Further evidence for perturbations in the infrared spectra of carbonyl sulfide

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Abstract

The vibration-rotation spectra of the OCS molecule are studied between 3600 and 7000 cm−1 with a new Ebert-type evacuated grating spectrometer. Four new transitions are used to determine fundamental constants of the molecule. An attempt is made to calculate the importance of Fermi resonance. A perturbation of the 2ν1 + ν3 band is reported. The 2420 level which lies 10 cm−1 from the 2001 level may be indirectly responsible for this perturbation.

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