Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5415735 | Journal of Molecular Spectroscopy | 2007 | 25 Pages |
Abstract
Previously we obtained self-broadened halfwidth and self-induced shift coefficients at room temperature for 15 near infrared CO2 bands between 4750 and 7000 cmâ1 [R.A. Toth, L.R. Brown, C.E. Miller, V.M. Devi, D.C. Benner, J. Mol. Spectrosc., 239 (2006) 243-271]. The present study expands our work on the near infrared line parameters of CO2 to include air broadening coefficients. Here we report nearly 400 air-broadened half width and air-induced pressure shift coefficients spanning 11 different CO2 vibrational bands in the 4750-7000 cmâ1 region. Retrievals have been performed using Voigt line profiles over three distinct spectral intervals: (a) 4750-5200 cmâ1, covering the 20011 â 00001, 20012 â 00001, and 20013 â 00001 Fermi Triad and three associated hot bands 21111 â 01101, 21112 â 01101, 21113 â 01101; (b) 6100-7000 cmâ1, covering the 30011 â 00001, 30012 â 00001, 30013 â 00001 and 30014 â 00001 Fermi Tetrad; (c) near 6950 cmâ1 for the 00031 â 00001 overtone band. The air-broadened halfwidth and air-induced pressure shift coefficients have been modeled with empirical expressions and compared to other measurements available in the literature.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
R.A. Toth, C.E. Miller, V. Malathy Devi, D.C. Benner, L.R. Brown,