Air- and N2-Broadening Parameters of HDO and D2O, 709 to 1936 cm−1

✍ Scribed by Robert A. Toth

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 307 KB
• Volume: 198
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1999.7966

✦ Synopsis

High-resolution measurements of air- and N(2)-broadened widths and pressure-induced frequency shifts of HDO and D(2)O covering the spectral region between 700 and 2000 cm(-1) were obtained with absorption paths of 2.39, 25, 73, and 193 m. The majority of the measurements included the (010)-(000) bands of HD(16)O and D(2) (16)O. Also measured were 17 lines of the pure rotational band of HD(16)O and several transitions of the (010)-(000) bands of HD(18)O and D(2) (18)O and a few transitions of the "hot" band, (020)-(010), for HD(16)O and D(2) (16)O. The observed width coefficients ranged from 0.02 to 0.1 cm(-1)/atm and the pressure-induced shift coefficients fell between +0.012 and -0.012 cm(-1)/atm. Line mixing was observed for a few of the pairs of transitions of HDO but was of no consequence for D(2)O lines. However, the effects of line mixing were small and accurate results were obtained using the Voigt line profile. Collisional narrowing effects were not observed in the data. Copyright 1999 Academic Press.