Darmstadt 2008 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 6: Interaction of matter with ions
A 6.1: Vortrag
Dienstag, 11. März 2008, 08:30–08:45, 3D
A MOTRIMS experiment on the energy dependence of double electron transfer — •Ina Blank1, Simone Götz1, Terry Mullins1, Wenzel Salzmann1, Roland Wester1, Matthias Weidemüller1, Valeriu Gabriel Hasan2, Reinhard Morgenstern2, and Ronnie Hoekstra2 — 1Physikalisches Institut, Universität Freiburg, Hermann-Herder Str. 3, 79104 Freiburg, Germany — 2KVI - Atomic Physics, University of Groningen, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands
We present the first results on the energy dependence of state-selective double-electron capture in ion-alkali collisions. Experiments are performed with an O6+ projectile beam, passing through a cloud of sodium atoms, stored in a magneto-optical trap. State resolved double electron transfer is observed by detecting Na2+ ions using Recoil-Ion-Momentum-Spectroscopy [1]. Laser cooling of target atoms ensures high momentum resolution due to low initial thermal momenta. Projectile ion energies are varied from 4.5 to 8.6 keV/amu. Recoil momenta of Na2+ ions reveal double transfer of outer and inner shell target electrons, principally into 3ln’l’ states of the downcharged projectile [2]. Due to the short interaction times for transfer into 3l3l’ states, double transfer into this channel is expected to occur simultaneously which suggests that coherent multi-particle correlations may be investigated via this process.
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