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, Impressum, 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 / Alkynes,polyynes+radicals / Alkynes / C2H2 / Friedrichs(2002)_2000K_174nm

DATAFILE: C2H2_Friedrichs(2002)_2000K_174nm.txt
NAME: acetylene, ethyne
AUTHOR(YEAR): Friedrichs(2002)
T: 2000K
λ: 174nm
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

Shock heating of acetylene/argon mixtures

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

Temperature dependence for the effective cross sections α(T) in cm2/mole for T = 875-2000 K:

log10 α(T) = 6.02 - 2.11 × 10-5 T

Fig. 4 shows decreasing absorption with increasing temperature, so the equation in Table II has been corrected, i.e., minus sign instead of plus sign

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