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 / Alkynes,polyynes+radicals / Alkynes / C2H2 / Friedrichs(2002)_875-2000K_174nm(fit)

DATAFILE: C2H2_Friedrichs(2002)_875-2000K_174nm(fit).txt
NAME: acetylene, ethyne
FORMULA: C2H2
AUTHOR(YEAR): Friedrichs(2002)
T: 875-2000K
λ: 174nm(fit)
BIBLIOGRAPHY: G. Friedrichs, D.F. Davidson, and R.K. Hanson, "Direct measurements of the reaction H + CH2O → H2 + HCO behind shock waves by means of Vis–UV detection of formaldehyde", Int. J. Chem. Kinet. 34, 374-386 (2002); DOI: 10.1002/kin.10059
COMMENTS: HC≡CH

Shock heating of acetylene/argon mixtures

A microwave N2 discharge lamp was used to generate light of 174 nm

Smooth fit for the temperature dependence of the effective extinction coefficient α(T) in cm2/mol (base e) for T = 875-2200 K:

log α(T) = 6.02 + 2.11×10-5 T

converted to absorption cross sections (conversion factor α(T) → σ(T) is 1.66×10-24)

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