Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Interaction of matter with ions I
A 12.4: Vortrag
Dienstag, 15. März 2011, 15:00–15:15, BAR 106
Two-electron transfer in collisions of highly charged ions with ultracold Na atoms — •Ina Blank1, Corine Meinema1, Ronnie Hoekstra1, Simone Götz2, Bastian Höltkemeier2, and Matthias Weidemüller2 — 1KVI, Atomic and Molecular Physics, Zernikelaan 25, NL-9747 AA Groningen, the Netherlands — 2Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany
The process of two-electron transfer in collisions of ions with atoms is an example of many-particle dynamics of a Coulomb system. We have investigated two-electron transfer in collisions of O6+ with Na(3s). The electron transfer is studied by precisely measuring the momentum of the recoils ions. The target is provided by a magneto-optical trap. Two different reaction mechanisms are observed: Final states O4+(3ln’l’) with n’≥5 are created by sequential electron transfer, while the two electrons captured into the O4+(3l3l’) states are transferred simultaneously. Energy dependent measurements reveal an increase of the simultaneous electron transfer with decreasing energy.