Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 8: Poster I

A 8.35: Poster

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

Fully differential measurements for electron capture in collisions of slow He^q+ and Ne^q+ with He and Ne. — •Aditya H. Kelkar, Xincheng Wang, Daniel Fischer, Robert Moshammer, and Joachim Ullrich — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

We report on kinematically complete studies of electron capture from He (and Ne) in collisions with slow He^q+ (and Ne^q+) projectiles using a ’Reaction Microscope’. We succeeded in collecting fully differential data sets for several reaction channels like single and double electron capture, resonant capture and capture accompanied with subsequent auto-ionization. The results are compared with theoretical model calculations. In order to achieve an efficient detection of emitted recoil-ions and electrons we implemented large area position sensitive MCP detectors with central holes for the passage of the projectile beam. This enabled us to measure the recoiling target ion in coincidence with Auger-electrons emitted from the highly excited projectile ion after capture. The experimental setup and first results of ongoing measurements will be presented.