Ion-Rydberg atom collision cross sections
- 14 February 1980
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 13 (3), 483-492
- https://doi.org/10.1088/0022-3700/13/3/012
Abstract
Classical-trajectory Monte Carlo calculations have been performed for collisions of ions in charge states q=+1, +2, +5 and +10 with hydrogenic atoms in principal quantum levels n=1, 2, 5, 10 and 20. The collision velocity range investigated was 1eor=2. For v/ve>or approximately=5, the sum of the charge-exchange (CEX) and impact ionisation (ION) cross sections may be represented by sigma CEX+ION(a02)=6 pi n2q2/v2, where v is in atomic units. Analysis of the electronic levels produced after charge exchange by the ion indicates the capture proceeds into excited levels which tend to preserve the energy and orbital size of the initial Rydberg atom.Keywords
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