SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 75: Calorimeter / Detector Systems III

T 75.1: Talk

Wednesday, March 22, 2023, 15:50–16:05, WIL/C133

Neutron and Photon Tagging in Plastic Scintillators — Asma Hadef, Antoine Laudrain, •Asa Nehm, and Sebastian Ritter — JGU Mainz, ETAP

While neutron-photon separation using pulse shape discrimination with liquid scintillators and PMTs is a well-known technique, it represents a major challenge using plastic scintillators with SiPM readout. A setup using an AmBe source has been built in order to study the ability of the EJ-276G plastic scintillator optimized for pulse shape discrimination to distinguish between neutrons and photons. The design also includes a cosmic tagging which allows for the identification and rejection of the cosmic background.

The main approach for the discrimination method is to use the more frequent delayed scintillation photons for neutrons compared to the gammas for the events. Different analysis methods using the amount of delayed photon-electron peaks per event as well as their timing information are implemented and studied in detail.

This method could be used in the electromagnetic calorimeter that is part of the DUNE near detector complex, to provide neutron tagging capabilities and enable neutron energy reconstruction.