New far-infrared laser lines and assignments for {sup 13}CH{sub 3}OH methanol
- Molecular Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
- Department of Physics, University of New Brunswick, Fredericton, New Brunswick (Canada) E3B 5A3
- Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80303 (United States)
The {sup 13}CH{sub 3}OH isotopomer of methanol has been reinvestigated as a source of far-infrared (FIR) laser emission by the use of the extended line coverage available from an efficient CO{sub 2} laser recently developed for optical pumping. With this system we have observed 19 new FIR laser lines, pumped by 11 different CO{sub 2} transitions, with five of the pump lines belonging to the new 9{ital HP} CO{sub 2} hot band. Accurate heterodyne frequency measurements of the FIR laser and the pump offset have been made for 16 FIR laser lines, including three previously reported in the literature. High-resolution Fourier-transform spectroscopic results for the CO-stretching and the CH{sub 3}-rocking infrared fundamentals of {sup 13}CH{sub 3}OH have been applied to assign the pump and lasing lines for five of the transition systems. One system has the novel feature that two different CO{sub 2} pump lines excite the same upper level, and hence two FIR laser lines of the identical frequency are observed for two different pump lines. {copyright} {ital 1995 Optical Society of America.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 253460
- Journal Information:
- Journal of the Optical Society of America, Part B: Optical Physics, Journal Name: Journal of the Optical Society of America, Part B: Optical Physics Journal Issue: 12 Vol. 12; ISSN JOBPDE; ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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