science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: methane					Other Names: 

Formula: CH4						CAS-No.: 74-82-8

Study: uv photoabsorption cross sections

                
Authors: L.C. Lee, C.C. Chiang

Title: Fluorescence yield from photodissociation of CH4 at 1060-1420 A

Journal/Source: J. Chem. Phys., 78 (2), 688-691, (1983); doi:10.1063/1.444812


Data: table, diagram

Energy/Wavelength range: 106.0 - 142.0 nm

Resolution: 

Temperature: 293 K

Temperature dependence: no

Pressure/Concentration:

Phase: gas

pH:


Comments: The photoabsorption and fluorescence cross sections of CH4 were measured using synchrotron radiation at 1060-1420 Å. 
The fluorescence starts to appear at 1330 Å, and its cross section increases with decreasing photon wavelengths. The fluorescence 
cross section at 1060 Å is 0.38 x 10-18 cm2, which is much smaller than the theoretical expectation. 

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