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dc.creatorO'Brien, James J.en_US
dc.creatorSingh, K.en_US
dc.date.accessioned2006-06-15T15:33:31Z
dc.date.available2006-06-15T15:33:31Z
dc.date.issued1996en_US
dc.identifier1996-TA-04en_US
dc.identifier.urihttp://hdl.handle.net/1811/13598
dc.descriptionACKNOWLEDGEMENTS This work was supported by grant NAGW-2479 from the Planetary Atmospheres Program of NASAen_US
dc.descriptionAuthor Institution: Department of Chemistry and Center for Molecular Electronics, University of Missouri-St. Louisen_US
dc.description.abstractThe technique of intracavity laser spectroscopy has been used to obtain methane absorption spectra for the vibrational overtone bands that occur around 703 nm and 727 nm. Absorption coefficients for the 690-742 nm range have been obtained for a sample temperature of 77 k at a spectral resolution of $<0.02$ $cm^{-1}$. A new method of data analysis is utilized in obtaining the results. It involves deconvolving the many ILS spectral profiles that comprise the absorption bands and summing the results. Values averaged over $1 cm^{-1}$ and 1 \AA intervals are provided. Band strengths also are obtained. The total intensities of the 703 and 727 nm bands are in reasonable agreement with previous laboratory determinations which were obtained for relatively high pressures of methane at room temperature using lower spectral resolution. The methane bands appear in the reflected sunlight spectra from the outer planets. Results averaged over 1 nm intervals are compared with other laboratory studies and with those derived from observations of the outer planets. The band profiles differ considerably from other laboratory results but are in good accord with the planetary observations. Laboratory spectra of methane at appropriate conditions are required for the proper interpretation of the observational data. Absorption spectra can provide some of the most sensitive diagnostic data on the atmospheres of those bodies.en_US
dc.format.extent128433 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleABSORPTION COEFFICIENTS AND BAND STRENGTHS FOR THE 703 NM AND 727 NM BANDS OF METHANE AT 77 Ken_US
dc.typearticleen_US


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