The ν2 bands of 18O 3, 18O 16O 18O, and 16O 18O 18O: Line positions and intensities

Abstract

Using 0.005 cm −1 resolution Fourier transform spectra of an 18O-enriched ozone sample, an extensive analysis of the ν 2 bands of the three isotopic species 18O 3, 18O 16O 18O, and 16O 18O 18O has been performed for the first time. For each isotopic species, the infrared vibration-rotation energies obtained from this analysis, together with the available microwave transitions in the ground state, were reproduced within their experimental uncertainties using a Watson A-type Hamiltonian. The following band centers were obtained: v 2( 18O 3) = 661.49248 cm −1 v 2( 18O 16O 18O) = 668.08496 cm −1 v 2( 16O 18O 18O) = 677.50382 cm −1. In addition, precise rotational and centrifugal distortion constants were obtained both for the ground state and for the first vibrational state (010) of the three isotopic species. Appropriate expansions of the transformed transition moment operators of the three ν 2 bands were used to generate a complete list of line positions, intensities, and lower-state energy levels for the 18O 3, 18O 16O 18O, and 16O 18O 18O isotopic species.