H. R. INFRARED SPECTRUM OF $^{18}O_{3}$: AANALYSIS OF THE TRIAD $2\nu_{1}$, $\nu_{1}+\nu_{3}$ and $2\nu_{3}$

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 Title: H. R. INFRARED SPECTRUM OF $^{18}O_{3}$: AANALYSIS OF THE TRIAD $2\nu_{1}$, $\nu_{1}+\nu_{3}$ and $2\nu_{3}$ Creators: Barbe, A.; Bouazza, S.; Plateaux, J. J.; Flaud, J. F.; Camy-Peyret, C. Issue Date: 1991 Abstract: High resolution spectra of $^{18}O_{3}$ in the 5 $\mu m$ have never been recorded up to now. To derive intensities and positions of the lines of isotopic ozone a set of sepctra have been obtained with the new F. T. S. built in Reims [1]. The spectra of 98\% $^{18}O_{3}$ introduced in the absorption cell of 31.2 cm long, at different pressures (9.4 Torrs, 6 Torrs, 4 Torrs) have been performed in one hour, with a signal to noise ratio of 800, at resolution of $0.003 cm^{-1}$ corresponding to a 3 m path difference, using stepping mode. The observed experimental results are derived from least squares fits on line shape. The accuracy is 7 $10^{-1}$ $cm^{-1}$ for wavenumbers and 4\% for absolute intensities. For the analysis we used Watson’s type hamiltonian [2] with 22 constants for each vibrational state (200, 101 and 002) and 9 coupling constants for Coriolis and Darling-Dennisson resonances betwen these states. Finally, we give all the set parameters, a portion of listing with assignments observed and calculated wavenumbers and intensities, as well as standard deviation for $\nu$ and S. URI: http://hdl.handle.net/1811/12459 Other Identifiers: 1991-RF-12