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T: Fachverband Teilchenphysik

T 100: Niederenergie-Neutrinophysik 2

T 100.8: Vortrag

Montag, 4. März 2013, 18:40–18:55, WIL-A317

Proton energy quenching and pulse shape discrimination in organic liquid scintillator for LENA — •Ludwig Prade, Simon Appel, German Beischler, Jill Kaindl, Timo Lewke, Quirin Meindl, Randolph Möllenberg, Lothar Oberauer, Patrick Pfahler, Tobias Stempfle, Marc Tippmann, Jürgen Winter, and Vincenz Zimmer — for the LAGUNA-LENA working group — Technische Universität München, Physik Department E15, James Franck Straße, 85748 Garching

LENA is a proposed 50kt neutrino observatory based on liquid scintillator. Due to its low energy threshold, liquid scintillator allows measurements in the MeV range and below.

The Maier-Leibnitz-Laboratorium in Garching provides excellent conditions for studying energy dependent quenching of protons and particle discrimination via pulse-shape analysis in liquid scintillator. The tandem-accelerator provides a source of mono-energetic neutrons to which a scintillator sample is exposed.

To provide a good energy scale careful calibration with gamma-sources of the setup is required. For this, Monte-Carlo simulations have been performed to understand the physical processes inside the detector. The simulated data has then been compared to the real measurements and a good agreement has been found. Further understanding of the calibration is achieved by using a secondary HPGe-detector which measured the gammas backscattered within the scintillator.

This work has been supported by the Maier-Leibnitz-Laboratorium and the cluster of excellence ’Origin and Structure of the Universe’.