The production rates of zinc, cadmium and mercury ions in their ground states, relative to those leading to excited-state formation, in thermal-energy charge-transfer collisions with He+ ions have been measured in a flowing afterglow. In the cases of cadmium and mercury cross sections for ground-state production are very small compared to those for excited-ion production. Although a full analysis of the zinc system cannot yet be carried out, it is likely that a similar result will hold. The results have been explained in terms of pre-emption of the molecular curve crossings in the Landau-Zener model. From this evidence the authors conclude that the present power limitations of the helium-metal-vapour laser are not determined by atomic processes of this type.
|Number of pages||7|
|Journal||Journal of Physics B: Atomic and Molecular Physics|
|Publication status||Published - 1979|