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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 62, Iss. 2 — Feb. 1, 1972
  • pp: 284–289

Broadening of Infrared Absorption Lines at Reduced Temperatures: Carbon Dioxide

LLOYD D. TUBBS and DUDLEY WILLIAMS  »View Author Affiliations


JOSA, Vol. 62, Issue 2, pp. 284-289 (1972)
http://dx.doi.org/10.1364/JOSA.62.000284


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Abstract

An evacuated high-resolution Czerny-Turner spectrograph, which is described in this paper, has been used to determine the strengths S and self-broadening parameters γ0 for lines in the R branch of the ν3 fundamental of 12C16O2 at 298 and at 207 K. The values of γ0. at 207 K are greater than those to be expected on the basis of a fixed collision cross section σ. The approximate ratio of the measured cross sections for a given line is σ(T1)/σ(T2) = T2/T1; although this relation holds for the average of all lines measured, the cross-section ratio is greater than the temperature ratio for lines near the band center and less than the temperature ratio for lines in the wings of the band.

Citation
LLOYD D. TUBBS and DUDLEY WILLIAMS, "Broadening of Infrared Absorption Lines at Reduced Temperatures: Carbon Dioxide," J. Opt. Soc. Am. 62, 284-289 (1972)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-62-2-284


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