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

Using 0.003-cm(-1) resolution Fourier transform spectra of O-18-enrich ed ozone around 4.8 mu m, the first high-resolution analysis of the v( 1) + v(3) bands of (OOO)-O-16-O-18-O-18 and (OOO)-O-18-O-16-O-18 has b een performed. The experimental rotational levels derived from the ana lysis were very satisfactorily calculated using a Hamiltonian model wh ich takes into account the necessary interactions. More precisely, for (OOO)-O-18-O-16-O-18, the Coriolis-type interactions coupling the lev els of(101) with those of(002) and (200), as well as the Darling-Denni son interaction between (002) and (200), were considered. For the nons ymmetrical species (OOO)-O-16-O-18-O-18, it proves necessary to includ e Coriolis-type interactions coupling the levels of(101) with those of (002) and (030). In this way, satisfactory fits were obtained, leadin g to the following band centers: v(0)(v(1) + v(3)) = 2060.0720 cm(-1) for (OOO)-O-18-O-16-O-18 and v(0)(v(1) + v(3)) = 2027.5825 cm(-1) for( 16)O(18)O(18)O. (C) 1995 Academic Press, Inc.