LINE POSITIONS OF $CO^{2}$ IN THE 580 TO $940 CM^{-1}$ REGION AT ELEVATED TEMPERATURES
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Date
1990
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Ohio State University
Abstract
A $CO_{2}$ sample of natural isotopic abundance has been heated to 800 K in a high temperature absorption cell of pathlength 1 3/4 meters. Sample pressures ranged from 5 to 40 torr. The spectral measurements were made using the AFGL (Air Force Geophysics Laboratory) high resolution Fourier transform spectrometer with resolutions of up to $0.004 cm^{-1}$. Many ``hot bands'' were clearly seen in the experimental spectra. Line positions determined from the measurements made at different pressures were merged into a single data set, and then a weighted least-squares fit was used to obtain improved vibration-rotation constants. Effective vibration-rotation constants for these bands will be presented at the symposium. This work was supported by the Air Force Office of Scientific Research (AFOSR) as part of AFGL Task 2310G1.
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Author Institution: Stewart Radiance Laboratory, Utah State University; OPI/Air Force Geophysics Laboratory, Hanscom AFB