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Hamburg 2009 – scientific programme

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A: Fachverband Atomphysik

A 4: Electron Scattering and Recombination

A 4.3: Fachvortrag

Monday, March 2, 2009, 15:00–15:30, VMP 6 HS-E

Trielectronic Recombination with K-Shell Excitation — •Christian Beilmann, Octavian Postavaru, Rainer Ginzel, Christoph H. Keitel, Volkhard Mäckel, Paul H. Mokler, Martin C. Simon, Hiro Tawara, Joachim Ullrich, José R. Crespo López-Urrutia, and Zoltán Harman — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

We report the first observation of trielectronic recombination with excitation of a K-shell electron, involving three active electrons. It was identified in the x-ray emission spectrum of recombining highly charged Kr ions, together with indications of quadruelectronic recombination linking four active electrons. A resolution three times higher than any reported for this collision energy range around 10 keV resulted in the separation of their features from the stronger dielectronic resonances. For Kr30+, contributions of nearly 6% to the total resonant photorecombination rate were found.

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