Infrared emission spectroscopy at 100 μm. Vibration—rotation spectrum of CsI
✍ Scribed by V. Braun; B. Guo; K.-Q. Zhang; M. Dulick; P.F. Bernath; G.A. McRae
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 442 KB
- Volume
- 228
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The vibration-rotation emission spectrum of CsI was recorded in the 110-130 cm-1 region of the spectrum. Although individual rotational lines were not resolved, we measured the positions of 29 band heads involving the vibrational bands from 1-0 to 30-29. These vibrational data when combined with previously measured microwave and millimeter-wave pure rotational transitions yielded improved Dunham constants. In addition, an experimentally derived Born-Oppenheimer potential is also reported and compared with the purely ionic internuclear potential of the Rittner model. The results reported here demonstrate that far-infrared emission spectroscopy is a very sensitive technique for detecting high-temperature molecules, even at wavelengths around 100 ~tm.