Research output: Contribution to journal › Conference article › peer-review
Line broadening and line mixing effect in v3 band of CH4 perturbed by He gas. / Grigoriev, I. M.; Filippov, N. N.; Tonkov, M. V.; Gabard, T.; Le Doucen, R.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4063, 01.01.2000, p. 212-216.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Line broadening and line mixing effect in v3 band of CH4 perturbed by He gas
AU - Grigoriev, I. M.
AU - Filippov, N. N.
AU - Tonkov, M. V.
AU - Gabard, T.
AU - Le Doucen, R.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - The spectra of CH4-He mixtures were measured in the P- and R-region of v3 vibration-rotation band at lower pressures of 0.26-1.0 bar and for the whole band at higher pressures up to 90 bar. The broadening line coefficients were found from lower pressure data for the lines of P branch. These coefficients were calculated in the frame of the semi-classical approach. They agree with the experimental values, but a small J-dependent deviation was observed. The line mixing effect was observed. At higher pressure it was interpreted in the terms of the adjusted branch-coupling model. At lower pressure the line mixing effect was found to be especially pronounced in the region of relatively weak lines forming the clusters R(16) - R(19).
AB - The spectra of CH4-He mixtures were measured in the P- and R-region of v3 vibration-rotation band at lower pressures of 0.26-1.0 bar and for the whole band at higher pressures up to 90 bar. The broadening line coefficients were found from lower pressure data for the lines of P branch. These coefficients were calculated in the frame of the semi-classical approach. They agree with the experimental values, but a small J-dependent deviation was observed. The line mixing effect was observed. At higher pressure it was interpreted in the terms of the adjusted branch-coupling model. At lower pressure the line mixing effect was found to be especially pronounced in the region of relatively weak lines forming the clusters R(16) - R(19).
UR - http://www.scopus.com/inward/record.url?scp=0033905495&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:0033905495
VL - 4063
SP - 212
EP - 216
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
SN - 0277-786X
T2 - 13th Symposium and School on High-Resolution Molecular Spectroscopy
Y2 - 4 July 1999 through 6 July 1999
ER -
ID: 35917711