THE EFFECTS OF A STRONG CORIOLIS RESONANCE ON ROVIBRATIONAL LINE-INTENSITIES OF (HCNO)-C-13

Fourier transform far infrared spectra of the 13C species of fulminic acid, H13CNO, were used to obtain relative intensities of six rovibrational bands perturbed by a strong Coriolis resonance and by l-type resonance. The calculated intensities of the individual rovibrational absorption lines were obtained as an extension of our model of the strong Coriolis resonance between the (v4v5)l = (02)0e and (10)1e levels leading to global intensity perturbations in the bands involved. The ratio of the vibrational transition moments M0←0(v) and M0←1(v) for the transitions (11)0e ← (02)0e (normally forbidden) and (11)0e ← (10)1e (allowed) was determined to be 0.1623(29), and a positive sign was found for the product WM0←0(v)M0←1(v), where W is the Coriolis resonance matrix element. Herman-Wallis correction factors were explored. The results of teh analysis show that valuable intensity information can be obtained even from a moderately dense rovibrational spectrum with a signal-to-noise ratio of no more than 100. © 1991.