Abstract

The infrared radio-frequency double-resonance technique has been used to study seven sets of coupled transitions involving torsionally excited states of the vibrational ground state and the CO-stretch state of CH₃OH. One double-resonance signal due to a transition in the CH₃-deformation state has also been observed. The observations confirm previously proposed assignments of far-infrared laser lines and have allowed the determination of A-state asymmetry parameters, including S^CO(122), T^CO(122), and S^CH₃-def(013).

© 1990 Optical Society of America

Infrared–infrared double-resonance spectra of ¹³CH₃OH and ¹²CH₃OH

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