Observation of a microwave spectrum of the long-range He … H 2+ complex
Abstract
We report the first spectroscopic observations of the HeH 2+ molecular ion. We use an ion beam technique in which mass-selected ions are exposed to microwave radiation, and transitions involving weakly bound long-range levels are detected by means of state-selective electric field dissociation. One of the observed transitions exhibits complex proton nuclear hyperfine structure; another shows a simple field-free spectrum but extensive Zeeman structure in the presence of an applied magnetic field. The results are discussed in terms of coupled-channel calculations using a recent ab initio potential surface.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- September 1996
- DOI:
- 10.1016/0009-2614(96)00860-3
- Bibcode:
- 1996CPL...260..395C