TY - JOUR

T1 - LINE MIXING IN THE Ν3 AND FORBIDDEN Ν2 BANDS OF CH4 IN GASEOUS HELIUM

AU - Filippov, N.N.

AU - Grigoriev, I.M.

AU - Grigorovich, N.M.

AU - Tonkov, M.V.

PY - 2006

Y1 - 2006

N2 - The paper reports on studies of the possibility of the transfer of the adjustable parameters of the line mixing model describing the 3 absorption band shape of CH 4 in helium to the case of the forbidden 2 band shape. This transfer provides a reasonable overall agreement with the measured spectra, with deviations greater than the experimental uncertainties remaining in some J -manifolds. The model has been improved by taking into account the mixing of spectral lines with the same initial level. It was found that the description of the shapes of certain manifolds can be improved by fitting corresponding matrix elements of the optical rotational relaxation matrix, providing, in some particular cases, more detailed information on the matrix structure.

AB - The paper reports on studies of the possibility of the transfer of the adjustable parameters of the line mixing model describing the 3 absorption band shape of CH 4 in helium to the case of the forbidden 2 band shape. This transfer provides a reasonable overall agreement with the measured spectra, with deviations greater than the experimental uncertainties remaining in some J -manifolds. The model has been improved by taking into account the mixing of spectral lines with the same initial level. It was found that the description of the shapes of certain manifolds can be improved by fitting corresponding matrix elements of the optical rotational relaxation matrix, providing, in some particular cases, more detailed information on the matrix structure.

M3 - Article

SP - 2711

EP - 2718

JO - Molecular Physics

JF - Molecular Physics

SN - 0026-8976

IS - 16-17

ER -