Spectral shape of nitrogen-broadened methane isolated lines

Tuong Le Cong, José-Luis Domenech, Muriel Lepere, Ha Tran

Résultats de recherche: Contribution à un événement scientifique (non publié)PosterRevue par des pairs


The room temperature nitrogen-broadened spectra of 9 methane isolated transitions were measured at pressures from 20 mbar to 925 mbar using two different spectrometers: a tunable diode laser spectrometer and a difference-frequency laser spectrometer. These lines, located in the v4, v1+v4, v2+v4 and v3+v4 bands, have rotational quantum numbers varying from 0 to 9. The measured spectra were then fitted one-by-one using the Voigt profile. The obtained values of the Lorentz half-width and its rotational dependence were compared with values in the literature. The non-Voigt effect, characterized by the pressure dependence of the broadening coefficients and the fit residuals, was also quantified. These results will be compared with the calculated ones obtained from molecular dynamic simulations for methane diluted in nitrogen as done previously for HCl in Ar and H2O in N2.
langue originaleAnglais
Etat de la publicationPublié - 30 août 2016
EvénementThe 24th International Conference on High Resolution Molecular Spectroscopy - Prague, République tchèque
Durée: 30 août 20163 sept. 2016

Comité scientifique

Comité scientifiqueThe 24th International Conference on High Resolution Molecular Spectroscopy
Pays/TerritoireRépublique tchèque
La villePrague
Adresse Internet

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