Far infrared laser assignments and predictions for CO-stretching and CH3-rocking states of optically pumped 13CH3OH

Abstract High-resolution Fourier transform studies of the CO-stretching and CH 3 -rocking bands of 13 CH 3 OH have been applied to the assignment of far-infrared (FIR) laser transitions optically pumped by CO 2 infrared (IR) lasers. The assignments are based on spectroscopic identification of the IR pump transitions at the reported offsets from the CO 2 laser lines and agreement between the FIR laser wavenumbers and values calculated from IR/FIR combination-loop relations. Wavenumbers are also predicted for further potential new FIR laser lines in transition systems that could be pumped by CO 2 and 13 CO 2 cw and waveguide lasers.