁻¹). The measurements consist in high-resolution Fourier transform absorption spectra of H₂O/HDO/D₂O vapor mixtures, obtained using a long absorption path. Spectra with and without nitrogen as the buffer gas were recorded. Due to the simultaneous presence of the three isotopologues H₂O, D₂O, and HDO, the H₂O lines removal and the D₂O lines identification were two necessary preliminary steps to derive the HDO line parameters. The D₂O contribution was small and confined to the well-known 4ν₁ + ν₃ band. An extensive listing of HDO spectroscopic parameters was obtained, for the first time, by fitting some 3256 observed lines to Voigt line profiles. The list contains calibrated line positions, absorption cross-sections and, for many of the lines, N₂-broadening coefficients, as well as N₂-induced frequency shifts. As a result of the low HDO vapor pressures, it was not possible to retrieve the self-broadening parameters. The list is available on the http://www.ulb.ac.be/cpmhttp://www.ulb.ac.be/cpm website.