Hannover 2013 – scientific programme
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A: Fachverband Atomphysik
A 41: Poster: Electron scattering and recombination
A 41.8: Poster
Thursday, March 21, 2013, 16:00–18:30, Empore Lichthof
Measurement of the angular distribution of Dielectronic Recombination into highly charged Krypton ions — •Pedro Amaro1, Christian Beilmann1, 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.