Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.4813h&link_type=abstract
American Astronomical Society, DPS meeting #42, #48.13; Bulletin of the American Astronomical Society, Vol. 42, p.972
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Accurate ultraviolet photoabsorption cross sections of polyatomic molecules are essential tools for reliable modeling of the photochemistry of planetary atmospheres. Extensive experimental data already have been recorded and published, but they are of uneven spectral resolution and coverage, and in many cases, are unavailable in computer-readable forms needed for incorporation in modeling calculations. Furthermore, most laboratory investigations have been conducted at room temperature. Perhaps most serious is that there are relatively few published assessments or critical evaluations of absolute calibration and reliability, or which laboratory experiments should be most trusted.
Here we report the results of critical evaluation of the ultraviolet photoabsorption cross section of the carbon dioxide molecule, CO2, the principal component of the atmospheres of Venus and Mars, and an important component of comets. By careful comparison and selection of data from published laboratory investigations we have assembled, documented, analyzed, recommended, and make available a data file of absorption cross sections at 25,016 wavelengths between 0.125 and 201.6 nm at room temperature.
The data file will be submitted to the Mainz spectroscopy archive and is currently available online at http://www-mpl.sri.com/data/CO2uv300.html
Berkowitz Jeremy
Huestis David L.
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