THE NU(1)+NU(3) BANDS OF (OOO)-O-16-O-18-O-16 AND (OOO)-O-16-O-16-O-18

Using 0.003 cm-1 resolution Fourier transform spectra of O-18-enriched ozone around 4.8 mum, the first high-resolution analysis of the nu1 + nu3 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: nu0(nu1 + nu3) = 2049.3694 cm-1 for (OOO)-O-16-O-18-O-16, and nu0(nu1 + nu3) = 2090.3406 cm-1 for (OOO)-O-16-O-16-O-18. (C) 1994 Academic Press, Inc.