Research output: Contribution to journal › Article › peer-review
Line-mixing effects in the nu(3) parallel absorption band of CH3F perturbed by rare gases. / Grigoriev, I. M.; Le Doucen, R.; Benidar, A.; Filippov, N. N.; Tonkov, M. V.
In: Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 58, No. 2, 08.1997, p. 287-299.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Line-mixing effects in the nu(3) parallel absorption band of CH3F perturbed by rare gases
AU - Grigoriev, I. M.
AU - Le Doucen, R.
AU - Benidar, A.
AU - Filippov, N. N.
AU - Tonkov, M. V.
PY - 1997/8
Y1 - 1997/8
N2 - We have measured the absorption profiles of CH3F mixed with argon and helium at room temperature in the interval 940-1110 cm(-1) of the nu(3) band. The spectra measured at pressures of 0.25-3 bar were used for evaluation of the line-broadening parameters. At higher pressures up to 20 bar significant deviations from the Lorentz bandshape were detected. At the maximum of the Q branch the absorption is super-Lorentzian, the differences reaching up to 60%. In the lower frequency wing of the P branch the observed absorption is up to five times lower than the Lorentzian one. The discrepancies observed are sensitive to the perturbing molecule, being more pronounced in the case of helium. They are explained by line-mixing effects and interpreted by means of a simple model with a single adjustable parameter. (C) 1997 Elsevier Science Ltd.
AB - We have measured the absorption profiles of CH3F mixed with argon and helium at room temperature in the interval 940-1110 cm(-1) of the nu(3) band. The spectra measured at pressures of 0.25-3 bar were used for evaluation of the line-broadening parameters. At higher pressures up to 20 bar significant deviations from the Lorentz bandshape were detected. At the maximum of the Q branch the absorption is super-Lorentzian, the differences reaching up to 60%. In the lower frequency wing of the P branch the observed absorption is up to five times lower than the Lorentzian one. The discrepancies observed are sensitive to the perturbing molecule, being more pronounced in the case of helium. They are explained by line-mixing effects and interpreted by means of a simple model with a single adjustable parameter. (C) 1997 Elsevier Science Ltd.
KW - Q-BRANCHES
KW - FOURIER-TRANSFORM
KW - SPECTROSCOPY
KW - CO2
KW - N-2
KW - INTERFERENCE
KW - (CH3F)-C-12
KW - 2-NU-3
KW - SHAPES
KW - NU(2)
UR - http://www.scopus.com/inward/record.url?scp=0000335754&partnerID=8YFLogxK
U2 - 10.1016/S0022-4073(97)00014-9
DO - 10.1016/S0022-4073(97)00014-9
M3 - статья
AN - SCOPUS:0000335754
VL - 58
SP - 287
EP - 299
JO - Journal of Quantitative Spectroscopy and Radiative Transfer
JF - Journal of Quantitative Spectroscopy and Radiative Transfer
SN - 0022-4073
IS - 2
ER -
ID: 28687565