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A: Fachverband Atomphysik

A 41: Poster: Electron scattering and recombination

A 41.8: Poster

Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof

Measurement of the angular distribution of Dielectronic Recombination into highly charged Krypton ions — •Pedro Amaro¹, Christian Beilmann^{1, 2}, René Steinbrügge², Chintan Shah¹, Jan K. Rudolph², Sven Bernitt², Oleksiy Kovtun¹, José R. Crespo López-Urrutia², and Stanislav Tashenov¹ — ¹Ruprecht-Karls-Universität Heidelberg, Germany — ²Max-Planck-Institut für Kernphysik, Heidelberg, Germany

We report studies of the angular distribution of X-rays produced by dielectronic recombination (DR) of highly charged ions. Krypton ions in He-like through N-like charge states were generated in an electron beam ion trap, and the electron-ion collision energy scanned over a range of DR resonances exciting K-shell electrons. The subsequent photon emission was recorded both along and perpendicular to the electron beam axis. The asymmetries observed indicate an alignment of the total angular momentum vector of the intermediate excited state with respect to the electron beam propagation axis. This alignment probes the dynamics of the DR process due to the electron-electron interaction in the strong electromagnetic field of the target ion.