Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 32: Neutrinophysik X

T 32.5: Vortrag

Dienstag, 20. März 2018, 17:35–17:50, Z6 - HS 0.002

Determination of the Nonlinearity Parameter for LAB Based Liquid Scintillators for JUNO — •Konstantin Schweizer, Lothar Oberauer, and Julia Sawatzki — Technische Universität München

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. There was an experiment conducted to measure the nonlinearity of the light yield of low energy electron events with a low threshold of 5 keV. A photomultiplier tube (PMT) was 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, was used to determine the deposited energy in the scintillator by measuring the remaining energy of the Compton scattered gamma ray. The talk will present the current status of the experiment. This work is supported by the DFG Cluster of Excellence "Origin and Structure of the Universe", the DFG research unit "JUNO" and the SFB1258.