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T: Fachverband Teilchenphysik

T 101: Neutrino physics without accelerators VII

T 101.7: Vortrag

Freitag, 3. April 2020, 12:30–12:45, H-ÜR 1

Fluorescence Decay-Time Spectroscopy of the JUNO Liquid Scintillator using Gamma Radiation and a Pulsed Neutron Beam — •Matthias Raphael Stock, Hans Theodor Josef Steiger, Lothar Oberauer, Andreas Steiger, Ulrike Fahrendholz, Katharina Bock, and Oliver Dötterl — Technische Universität München, Physik-Department, James-Franck-Straße 1, 85748 Garching bei München

Major science goals of the upcoming Jiangmen Underground Neutrino Observatory (JUNO) in China are the search for the proton decay and the detection of the diffuse supernova neutrino background. Both phenomena will show characteristic signals in the detector. Therefore, we evaluate the pulse shape discrimination performance of liquid scintillators (LSs) using excitation by gamma radiation inducing recoil electrons as well as a pulsed neutron beam inducing recoil protons. We developed an experimental setup to characterize the distribution of light emission in the fluorescence process for different LS mixtures for future neutrino experiments e.g. JUNO and THEIA. We present results such as the fluorescence decay-time constants of the JUNO LS, which we investigated during two beam times at the 14 MV Tandem Van de Graaff Accelerator of the Maier-Leibnitz-Laboratorium (MLL). This work is supported by the DFG Research Unit JUNO and by the Bundesministerium für Bildung und Forschung (BMBF) for THEIA (Verbundprojekt 05H2018: R&D Detectors and Scintillators).