The ν 1 + ν 3 Bands of 16O 18O 16O and 16O 16O 18O

Abstract

Using 0.003 cm −1 resolution Fourier transform spectra of 18O-enriched ozone around 4.8 μm, the first high-resolution analysis of the ν 1 + ν 3 bands of (OOO)-O-16-O-18-O-16 and (OOO)-O-16-O-16-O-18 has been performed. The experimental rotational energy levels were reproduced satisfactorily with the aid of a Hamiltonian model taking fully into account the vibration-rotation interactions. Indeed, it did not prove possible to fit properly the (101) levels without including in the Hamiltonian model both the Coriolis interactions coupling the levels of (101) with those of (002) and (200) and the Darling-Dennison interaction coupling the levels of (002) with those of (200). In this way reliable vibrational energies and rotational and coupling constants were deduced with the following band-centers: ν 0(ν 1 + ν 3) = 2049.3694 cm −1 for 16O 18O 16O, and ν 0(ν 1 + ν 3) = 2090.3406 cm −1 for 16O 16O 18O.