THE 2-NU(2) AND 3-NU(2)-NU(2) BANDS OF OZONE

The infrared spectra of O-16(3), in the range 1300-1500 cm(-1) have be en recorded at high resolution (0.007 cm(-1)), with a large product p x 1 = 32.4 Torr x 3212 cm, and a good S/N ratio congruent to 500. This enables us to observe the 2 nu(2) band with high values of rotational quantum numbers, respectively J less than or equal to 57 and K-a < 16 , and also to observe for the first time the hot band 3 nu(2) - nu(2). The infrared data, combined with the 24 known microwave transitions i n the (020) state, lead to a new set of Hamiltonian parameters. Statis tical aspects of the simultaneous fit of microwave and infrared data a re discussed and predictions of microwave transitions in the (020) sta te are given. The Hamiltonian parameters for (030) are reported, leadi ng to an observation of a quasi linear dependence of rotational consta nts and the centrifugal distortion constant Delta(K) with respect to t he nu(2) quantum number. Transition moment parameters are given for th e 2 nu(2) and 3 nu(2) - nu(2) bands. A complete final calculation of l ine positions and intensities up to J less than or equal to 65 and K-a less than or equal to 20 leads to the integrated band intensity S-nu (2 nu(2)) = (5.328 x 10(-22) cm(-1))/(cm(-2) molecule(-1)) at 296 K, w ith a cut-off of 2 x 10(-26). (C) 1998 Elsevier Science B.V. All right s reserved.