Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 48: Neutrino Physics without Accelerators 3
T 48.10: Vortrag
Dienstag, 22. März 2022, 18:30–18:45, T-H33
Quenching Factor Studies for Organic Liquid Scintillators with a Pulsed Neutron Beam — •Hans Th. J. Steiger1,2, M. Raphael Stock2, David Dörflinger2, Stefan Schoppmann3, Manuel Böhles1, Ulrike Fahrendholz2, Lothar Oberauer2, Luca Schweizer2, Korbinian Stangler2, and Dorina Zundel1 — 1JGU Mainz, Cluster of Excellence PRISMA+, Staudingerweg 9, 55128 Mainz, Germany — 2Physik-Department, TU München, James-Franck-Str. 1, 85748 Garching, Germany — 3UC Berkeley, Department of Physics, CA 94720-7300, USA
Leading current multi-ton-scale neutrino experiments rely on the successful application of liquid scintillators (LS). Therefore, detailed understanding of the detectors and their detection media are crucial to construct realistic simulations and predictions of phenomena. With our measurements at the CN accelerator of the INFN Laboratori Nazionali di Legnaro, we conduct precision characterizations of LSs in terms of proton quenching and fluorescence spectra. In these experiments neutron interactions are distinguished from beam correlated gammas by time-of-flight measurements. During several beamtimes in the past two years we studied samples of scintillators from the experiments JUNO, TAO, Borexino, Theia and SNO+. Precise data about the quenching factors of proton and 12C-recoils for all measured liquid scintillators were gained for the first time. This work is supported by the Cluster of Excellence PRISMA+, the Bundesministerium für Bildung und Forschung (Verbundprojekt 05H2018: R&D Detectors and Scintillators) and the DFG Research Unit JUNO.