MOLECULAR PARAMETERS FOR CARBON DIOXIDE ABSORPTIONS IN THE $3450 cm ^{-1}$ SPECTRAL REGION
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Date
1986
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Ohio State University
Abstract
Line positions and intensities of carbon dioxide transitions between 3400 and about $3500 cm^{-1}$ have been determined from long-path, low-pressure, room-temperature spectra recorded with $0.01 cm^{-1}$ resolution using the Fourier transform spectrometer in the McMath telescope of the National Solar Observatory. Numerous vibration-rotation bands have been identified. The upper level of the $(21^{1}1)_{III} - (11^{1}0)_{I}$ band interacts with the $(40^{\circ}0)_{II}$ vibrational level. A non-linear least squares spectral fitting technique has been applied to all unblended $CO_{2}$ lines in these spectra. The pressure ranged from 1 to 10 Torr with an absorption path of up to 385 m. The measured intensities have been analyzed to determine vibrational band intensities and F-factor coefficients for the bands not extending beyond our high frequency limit.
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Address of Benner and Malathy Devi: Department of Physics, College of William and Mary, Williamsburg, VA 23185 Address of Rinsland: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23665
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