The MPI-Mainz UV/VIS Spectral Atlas

of Gaseous Molecules of Atmospheric Interest

www.uv-vis-spectral-atlas-mainz.org

Hannelore Keller-Rudek1, Geert K. Moortgat2, Rolf Sander2, Rüdiger Sörensen1

1Satellite Group

2Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany

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When referring to the Spectral Atlas, please cite our publication:

Keller-Rudek, H., Moortgat, G. K., Sander, R., and Sörensen, R.: The MPI-Mainz UV/VIS spectral atlas of gaseous molecules of atmospheric interest, Earth Syst. Sci. Data, 5, 365–373, (2013), DOI: 10.5194/essd-5-365-2013

Cross Sections / Alkanes+alkyl radicals / Alkanes / CH4 / Mount(1977)_294K_137-160nm

DATAFILE: CH4_Mount(1977)_294K_137-160nm.txt
NAME: methane
FORMULA: CH4
AUTHOR(YEAR): Mount(1977)
T: 294K
λ: 137-160nm
BIBLIOGRAPHY: G.H. Mount, E.S. Warden, and H.W. Moos, "Photoabsorption cross sections of methane from 1400 to 1850 Å", Astrophys. J. 214, L47-L49 (1977); DOI: 10.1086/182440
COMMENTS: Measurements also at 200 K by

G.H. Mount and H.W. Moos, "Photoabsorption cross sections of methane and ethane, 1380-1600 Å, at T = 295 K and T = 200 K", Astrophys. J. 224, L35-L38 (1978); DOI: 10.1086/182753:

σ(200 K)/σ(295 K) = 1 at λ = 138 - 142 nm;
σ(200 K)/σ(295 K) decreases to ∼ 0.8 between 142 and 147 nm (see Fig. 2)

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