Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 110: Niederenergie-Neutrinophysik/Suche nach Dunkler Materie 5

T 110.3: Talk

Wednesday, February 29, 2012, 17:20–17:35, ZHG 102

Alpha-Beta Discrimination in LENA — •Randolph Möllenberg — for the LENA working group - Technische Universität München, Physik Department E15, James Franck Straße 1, 85748 Garching

Alpha emitting isotopes, mainly ²¹⁰Po, provide a background for the detection of ⁷Be neutrinos in LENA (Low Energy Neutrino Astronomy). This background can be reduced by a pulse shape analysis, as alpha particles and electrons have a different typical pulse shape, caused by the different energy deposition per unit path length (dE/dx). Thus, the efficiency of this method was analyzed by a detailed Monte Carlo study. Several scintillators as well as the influence of the photomultiplier performance on the discrimination efficiency were investigated.

This work was supported by the Maier-Leibniz-Laboratorium and the cluster of excellence ’Origin and Structure of the Universe’.