Angular-Differential Studies of Excitation in Quasi-One-Electron Collisions at "High" Energy
Qualitative differences have been observed between two types of "quasi-one-electron" collision systems. We have studied valence-electron excitation at "high" energy (relative collision velocities up to 0.5 a.u.) in the Mg++He and Na++H collision systems, and find that while Mg++He collisions are dominated by "direct" excitation, the Na++H collisions exhibit significant "molecular" excitation, even at the highest velocities. This behavior can be understood in terms of the molecular structure of the respective collision complexes, and the energy separation between the ground and first excited states of the valence electron.
E. Redd et al., "Angular-Differential Studies of Excitation in Quasi-One-Electron Collisions at "High" Energy," Physical Review A, vol. 36, no. 7, pp. 3475-3478, American Physical Society (APS), Oct 1987.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.36.3475
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