Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 7: Experimental Techniques
MO 7.1: Vortrag
Montag, 11. März 2019, 14:00–14:15, S HS 002 Biologie
Enabling efficient coincident measurements of electrons and photons in the wavelength regime of 120 nm to 300 nm by a drastically increased solid angle for the photon detection — •Christian Ozga1, Philipp Schmidt1, Andreas Nehls1, Gregor Hartmann1, Xaver Holzapfel1, Clemens Richter2,3, Johannes Viehmann1, Philip Wenzel1, Uwe Hergenhahn2,4, Arno Ehresmann1, André Knie1, and Andreas Hans1 — 1Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) University of Kassel Heinrich-Plett-Straße 40, 34132, Kassel, Germany — 2Leibniz Institute of Surface Modification Permoserstr. 15, 04318 Leipzig, Germany — 3Department pf Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 4Max Planck Institute for Plasma Physics Wendelsteinstr. 1, 17491 Greifswald, Germany
The coincident measurement of particles is a powerful tool for revealing and discriminating different de-excitation pathways. However, only few experiments detect photons due to the comparable small solid angle for their detection and therefore a low coincidence detection efficiency. We conceived a method for efficient coincident measurements of electrons and photons by a drastically increased solid angle for the photon detection. This set-up combined with a magnetic bottle time of flight spectrometer results in electron photon coincidence count rates appropriate for experiments at synchrotron radiation facilities, where beamtime is limited. Here we present measurements on atomic noble gases as prototypical samples to show the capabilities of the method.