Dortmund 2006 – wissenschaftliches Programm
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T: Teilchenphysik
T 409: Neutrinos III
T 409.6: Vortrag
Mittwoch, 29. März 2006, 17:35–17:50, HG2-HS7
A Monte Carlo based estimate on the background contributions of the detector support for the Phase II of the GERDA experiment — •Kevin Kröninger, Iris Abt, Michael Altmann, Allen Caldwell, Daniel Kollar, Xiang Liu, and Bela Majorovits — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, D-80805 München
The GERDA experiment aims at the observation of neutrinoless double beta decay using germanium detectors as source and detector. The experimental goals of the Phase II of the experiment require a background rate of better than 10−3 counts/kg/keV/y in the region of interest.
A detailed GEANT4 based Monte Carlo study was performed in order to simulate possible background contributions from the suspension system including cabling surrounding the crystals. The background contribution of each part originating from the radioactive decay chains of Thorium and Uranium is evaluated. Limits for the permissable radioimpurities are given. The impact on the design of the system is discussed.