Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 8: Poster I

A 8.29: Poster

Dienstag, 9. März 2010, 16:30–19:00, Lichthof

Electron impact ionization of small rare gas clusters — •Thomas Pflüger, Arne Senftleben, Xueguang Ren, Alexander Dorn, and Joachim Ullrich — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Atomic and molecular clusters present an excellent field of investigation bridging the gap between sole constituents and macroscopic matter. Therefore, structural as well as dynamical information can contribute to the understanding of more complex systems. Especially small argon clusters have been extensively studied for decades, however, coincidence experiments are rare. We performed kinematically complete electron impact ionization experiments were all final state particles were measured and differential cross sections could be obtained. Besides direct single ionization the results show a second distinct reaction channel which can be accounted for an additional inelastic scattering event inside the cluster. Furthermore, compared to the results for atomic argon, strongly increased intensities outside of the scattering plane, which is spanned by the incident and scattered projectile, are observed.