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Pressure Broadening and Shift of Some NH3Lines in the ν2Band

✍ Scribed by M. Fabian; R. Schieder; Koichi M.T. Yamada; G. Winnewisser

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
217 KB
Volume
177
Category
Article
ISSN
0022-2852

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✦ Synopsis

Pressure-induced line broadening and line shift of four rovibrational transitions in the n 2 band of NH 3 and of two unassigned transitions at 10 mm were measured, using the wavelength-stabilized Cologne diode laser spectrometer with an improved recording system. Self-effects and foreign gas effects caused by O 2 , N 2 , mixtures thereof, H 2 O, Ar, CO, and He have been investigated. Shift and broadening by the foreign gas H 2 O were found to be much larger than the effects of the other foreign gases. Thus, the effect of H 2 O contamination imposes a serious problem upon determining the pressure effects by other gases. For all lines, a linear dependence of the shift and the broadening on the mixing ratio of the foreign gases O 2 and N 2 has been found.

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