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 / Peroxy radicals / Alkylperoxy / CH3O2 / Farago(2013)_298K_1335.05-1335.44nm(max)

DATAFILE: CH3O2_Farago(2013)_298K_1335.05-1335.44nm(max).txt
NAME: methylperoxy radical
FORMULA: CH3O2
AUTHOR(YEAR): Farago(2013)
T: 298K
λ: 1335.05-1335.44nm(max)
BIBLIOGRAPHY: E.P. Faragó, B. Viskolcz, C. Schoemaecker, and C. Fittschen, "Absorption spectrum and absolute absorption cross sections of CH3O2 radicals and CH3I molecules in the wavelength range 7473-7497 cm-1", J. Phys. Chem. A 117, 12802-12811 (2013); DOI: 10.1021/jp408686s
COMMENTS: The near-infrared absorption spectrum of CH3O2 has been measured in the wavelength range 7497.4 −7473.8 cm−1 at a total pressure of 50 Torr helium. Radicals have been prepared by 248 nm laser photolysis of CH3I in the presence of O2, and a relative absorption spectrum has been extracted from a time-resolved measurement of CH3O2 decay at each wavelength. Absolute absorption cross sections were determined at two pressures (50 and 100 Torr) for three wavelengths (7488.18, 7489.16, 7490.33 cm−1), corresponding to distinct absorption maxima in the broad absorption band. No pressure dependence was observed.

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