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[39.04] Methane Absorption Coefficients in the 750-940 nm region derived from Intracavity Laser Absorption Spectral Measurements

J.J. O'Brien (Chemistry and Biochemistry, University of Missouri-St. Louis)

The absorption spectrum of methane has been recorded in the visible to near-IR region using the intracavity laser spectroscopy technique. Spectra are recorded at high spectral resolution for narrow overlapping intervals in the region for room and 77 K temperature methane samples. After spectra are deconvolved for the instrument function, absorption coefficients are derived. These will be presented (750-940 nm for room temperature methane; 850-920 nm for 77 K methane) and compared with results reported by other workers. Future work in this area also will be indicated.

Support from NASA’s Planetary Atmospheres Program (NAG5-6091 and a Major Equipment Grant) is gratefully acknowledged.

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Bulletin of the American Astronomical Society, 34, #3< br> © 2002. The American Astronomical Soceity.