Collision spectroscopy with aligned and oriented atoms. II. Charge exchange in He+-Na(3p) collisions
- 28 October 1989
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 22 (20) , L585-L589
- https://doi.org/10.1088/0953-4075/22/20/002
Abstract
Electron capture processes in the He+-Na(3p) collision are experimentally investigated in the 0.5-3 keV energy range using time of flight spectroscopy. The excited target is produced with a defined alignment or orientation by laser pumping. The sigma 3p/ sigma 3s ratio of total cross sections for charge exchange in the He+-Na(3p) and He+-Na(3s) collisions is measured and enables a first evaluation of the sigma 3p cross section which amounts to 70 AA2 at keV energies. The He*(n=2) and He*(n=3) channels are populated: the He*(n=2) reaction is dominant at low energies whereas the He*(n=3) reaction becomes important at higher energies and/or scattering angles.Keywords
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