Computer Science
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confete01l&link_type=abstract
"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec
Computer Science
Atmospheric Species
Scientific paper
The knowledge of accurate spectroscopic parameters for the a1Δg←X3Σ-g band of molecular oxygen near 1.27 μm is very important in the field of remote sensing. Although this band was studied by spectroscopists for over a century a lot of discrepancies still remain in the previously reported line positions and intensities. In this work the Continuous Wave-Cavity Ring Down Spectroscopy (CW-CRDS) technique has been used to record with high sensitivity the absorption spectrum of this band. The spectra were obtained between 7640 and 7917 cm-1 with ``natural'' oxygen and with a sample highly enriched in 18O. The absolute intensities of 377 and 652 oxygen transitions were measured in the two spectra, respectively. They include the a1Δg←X3Σ-g (0-0) bands of 16O2, 16O18O, 16O17O, 17O18O and 18O2. The (0-0) bands of 16O2 and 18O2 show (previously undetected) electric quadrupole transitions with line intensities ranging from 1×10-30 to 1.9×10-28 cm/molecule. They are accompanied by the a1Δg←X3Σ-g (1-1) hot bands which are also reported for the first time. Accurate spectroscopic parameters for the observed bands were derived from a global fit of the experimental line positions, combined with microwave and Raman measurements available in the literature.
Campargue Alain
Gordon Iouli E.
Kassi Samir
Leshchishina O. M.
Rothman Laurence S.
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