Line parameters of acetylene in the 1.9 and 1.7-µm spectral regions - Sorbonne Université Access content directly
Journal Articles Journal of Quantitative Spectroscopy and Radiative Transfer Year : 2008

Line parameters of acetylene in the 1.9 and 1.7-µm spectral regions

Abstract

Using FT spectra (Bruker IFS 120, unapodized resolution ̴ 0.01 cmˉ¹) of acetylene 12C2H2, line positions and intensities, as well as self-broadening and shifting coefficients are measured for about 550 lines of 13 bands between 5000 and 6000 cmˉ¹. A multispectrum fitting procedure is used to retrieve line parameters from 4 experimental spectra recorded at different pressures. An absolute wavenumber calibration has been performed using isolated acetylene line positions around 5900 cmˉ¹. The average accuracy of the line parameters obtained in this work is estimated to be +/- 0.001 cmˉ¹ for line positions, 5-10% for line intensities depending on the transitions, about 5% for self-broadening coefficients, and +/- 0.005 cmˉ¹.atmˉ¹ for self-shifting coefficients. For each studied band, the vibrational transition dipole moment squared and the empirical Herman-Wallis coefficients are adjusted. The measured line intensities allow to obtain the effective dipole moment parameters of the global approach for the ΔP = 8 and 9 series. A polynomial description of the rotational dependence of self-broadening coefficients is performed. A weak rotational dependence of the self-shifting coefficients is observed.
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Dates and versions

hal-00745582 , version 1 (25-10-2012)

Identifiers

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Oleg M. Lyulin, David Jacquemart, Nelly Lacome, Valery I. Perevalov, Jean-Yves Mandin. Line parameters of acetylene in the 1.9 and 1.7-µm spectral regions. Journal of Quantitative Spectroscopy and Radiative Transfer, 2008, 109 (10), pp.1856-1874. ⟨10.1016/j.jqsrt.2007.11.016⟩. ⟨hal-00745582⟩
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