LINE PARAMETERS FOR THE 5-$\mu$m BANDS OF CARBON DIOXIDE
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Date
1983
Journal Title
Journal ISSN
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Publisher
Ohio State University
Abstract
Positions and intensities of carbon dioxide lines in the $1830-2010 cm^{-1}$ region have been measured from long-path, low-pressure $ (p < 10 Torr) 0.01-cm^{-1}$ resolution spectra recorded at room temperature with the Fourier transform spectrometer in the McMath solar telescope complex at Kitt peak National Observatory. Over 96 percent of the 1038 lines observed have been assigned to bands of $^{12}C^{16}O_{2}$, $^{13}C^{16}O_{2}$, $^{12}C^{16}O^{18}O$,$^{12}C^{16}O^{17}O$ and $^{13}C^{16}O^{18}O$ or identified as residual lines of $H_{2}O$. The weakest carbon dioxide lines have intensities of $\approx 0.5\times 10^{-26}$ cm/molecule at room temperature. A preliminary analysis of the data has published in the form of an atlas of observed spectra with tabulated observed and calculated line positions and $assignments.^{1}$ In this talk, the absolute intensity measurements are discussed. Values have been derived for selected unblended lines with a nonlinear least squares curve fitting procedure. Intensities determined from spectra recorded with different pressure-path length combinations agree to = 1 percent for the stronger lines. The intensity data have been analyzed to determine vibrational band intensities and F-factor coefficients for the stronger bands. ${^{1}}$D. C. Benner, C.P. Rinsland, D.J. Richardson, T.-H. Soo, and M.A.H. Smith, NASA Technical Memorandum 84612, 1983.
Description
Author Institution: Department of Physics, College of Willam and Mary; Department of Physics, Systems and Applied Sciences Corporation; Department of Physics, NASA Langley Research Center