Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 48: Neutrino Physics without Accelerators 3
T 48.9: Vortrag
Dienstag, 22. März 2022, 18:15–18:30, T-H33
Fluorescence Time Profiles of the JUNO and TAO Liquid Scintillators using a Pulsed Neutron Beam in the Energy Range from 3.5 to 5.5 MeV — •Matthias Raphael Stock1, Hans Th. J. Steiger1,2, David Dörflinger1, Stefan Schoppmann3, Ulrike Fahrendholz1, Lothar Oberauer1, Luca Schweizer1, Korbinian Stangler1, and Dorina Zundel2 — 1Physik-Department, TU München, James-Franck-Str. 1, 85748 Garching — 2JGU Mainz, Cluster of Excellence PRISMA+, Staudingerweg 9, 55128 Mainz — 3University of California, Department of Physics, Berkeley, CA 94720-7300, USA
We simultaneously performed two liquid scintillator (LS) characterization experiments using a pulsed neutron beam at the CN accelerator of INFN Laboratori Nazionali di Legnaro. At energies ranging from 3.5 MeV to 5.5 MeV, one experiment measures the quenching factor of recoil protons while the one other measures the scintillation time profile of recoil protons. This talk is about the time profile experiment, where we show results of LS mixtures for the upcoming neutrino experiments JUNO and TAO in China as well as for future projects e.g., Theia, which will use a water-based LS. Differences in the time profiles after gamma and neutron excitation allows to perform pulse shape discrimination and therefore advances the ability to distinguish the neutrino signal from background. This work is supported by the BMBF Verbundforschung 05H2018 "R&D Detektoren (Szintillatoren)", the DFG research unit "JUNO", the DFG CRC 1258 "NDM" and the DFG Clusters of Excellence "PRISMA+" and "Origins".