Analysis of new measurements of 18O-substituted isotopic species 16O16O18O and 16O18O16O of ozone in the THz and far-infrared ranges
E.N. Starikova1,2, A. Barbe3, L. Manceron4,5, B. Grouiez3, J. Burgalat3, V.G. Tyuterev1,2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2National Research Tomsk State University, Tomsk, Russia
3Groupe de Spectrométrie Moléculaire et Atmosphérique, UMR CNRS 7331, UFR Sciences Exactes et Naturelles, Reims, France
4Synchrotron SOLEIL, Beamline AILES, L'Orme des Merisiers Départementale, Saint-Aubin, France
5Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA) UMR CNRS 7583, Créteil, France
Keywords: ozone, isotopic modification, effective Hamiltonian model, rotational band, ν-ν and ν bands
Abstract
High-resolution spectra corresponding to the rotational and the ν2-ν2 bands of the two most abundant isotopic species of ozone with one heavy 18O oxygen atom were recorded using SOLEIL synchrotron radiation source in the range 30-200 cm-1. Additionally, the ν2 vibrational-rotational bands were recorded between 550 and 880 cm-1 using a classical glowbar source that made it possible to extend and refine information compared to published data on the observed transitions of these bands. The analyses of recorded spectra permitted us to deduce experimental set of energy levels for the ground (000) and the first bending (010) vibrational states, which significantly exceeds literature data in terms of rotational quantum numbers. For both isotopic species, the weighted fits of all experimental line positions were carried out including previously published microwave data. As a result of this work, the improved values of rotational and centrifugal distortion parameters for the states (000) and (010) were obtained that permitted modelling the experimental line positions with a weighted standard deviation of 1.284 (2235 transitions) and 0.908 (4597 transitions), respectively, for 16O16O18O, and 1.168 (824 transitions) and 1.724 (2381 transitions) for 16O18O16O.
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