Abstract
We have oberved microwave spectra of the inert gas diatomic ions He+2, HeAr+, HeAr+ and NeAr+. The spectra arise from transitions between levels which are within a few cm-1 of the lowest dissociation limit. We use mass-selected ion beams which pass first through a waveguide cell, and then through an electric field lens in which selective fragmentation of weakly bound levels occurs. Fragment ions produced in the lens are separated by an electrostatic analyser and detected; spectra are observed by measuring changes in the fragment ion currents. The results are discussed in terms of a theoretical model which relates the high-lying vibration-rotation levels of the diatomic ions to their atomic dissociation limits.
| Original language | English |
|---|---|
| Pages (from-to) | 473-479 |
| Number of pages | 7 |
| Journal | Chemical Physics Letters |
| Volume | 212 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 17 Sept 1993 |
Bibliographical note
Funding Information:informative discussions,p articularly in connection with the observedis otopee ffectsa, nd Dr. J.M. Brown for sharing his insight into the angular momenta couplingi n diatomicm oleculesA. C thankst he Royal Societyf or a ResearchP rofessorshipC, AL thankst he SERC for an AdvancedF ellowship,A MS thankst he Royal Society for a ResearchF ellowship and YDW thanks the University of Southamptonf or a Research Fellowship. MRV thanks BP International Limited for a researchs tudentshipW. e are indebted to the SERC for researchs tudentshipst o AJM and CHP and for grants towards the purchase of equipment.
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry