science-softCon uv/vis+ spectra data base;	www.uv-spectra.de; (C) science-softCon 2012

Substance: ethene				Other Names: ethylene

Formula:	C2H4				CAS-No.: 74-85-1

Study: uv absorption cross sections, photolysis, quantum yields

                
Authors: R. Kamps, H. Mueller, M. Schmitt, S. Sommer, Z. Wang, K. Kleinermanns

Title: Photooxidation of exhaust pollutants: I. Degradation efficiencies, quantum yields and products of benzene photooxidation

Journal/Source: Chemosphere, 27 (11), 2127-2142, (1993)


Data: (diagram, table, disk): table

EnergyWavelength range: 185 nm

Resolution: 

Temperature: 

Temperature dependence: 

Pressure/Concentration:

Phase (gas, liquid, solid): gas

pH:


Comments: For determination of absorption cross sections a narrow band Hg-low pressure lamp with defined emission bands
at 185 nm and 254 nm was used.
Benzene as well as acetone show structured absorption spectra in the 254 nm region so that the absorption cross sections depend
fundamentally on the spectrometer bandwidth. The absorption cross sections measured with the Hg-lamp were considerably higher
than the broadband values in the literature.
For acetone sigma(185 nm) = 3.1 x 10-19 (cm2/molecule) and Phi(185 nm) = 0.7

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