Far Infrared (FIR) And Infrared (IR) Spectroscopy Of Methanol Applied To FIR Laser Assignments

R M Lees

doi:10.1117/12.938831

26 September 1986 Far Infrared (FIR) And Infrared (IR) Spectroscopy Of Methanol Applied To FIR Laser Assignments

R M Lees

Proceedings Volume 0666, Far-Infrared Science and Technology; (1986) https://doi.org/10.1117/12.938831
Event: 1986 Quebec Symposium, 1986, Quebec City, Canada

Abstract

High-resolution Fourier transform spectra of methyl alcohol have been investigated in the FIR and IR regions from 40-300 cm and 950-1100 cm-1, respectively. A principal aim was to confirm and extend identifications of transitions contributing to the rich FIR laser emission known to be obtained by optically pumping methanol vapour with CO₂ lasers. The general structures of the energy levels and spectra are discussed, and results and analysis are presented for the normal isotopic species as well as the C^-13and 0-18 isotopic forms. The technique of forming closed frequency combination loops is described, with application to the rigorous confirmation of transition assignments and improvement of frequency accuracies of reported FIR laser lines. Also outlined are some recent novel assignments of high-frequency TEA-laser-pumped FIR laser lines as torsional refilling transitions within the vibrational ground state.

Citation Download Citation

R M Lees "Far Infrared (FIR) And Infrared (IR) Spectroscopy Of Methanol Applied To FIR Laser Assignments", Proc. SPIE 0666, Far-Infrared Science and Technology, (26 September 1986); https://doi.org/10.1117/12.938831

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