Far-infrared laser spectroscopy of methanol: a probe for vibrational mode coupling

Ronald M. Lees

doi:10.1117/12.224243

13 October 1995 Far-infrared laser spectroscopy of methanol: a probe for vibrational mode coupling

Ronald M. Lees

Proceedings Volume 2558, Millimeter and Submillimeter Waves II; (1995) https://doi.org/10.1117/12.224243
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Methanol has a rich torsion-vibration-rotation spectrum extending from the millimeter and submillimeter regions all the way through the far-infrared (FIR) and up to the near IR. High- resolution studies of the lower vibrational modes have revealed numerous perturbations arising from Fermi, Coriolis, and asymmetry resonances. A remarkable number of the perturbed energy level systems contribute to the extensive FIR laser emission observed from methanol isotopomers optically pumped by CO₂ lasers. FIR laser lines involving perturbed IR levels have been invaluable aids in assigning the FIR and IR spectra and thereby locating the specific energy channels through which the CO-stretching, CH₃-rocking and OH-bending vibrational modes interact with eachother, frequently via torsion-mediated coupling.

Citation Download Citation

Ronald M. Lees "Far-infrared laser spectroscopy of methanol: a probe for vibrational mode coupling", Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); https://doi.org/10.1117/12.224243

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