Detection and analysis of three highly excited vibrational bands of 16O3 by CW-CRDS near the dissociation threshold. (February 2015)

• Record Type: Journal Article
• Authors: Campargue, A.; Kassi, S.; Mondelain, D.; Barbe, A.; Starikova, E.; De Backer, M.-R.; Tyuterev, Vl.G.
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 152(2015:Feb.)
• Page Start: 84
• Page End: 93
• Publication Date: 2015-02
• Subjects: Ozone -- CW-cavity ring down spectroscopy -- Resonance coupling -- Effective Hamiltonian model -- Potential energy surface; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2014.10.019
• Languages: English
• ISSNs: 0022-4073

Abstract

Abstract: The present contribution is devoted to the analysis of three extremely weak A-type bands of 16 O3 recorded near 7686, 7739 and 7860 cm −1 i.e. only a few % below the dissociation limit, D 0, at about 8560 cm −1 . They correspond to the most excited vibration–rotation states of ozone observed so far via high-resolution absorption spectroscopy. They were detected by high sensitivity CW-cavity ring down spectroscopy with a typical noise equivalent absorption, α min, on the order of 2×10 −10 cm −1 and modelled using the effective operator approach. The derived band centres and rotational constants show a very good agreement with recent theoretical predictions based on a new ab initio potential energy surface. Highlights: Cavity ring down spectroscopy of 16 O3 between 7600 and 7920 cm −1 . 531 Transitions assigned to three vibrational bands. Upper vibrational states located only a few % below the dissociation limit. Effective operator modelling of the spectra. Good agreement with ab initio values for the band centres and rotational constants.