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: photoabsorption cross sections

                
Authors: S.L. Bragg, S.A. Lawton, C.E. Wiswall  

Title: Absolute measurements of absorption at the iodine-laser frequency in atmospheric gases

Journal/Source: Optics Letters, 10 (7), 321-323, (1985); doi:10.1364/OL.10.000321


Data: 

Energy/Wavelength range: 14076 cm-1 (710.429 nm)

Resolution: 

Temperature: 

Temperature dependence: 

Pressure/Concentration: 

Phase: gas

pH:


Comments: The absorption cross sections at the chemical-iodine-laser frequency for methane and carbon dioxide in an 
atmosphere of dry air were determined with a photoacoustic cell to be (8 ± 2) × 10-24 and (5.4 ± 0.4) × 10-25 cm2, respectively. 

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