Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 37: Electron scattering and recombination
A 37.3: Vortrag
Donnerstag, 20. März 2014, 11:15–11:30, BEBEL E42
Polarization of bremsstrahlung photons in coincidence (e,e′,γ) studies — •Robert A. Müller1,2, Vladimir A. Yerokhin3, and Andrey Surzhykov1 — 1Helmholtz-Institut Jena — 2Universität Jena — 3St. Petersburg State Polytechnical University
In atomic bremsstrahlung the scattering of an electron by an atomic field is accompanied by the emission of a photon. The polarization of this photon has been studied in detail both in theory and experiment during the last years [1,2]. In most of these studies, however, the scattered electron remained unobserved. Owing to recent experimental advances, a new generation of studies becomes feasible in which the photon polarization is detected in coincidence with the electron scattering angle. First steps towards these coincidence experiments have been done for low- and medium-Z targets [3]. Moreover experiments are planned for the high-Z domain. Therefore we present in this contribution the theoretical study of the polarization of bremsstrahlung photons observed together with the scattered electrons. We applied the density matrix approach and pertubation theory to perform calculations for electrons with an energy of 100keV up to 500keV scattered by gold targets. The electron scattering angle shows a strong influence on the polarization properties of the photon, especially in comparison to the case when the scattered electron is not observed.
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