The MPI-Mainz UV/VIS Spectral Atlas

of Gaseous Molecules of Atmospheric Interest

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

1Satellite Group

2Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany


Cross Sections

Quantum Yields


Contact, Imprint, Acknowledgements

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 / Tyndall(2001)_298K_205-295nm(eval)

DATAFILE: CH3O2_Tyndall(2001)_298K_205-295nm(eval).txt
NAME: methylperoxy radical
AUTHOR(YEAR): Tyndall(2001)
T: 298K
λ: 205-295nm(eval)
BIBLIOGRAPHY: G.S. Tyndall, R.A. Cox, C. Granier, R. Lesclaux, G.K. Moortgat, M.J. Pilling, A.R. Ravishankara, and T.J. Wallington, "The atmospheric chemistry of small organic peroxy radicals", J. Geophys. Res. 106(D11), 12157-12182 (2001); DOI: 10.1029/2000JD900746
COMMENTS: Recommendation based on the data of

K. McAdam, B. Veyret, and R. Lesclaux, "Absorption spectra of HO2 and CH3O2 radicals and their kinetics of their mutual reactions at 298 K," Chem. Phys. Lett. 133, 39-44 (1987),

G.K. Moortgat, B. Veyret, and R. Lesclaux, "Absorption spectrum and kinetics of reactions of the acetylperoxy radical," J. Phys. Chem. 93, 2362-2368 (1989),

F.-G. Simon, "Spektrum und Kinetik der Selbstreaktion des Methylperoxy Radikals CH3O2 und seiner Reaktion mit ClO," Johannes-Gutenberg-Universität, Mainz, Germany, 1989,

P.D. Lightfoot and A.A. Jemi-Alade, "The temperature dependence of the UV spectra of the HO2 and CH3O2 radicals," J. Photochem. Photobiol A: Chem. 59, 1-10 (1991),

M.E. Jenkin and R.A. Cox, "Kinetics of reactions of CH3O2 and HOCH2CH2O2 radicals produced by the photolysis of iodomethane and 2-iodoethanol," J. Phys. Chem. 95, 3229-3237 (1991), and
M.M. Maricq and T.J. Wallington, "Absolute ultraviolet cross sections of methyl and ethyl peroxy radicals," J. Phys. Chem. 96, 986-992 (1992).

The data were fitted to the Sulzer-Wieland function

σ = σmax × exp{-a [ln (ν - νmax)]2}

which yielded

σmax = 4.26×10-18 cm2·molecule-1, λmax = 237.3 nm, and a = 44.4

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