Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 8: Poster HU 1
A 8.38: Poster
Samstag, 5. März 2005, 08:30–18:30, Poster HU
Inner- and outer-shell electron dynamics in H+-Na collisions — •M. Zapukhlyak1, T. Kirchner1, H.J. Lüdde2, S. Knoop3, R. Morgenstern3, and R. Hoekstra3 — 1Institut für Theoretische Physik, TU Clausthal, Leibnizstraße 10, 38678 Clausthal-Zellerfeld — 2Institut für Theoretische Physik, Universität Frankfurt, Robert-Mayer-Straße 8-10, 60054 Frankfurt — 3KVI, Atomic Physics, Rijksuniversiteit Groningen, Zernikelaan 25, NL 9747 AA Groningen, The Netherlands
Electron transfer and ionisation in H+-Na collisions are dominated by one-electron transitions of the initial Na(3s) electron. Accordingly, one-electron descriptions with frozen inner target electrons were employed in previous theoretical works. However, inner-shell capture was observed very recently in a MOTRIMS (Magneto Optical Trapping Recoil Ion Momentum Spectroscopy) experiment [1] calling for a more complete treatment of the collision system.
In the present study the basis generator method [2] is used to propagate all initially occupied orbitals of the Na atom in an effective single-particle potential made up of the Coulomb potentials of the nuclei and a term that accounts for the electron-electron interaction. The single-particle solutions are then analysed on the level of the independent particle model. We address inner- and outer-shell capture and ionisation in the 2–100 keV impact energy regime. Detailed comparisons with previous and, in particular, with new MOTRIMS experiments will be presented, and the role of multi-electron dynamics will be discussed.
[1] S. Knoop et al., Phys. Rev. A (to be published)
[2] O.J. Kroneisen et al., J. Phys. A 32, 2141 (1999)