Berlin 2001 – wissenschaftliches Programm

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A: Atomphysik

A 14: Ion Scattering II (with molecules and surfaces)

A 14.1: Vortrag

Donnerstag, 5. April 2001, 15:45–16:00, H1028

Charge Transfer in Collisions between Molecular and Atomic Ions — •H. Bräuning¹, I. Reiser², A. Diehl¹, A. Theiß¹, C.L. Cocke², E. Sidky², and E. Salzborn¹ — ¹Institut für Kernphysik, Justus-Liebig-Universität, Leihgesterner Weg 217, D-35392 Giessen, Germany — ²Kansas State University, Dept. of Physics, Manhattan, Kansas, USA

Collisions between ions have attracted great interest in the recent years as they have many applications like e.g. in plasma physics or storage ring designs. They also allow to study basic collision processes in specially tailored systems like pure single electron systems. We have extended our studies towards collisions of molecular ions with atomic ions. Measured absolute cross sections for charge transfer in collisions of H₂⁺ with He²⁺ and Ar²⁺ followed by subsequent break-up of the molecule will be presented. Especially the first system is very interesting for theory, as it is a pure one electron system, but with a 3-center nuclear potential during the collision. First indications of a molecular alignment for charge transfer as has been widely found in collisions with neutral ions will be discussed.