TY - JOUR

T1 - HELIUM AND ARGON LINE BROADENING IN THE Ν2 BAND OF CH 4

AU - Gabard, T.

AU - Grigoriev, I.M.

AU - Grigorovich, N.M.

AU - Tonkov, M.V.

PY - 2004

Y1 - 2004

N2 - The spectra of the gaseous mixtures CH4-He and CH4-Ar were obtained in the spectral region 1400-1750 cm-1 with a resolution up to 0.003 cm-1. Helium and argon pressure broadenings for the vibration-rotation lines of the V2 band of CH4 have been estimated at room temperature for some lines in the P, Q, and R branches. These values were also calculated using the theoretical approach developed by Robert and Bonamy, extended to the case of tetrahedral molecules. The helium data have been found to be in a satisfactory agreement whereas a divergence of calculated and measured broadening coefficients has been evidenced in the case of argon. Simulations of the V2 band shapes of methane perturbed by helium have also been performed. © 2004 Elsevier Inc. All rights reserved.

AB - The spectra of the gaseous mixtures CH4-He and CH4-Ar were obtained in the spectral region 1400-1750 cm-1 with a resolution up to 0.003 cm-1. Helium and argon pressure broadenings for the vibration-rotation lines of the V2 band of CH4 have been estimated at room temperature for some lines in the P, Q, and R branches. These values were also calculated using the theoretical approach developed by Robert and Bonamy, extended to the case of tetrahedral molecules. The helium data have been found to be in a satisfactory agreement whereas a divergence of calculated and measured broadening coefficients has been evidenced in the case of argon. Simulations of the V2 band shapes of methane perturbed by helium have also been performed. © 2004 Elsevier Inc. All rights reserved.

U2 - 10.1016/j.jms.2004.02.023

DO - 10.1016/j.jms.2004.02.023

M3 - Article

SP - 123

EP - 131

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

SN - 0022-2852

IS - 2

ER -