Abstract
The analysis of high-resolution spectra of 18O3 is reported here for the range 3100–5000 cm−1. Eight sets of polyads, corresponding to eight newly observed bands and accounting for resonance perturbations with eight other “dark” states, are analyzed for the first time. These analyses lead to eight sets of spectroscopic parameters, band centers, and rotational and centrifugal distortion constants, as well as transition moment parameters. In addition, various resonances are studied and compared to the similar ones for 16O3. This study allows us to check the work on 16O3 and to confirm that the accidentally strong high-order Δv=8 anharmonic resonance for bands 5 ν3↔3ν1+ν2+ν3 was an exceptional case of the major isotopic species.
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