CW-Cavity Ring Down Spectroscopy of 18O3. Part 3: Analysis of the 6490-6900 cm−1 region and overview comparison with the 16O3 main isotopologue

The results of the analyses of the whole 5930-6900 cm−1 spectral region were gathered and used for a comparison of the band centres to their calculated values. The agreement achieved for both 18O3 and 16O3 (average difference on the order of 1 cm−1) indicates that the used potential energy surface provides accurate predictions up to a vibrational excitation approaching 80% of the dissociation energy. The comparison of the 18O3 and 16O3 band intensities is also discussed, opening a field of questions concerning the variation of the dipole moments and resonance intensity borrowing by isotopic substitution.