Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 57: Neutrinophysik 5 (Reaktorneutrinos)

T 57.6: Talk

Tuesday, March 28, 2017, 18:05–18:20, VSH 07

Determination of the kB parameter of LAB based scintillators for the JUNO experiment — •Konstantin Schweizer, Lothar Oberauer, Sabrina Prummer, and Stefan Schönert — Technische Universität München, Physik Department, Lehrstuhl für experimentelle Astroteilchenphysik, James-Franck-Str. 1, 85748 Garching bei München

The planned JUNO experiment is a 20 kt liquid scintillator neutrino detector based on a three component scintillator technology. Its primary goal is the determination of the neutrino mass hierarchy. This will be done by precision measurements of the reactor antineutrino survival probability. Due to the spherical detector’s diameter of 35 m and the required energy resolution of 3% at 1 MeV, the optical parameters of the scintillator have to be known very precisely and have to be very good. Therefore, the kB parameter which describes the quenching factor of the scintillator has to be determined in order to interpret the results of the neutrino mass hierarchy correctly. In order to measure the kB parameter a coincidence experiment between a photomultiplier tube measuring the scintillation light and a high-purity germanium detector has been set up. This talk will give the status of this setup and its results. This work is supported by the DFG Cluster of Excellence "Origin and Structure of the Universe", the DFG research unit "JUNO" and the Maier-Leibniz-Laboratorium.