Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 60: Niederenergie-Neutrinophysik I

T 60.8: Vortrag

Dienstag, 1. März 2016, 18:40–18:55, VMP9 SR 07

Non linearities in the light yield of liquid scintillators — •Tobias Drohmann, Lothar Oberauer, Corbinian Oppenheimer, Sabrina Prummer, Julia Sawatzki, Stefan Schönert, and Vincenz Zimmer — Physik-Department and Excellence Cluster Universe, Technische Universität München, D-85747 Garching

The organic liquid scintillator based JUNO experiment (Jiangmen Underground Neutrino Observatory) has the aim to determine the neutrino mass hierarchy. To achieve this goal an unprecedented energy resolution of 3% at 1 MeV is crucial. Therefore the energy dependent light yield for electrons depositing energy in the scintillator has to be known precisely.

Currently there is an experiment in preparation at the Technical University Munich to measure the non linearity in the light yield of low energy electron events with a low threshold of ∼10 keV. A photomultiplier tube (PMT) is used to detect the light produced by a Compton electron in a liquid scintillator sample. A High Purity Germanium Detector, operated in coincidence with the PMT, is used to determine the deposited energy in the scintillator by measuring the remaining energy of the Compton scattered γ-ray. The talk will present the status of this experiment.

This research was supported by the DFG cluster of excellence ’Origin and structure of the Universe’, the Maier-Leibnitz-Laboratorium (MLL) in Garching and the DFG JUNO-Forschergruppe.