Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 41: Poster: Electron scattering and recombination

A 41.6: Poster

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

The spin-orbit interaction in bremsstrahlung and its application for electron beam polarimetry — •Stanislav Tashenov1, Torbjörn Bäck2, Bo Cederwall2, Anton Khaplanov2, Kai-Uwe Schässburger2, Roman Barday3, Joachim Enders3, Yulia Fritzsche3, Andrey Surzhykov1,4, Vladimir Yerokhin1,4,5, and Doris Jakubassa-Amundsen61Physics Institute, Heidelberg University, Heidelberg, Germany — 2Royal Institute of Technology, Stockholm, Sweden — 3Institut für Kernphysik, Technische Universität Darmstadt, Germany — 4GSI Helmholtzzentrum, Darmstadt, Germany — 5Center for Advanced Studies, St. Petersburg State Polytechnical University, St. Petersburg, Russia — 6Mathematics Institute, University of Munich, Munich, Germany

Linear polarization of hard x-rays emitted in the process of the atomic field electron bremsstrahlung was measured with a polarized electron beam. The correlation between the initial orientation of the electron spin and the angle of photon polarization has been systematically studied by means of Compton and Rayleigh polarimetry techniques applied to a segmented germanium detector. The results are in a good agreement with the fully-relativistic calculations based on Dirac theory. They are also explained classically and in a unique way manifest that due to the spin-orbit interaction the electron scattering trajectory is not confined to a single scattering plane. Bremsstrahlung polarization correlations lead to a new method of polarimetry of electron beams which is sensitive to all three components of the electron spin.

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