Spectral shifts of methane lines in collisions with hydrogen, helium, nitrogen, and argon
Abstract
Pressure-induced shifts of rotational-vibrational lines in CH4 have been measured at very high spectral resolution in the R-branch of the 3nu(3) overtone. The colliding gases were H2, He, N2, and Ar. Results are presented as functions of rotational and tetrahedral quantum numbers. Mean values (in 0.001/cm per torr) for the R0-R6 multiplets are -0.01109 (CH4-H2), +0.00547 (opposite sense) (CH4-He), -0.01990 (CH4-N2), and -0.02126 (CH4-Ar).
- Publication:
-
Journal of Quantitative Spectroscopy and Radiative Transfer
- Pub Date:
- September 1989
- DOI:
- Bibcode:
- 1989JQSRT..42..201F
- Keywords:
-
- Atmospheric Radiation;
- Line Spectra;
- Methane;
- Molecular Spectra;
- Rotational Spectra;
- Scattering Cross Sections;
- Argon;
- Helium;
- Hydrogen;
- Nitrogen;
- Vibrational Spectra;
- Atomic and Molecular Physics