Measurements and modeling of air-broadening coefficients for the ν6 band of CH3I. (May 2020)

• Record Type: Journal Article
• Authors: Raddaoui, E.; Soulard, P.; Guinet, M.; Aroui, H.; Jacquemart, D.
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 246(2020)
• Publication Date: 2020-05
• Subjects: Methyl iodide -- ν6 band -- Air-broadening coefficients -- J-and K-rotational dependences -- Updated line list; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2020.106934
• Languages: English
• ISSNs: 0022-4073

Abstract

Highligths: Multispectrum analysis of CH3 I spectra broadened by air. Measurements of air-broadening coefficients. J- and K -rotational model for air-broadening coefficients. Update of a complete CH3 I line list of the ν6 band for atmospheric databases. Abstract: The ν6 band of methyl iodide around 9.5 µ m is studied in terms of air-broadening coefficients. A multi-spectrum fitting procedure is applied to Fourier transform spectra using various mixtures of CH3 I 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. Graphical abstract: Image, graphical abstract