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T: Fachverband Teilchenphysik

T 9: Neutrinophysik IX

T 9.1: Vortrag

Montag, 19. März 2018, 16:00–16:15, Z6 - HS 0.002

First Measurements of Lifetime and Formation Probablility of Orthopositronium in the Linear Alkylbenzene Based Scintillator of JUNO — •Mario Schwarz, Sabrina Franke, Marc Tippmann, Hans Steiger, Lothar Oberauer, Philipp Landgraf, Konstantin Schweizer, and Julia Sawatzki — Technische Universität München, Physik Department, Lehrstuhl für experimentelle Astroteilchenphysik, James-Franck-Str. 1, 85748 Garching bei München

The planned JUNO (Jinangmen Underground Neutrino Observatory) detector will use 20 kt of liquid scintillator (LS) based on LAB (Linear AlkylBenzene) as neutrino target. Reactor antineutrino interactions will be detected by means of inverse beta decay with the emission of a positron and analysis of the resulting luminescent light. An experimental setup for a lifetime determination of orthopositronium formed by positrons in the LS has been developed in Munich. In this talk an overview of the setup is presented as well as data obtained by detailed Monte-Carlo simulations and final measurement 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.