In database:

0-10000 cm-1

0-260 nm

848-920 nm

Methane (CH₄)
16.0426 g/mole
Freezing point: -182.5 C
Boiling point: -161.5 C
HITRAN number: 6

Infrared cross-sections from PNNL
FTIR infrared cross-sections from 600 to 6500 cm^-1
Data available at 5 C, 25 C, and 50 C
Spectra is composite of on the order of 10 different pressures,backfilled with nitrogen to 760 T.
Images of PNNL data in cm²/molecule vs. wavenumbers
Images of PNNL data in cm²/molecule vs. microns


Line list from HITRAN 2008
Data from 0 to 9200 cm^-1
Images of HITRAN data on a log scale

Line list from HITRAN 2004
Data from 0 to 9200 cm^-1.
Images of HITRAN 2004 data in cm/molecule vs. wavenumbers
Images of HITRAN 2004 data in cm/molecule vs. microns

Line list from HITRAN 2000
Data from 0 to 6184 cm^-1.
Images of HITRAN 2000 data in cm/molecule vs. wavenumbers

Beta line list from NIR
Data from 0 to 10000 cm^-1.
Images of NIR data in cm/molecule vs. wavenumbers

Comparison of strong bands from different data sets
Comparison images

Visible Cross-sections
Cross sections from Absorption Spectra and Absorption Coefficients for Methane in the 750-940 nm Region Obtained by Intracavity Laser Spectroscopy; J.J. O'Brien and H. Cao; JQSRT 75:323-350 (2002).
Figures showing data from 750 to 940 nm.
Image of data replotted, 850-920 nm.

UV Cross-sections
Please see The MPI-Mainz UV/VIS Spectral Atlas

Additional References
Calculated k Distribution Coefficients for Hydrogen- and Self-Broadened Methane in the Range 2000-9500 cm^-1 from Exponential Sum Fitting to Band-Modelled Spectra; P.G.J. Irwin, S.B. Calcutt, F.W. Taylor, and A.L. Weir; J.Geophys.Research 101:26,137-26,154 (1996).

Notes

v₁ symmetric stretch (a₁) 2917 cm^-1
v₂ Deformation (e) 1534 cm^-1 (doubly degenerate)
v₃ stretch (f₂) 3019 cm^-1 (triply degenerate)
v₄ Deformation (f₂) 1306 cm^-1 (triply degenerate)




List of available data for all molecules in database
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