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Optoacoustic spectroscopy of C2H4 at the 9- and 10-μm C12O216 laser wavelengths

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Abstract

Absorption coefficients have been measured for ethylene in the 9- and 10-μm range with a photoacoustic spectrophone. Pressure dependency in the 10P C12O216 range was studied for various concentrations of ethylene. Comparisons of the data with other measurements of both atmospheric and pressure-dependent absorption coefficients were also made, and a method for relating ethylene pressure-dependency data on absorption to molecular structure was examined. Typical discrepancies between up to six independent measurements of ethylene absorption were 38.1% at the 10-μm R(20) line, 4.4% at the 10-μm P(18) line, and 18.5% at the 10-μm P(26) laser line.

© 1982 Optical Society of America

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