CRDS spectroscopy of O-18(3). Part 2: Analysis of six interacting bands between 5930 and 6080 cm(-1)

The absorption spectrum Of 1803 has been recorded in the 5930-6080 cm(-1) region using CW-Cavity Ring Down Spectroscopy. 1888 transitions belonging to five bands have been assigned. Three of them are A-type bands: 2 nu(2) + 5 nu(3), nu(1) + nu(2) + 5 nu(3) and 5 nu(1) + nu(3), and two bands are of B-type: 2 nu(1) + nu(2) + 4 nu(3) and 4 nu(1) + 3 nu(2). Despite a complex spectral pattern perturbed by many rovibrational resonances, it has been possible to find a suitable effective Hamiltonian model reproducing all the transition wavenumbers (corresponding to 1016 energy levels) with an rms deviation of 9.5 x 10(-3) cm(-1). A set of 721 line intensities was determined and fitted to derive the effective transition moment parameters. This set of parameters and the experimental energy levels were used to generate a complete line list of 2795 transitions allowing to generate synthetic spectrum in good agreement with the experimental spectrum. (C) 2009 Elsevier Inc. All rights reserved.