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Survey Study of Air-Broadened Water Vapor Lines in the ν2 Band by High-Resolution FTIR Spectroscopy

✍ Scribed by K.M.T. Yamada; M. Harter; T. Giesen

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
446 KB
Volume
157
Category
Article
ISSN
0022-2852

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✦ Synopsis

Pressure effects, broadening and shift, on (\mathrm{H}{2} \mathrm{O}) due to air were measured precisely for 271 rovibrational lines in the (v{2}) band by using a Fourier transform spectrometer. Rotational dependences of these effects were clearly observed in the present study which includes high- (J) transitions up to (J=18 \leftarrow 17). The observed rotational dependence is pronounced. Very small pressure-broadening coefficients were obtained for high- (J) transitions, e.g., (0.011 \mathrm{~cm}^{-1} /) bar for the unresolved (K)-doublet. (18_{0,18} \leftarrow 17_{1,17}) and (18_{1,18} \leftarrow 17_{0.17}), whereas medium- (J) transitions exhibit larger broadening, i.e., (7_{4.4} \leftarrow 66_{3.3}) yields (0.087 \mathrm{~cm}^{-1} /) bar. (c) 1993 Academic Press. Inc.

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