Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 106: Niederenergie-Neutrinophysik/Suche nach dunkler Materie III
T 106.5: Vortrag
Mittwoch, 30. März 2011, 17:50–18:05, 30.95: 121
The scintillation of liquid argon - ion beam excitation — •Martin Hofmann1, Thomas Dandl1, Thomas Heindl1, Reiner Krücken1, Lothar Oberauer1, Walter Potzel1, Andreas Ulrich1, and Jochen Wieser2 — 1Technische Universität München — 2OPTIMARE Analytik GmbH & Co. KG Wilhelmshaven
The direct search for non-baryonic Dark Matter can be performed using liquid rare-gas based scintillation detectors. As the expected signal rates are very low, a very good discrimination between WIMPs and background events is needed. The WIMPs mainly scatter off nuclei, while background events lead mostly to electron recoils. Therefore, it is mandatory to investigate the scintillation properties of liquified rare gases when excited with electrons and heavy ions. In this context, experiments have been performed at the Munich Tandem Accelerator to study the spectral and temporal emission properties of argon in a wavelength region of 110 to 800 nm when excited with protons, as well as with sulfur and gold nuclei. An adapted setup has been developed and installed at the Tandem Accelerator Laboratory in Garching.
This work has been supported by funds of the DFG (Transregio 27: Neutrinos and beyond), the Excellence Cluster Universe and the Maier-Leibnitz-Laboratorium Garching.