Other
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mss..confete07c&link_type=abstract
"International Symposium On Molecular Spectroscopy, 66th Meeting, Held 20-24 June, 2011 at Ohio State University. http://molspec
Other
Atmospheric Species
Scientific paper
The calibration of remote sensing measurements of the atmosphere of our own and other planetary bodies requires a knowledge of the temperature dependence of spectral line broadening caused by pressure dependent effects. We have extended the frequency comb-referenced measurements of line broadening in the ν_1 + ν_3 band of acetylene at 296 K, reported elsewhere at this symposium, to include low temperature pressure measurements at 175K, 200K and 240K. Additional data at still lower temperatures is currently being obtained. Line shape parameters for self- and nitrogen- broadening, narrowing and shifts have been determined at these temperatures on the assumption of the hard-collision model. This model was found to be the most appropriate in our earlier 296K data fitting. In addition to its intrinsic value, the temperature dependence of the derived parameters can give insight into the reliability of the physical assumptions of the model, and results of our analysis will be presented at the meeting. Acknowledgements: Acknowledgement is made to the Donors of the American Chemical Society Petroleum Research Fund for partial support of this research. CPM gratefully acknowledges support by DOE EPSCoR grant DOE-07ER46361 for work conducted while at the University of Oklahoma. The measurements and analyses were performed under grants NNX09AJ93G and NNX08AO78G from the NASA Planetary and Atmospheres program.
Cich Matthew J.
Hurtmans Daniel
Lopez Gary V.
Mantz Arlan W.
McRaven Christopher P.
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