A STUDY OF THE THERMAL INFRARED BANDS OF ETHYLENE AT LOW TEMPERATURES
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Date
1982
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Publisher
Ohio State University
Abstract
In view of the recent observation of the $949 cm^{-1}$ fundamental band of ethylene in the atmospheres of Saturn and Titan made by the IRIS instrument on board the Voyager I spacecraft, we have studied this band as well as the $1443 cm^{-1}$ band at temperatures of 150K, 200K, and 296K, in the laboratory at NASA-Amea using a Nicolet interferometer-spectrometer and a cold cell developed at Stony Brook. Using nitrogen to broaden the rotational lines, the band strengths have been measured at 296K under conditions for which the rotational structure is smeared out. Using these results for the absolute intensities of the bands and the already published rotational analysis of these bands, we have made a comparison of a line-by-line calculation with our lower pressure spectra of the $C_{2}H_{4}$ nitrogen-broadened lines at temperatures of 150K, 200K, and 296K.
Description
$^{\ast}$Supported in part by NASA Grant NGR 33-034-139.