LED-based Fourier transform spectroscopy of 16O12C18O and 12C18O2 in the 11,260–11,430cm−1 range

LED-based Fourier transform spectroscopy of 16O12C18O and 12C18O2 in the 11,260–11,430cm−1 range The absorption spectrum of the 16O12C18O and 12C18O2 carbon dioxide isotopologues has been recorded in the 11,260– 11,430cm−1 spectral range using Bruker IFS 125 HR Fourier transform spectrometer with resolution 0.05cm−1 at temperature 297K and path length 24m. The 18O enriched sample of carbon dioxide at total pressure 96.5mbar was used for these purposes. The spectrometer used LED emitter as a light source. This gave possibility to reach the minimal detectable absorption coefficient αmin~1.4×10−7cm−1 using 23,328 scans. In the recorded spectrum we have assigned the 00051–00001 band for both 16O12C18O and 12C18O2 isotopologues using the predictions performed within the framework of the method of effective operators. The line positions and intensities of the observed bands are found. The comparison of the observed and predicted line positions and intensities is performed confirming good accuracy of the predictions. The spectroscopic parameters for the observed bands are determined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Quantitative Spectroscopy & Radiative Transfer Elsevier

LED-based Fourier transform spectroscopy of 16O12C18O and 12C18O2 in the 11,260–11,430cm−1 range

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier Ltd
ISSN
0022-4073
eISSN
1879-1352
D.O.I.
10.1016/j.jqsrt.2015.11.024
Publisher site
See Article on Publisher Site

Abstract

The absorption spectrum of the 16O12C18O and 12C18O2 carbon dioxide isotopologues has been recorded in the 11,260– 11,430cm−1 spectral range using Bruker IFS 125 HR Fourier transform spectrometer with resolution 0.05cm−1 at temperature 297K and path length 24m. The 18O enriched sample of carbon dioxide at total pressure 96.5mbar was used for these purposes. The spectrometer used LED emitter as a light source. This gave possibility to reach the minimal detectable absorption coefficient αmin~1.4×10−7cm−1 using 23,328 scans. In the recorded spectrum we have assigned the 00051–00001 band for both 16O12C18O and 12C18O2 isotopologues using the predictions performed within the framework of the method of effective operators. The line positions and intensities of the observed bands are found. The comparison of the observed and predicted line positions and intensities is performed confirming good accuracy of the predictions. The spectroscopic parameters for the observed bands are determined.

Journal

Journal of Quantitative Spectroscopy & Radiative TransferElsevier

Published: Jul 1, 2016

References

  • CDSD-296, high resolution carbon dioxide spectroscopic databank: version for atmospheric applications
    Tashkun, S.A.; Perevalov, V.I.; Gamache, R.R.; Lamouroux, J.

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