The ν2 bands of 16O18O16O and 16O16O18O: Line positions and intensities

Abstract Using 0.005-cm−1 resolution room temperature Fourier transform spectra of 18O-enriched ozone samples, an extensive analysis of the ν2 bands of the two isotopes 16O18O16O and 16O16O18O was performed. Vibration-rotation energy levels of both species deduced from these analyses together with the available microwave data were then reproduced using a Watson A-type Hamiltonian leading to accurate vibrational energies and rotational constants for the ground states (000) and first excited vibrational states (010) of these two isotopic species. The following band centers were obtained: ν 2 ( 16 O 18 O 16 O) = 693.3057 cm −1 , ν 2 ( 16 O 16 O 18 O) = 684.6134 cm −1 . Finally, appropriate expansions of the transformed transition moment operators of the two ν2 bands were used to generate a complete list of line positions, intensities, and lower state energies for the two isotopes 16O18O16O and 16O16O18O.