Measurements and modeling of air-broadening coefficients for the ν6 band of CH3I

•Multispectrum analysis of CH3I spectra broadened by air.•Measurements of air-broadening coefficients.•J- and K-rotational model for air-broadening coefficients.•Update of a complete CH3I line list of the ν6 band for atmospheric databases. The ν6 band of methyl iodide around 9.5 µm is studied in ter...

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Bibliographic Details
Published in:Journal of quantitative spectroscopy & radiative transfer 2020-05, Vol.246, p.106934, Article 106934
Main Authors: Raddaoui, E., Soulard, P., Guinet, M., Aroui, H., Jacquemart, D.
Format: Article
Language:English
Subjects:
Air-broadening coefficients
Chemical Physics
J-and K-rotational dependences
Methyl iodide
Physics
Updated line list
ν6 band
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Summary:•Multispectrum analysis of CH3I spectra broadened by air.•Measurements of air-broadening coefficients.•J- and K-rotational model for air-broadening coefficients.•Update of a complete CH3I line list of the ν6 band for atmospheric databases. The ν6 band of methyl iodide around 9.5 µm is studied in terms of air-broadening coefficients. A multi-spectrum fitting procedure is applied to Fourier transform spectra using various mixtures of CH3I and air in order to retrieve air-broadening coefficients. The numerous measurements performed in this work allow to model the J-and K-rotational dependences of the measured air-broadening coefficients. This model reproduces the measured air-broadening coefficients within standard deviation (1SD) equal to 7%. Comparisons with measurements from literature are performed. [Display omitted]
ISSN:0022-4073
1879-1352
DOI:10.1016/j.jqsrt.2020.106934