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 / Halogen oxides / Cl oxides / ClO / Feierabend(2010)_218K_279.67nm(10,0)

DATAFILE: ClO_Feierabend(2010)_218K_279.67nm(10,0).txt
NAME: chlorine monoxide
FORMULA: ClO
AUTHOR(YEAR): Feierabend(2010)
T: 218K
λ: 279.67nm(10,0)
BIBLIOGRAPHY: K.J. Feierabend, D.K. Papanastasiou, and J.B. Burkholder, "ClO radical yields in the reaction of O(1D) with Cl2, HCl, chloromethanes, and chlorofluoromethanes", J. Phys. Chem. A 114, 12052-12061 (2010); DOI: 10.1021/jp107761t
COMMENTS: Differential absorption cross section Δσ at the (10,0) band head of the A 2Π ← X 2Π transition, i.e., the difference between the cross sections at the peak at 279.67nm and at the valley of the absorption spectrum at 279.56 nm, measured using cavity ring-down spectroscopy; Cl2O photolysis at 248 nm was the ClO source

Measurements at temperatures between 200 and 296 K, a simulation of the relative temperature dependence of the ClO absorption cross sections (using available spectroscopic parameters) over the range 190-320 K, and an empirical polynomial fit of the temperature dependence yielded

Δσ(T)/Δσ(296 K) = 3.5234 - 0.014486 T + 2.0137×10-5 T2

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