Ozone : Critical Evaluation of the Statistics of the Dark State Analyses via New Observations

Details Ozone : Critical Evaluation of the Statistics of the Dark State Analyses via New Observations Ozone : Critical Evaluation of the Statistics of the Dark State Analyses via New Observations

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..confetg12b&link_type=abstract

"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec

Computer Science

Infrared/Raman

Scientific paper

The analyses of high resolution infrared spectra of ozone very often require the introduction of perturbing rovibrational states for which no corresponding transitions are observed. It is customary to call these bands (respectively states) dark bands (dark states). These bands have weak dipole transition moments, as in the case of ozone, there is no bands forbidden by the symmetry. In consequence, this denomination depends of the signal/noise ratio of the experimental spectra. Recent progress in the theory and improvements of sensitivity of experiments are continuously achieved, allowing us to assign five B type bands, which were considered as dark in recent previous works. These bands are 3ν_2+4ν_3, 5ν_1+ν_2, ν_1+2ν_2+4ν_3 for ^{16}O_3 and 2ν_1+4ν_2+2ν_3, 3ν_1+4ν_3 for ^{18}O_3. As a lot of information coming from dark states (band centres, rotational constants) is useful for the Potential Energy Surface (P.E.S) determination, one needs realistic error bars to make consistent comparisons. These new data offer excellent opportunities to compare these error bars (now correctly known) with those previously derived from the dark state fits. This is the aim of this presentation.

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