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 mu m.
|Number of pages
|Chemical Physics Letters
|Published - 14 Oct 1994
- COLLISION-INDUCED DISSOCIATION
- ALKALI-HALIDE MOLECULES