Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 53: Scintillator Detectors II
T 53.9: Vortrag
Mittwoch, 18. März 2026, 18:15–18:30, KH 01.014
Probing hybrid scintillators for NuDoubt++ — •Dorina Zundel for the NuDoubt collaboration — Johannes Gutenberg Universität Mainz
Neutrinoless double beta-plus decays (0νβ+β+, 0νβ+EC, 0νECEC) have yet to be observed, posing a significant experimental challenge in the search for rare lepton-number-violating processes. The NuDoubt++ project (Neutrino Double Beta Plus Plus) addresses this challenge by developing novel detection techniques that combine hybrid slow opaque scintillators with advanced light readout systems. The first prototype will employ enriched Krypton-78 gas at high pressure within an opaque scintillator vessel, enabling containment and detection of positrons and their annihilation photons. This configuration allows detailed reconstruction of event topology and particle identification, enhancing sensitivity to rare decay modes.
The characterization of slow scintillators is performed using the SCHLYP (Scintillation CHerenkov Light Yield Prism) laboratory setup. A hollow prism filled with scintillator samples is instrumented with three ultra-fast photomultipliers. A nearby 137Cs source generates signals via Compton scattering, and a secondary detector selects recoil photons aligned with the prism geometry. Two PMTs detect Cherenkov and scintillation light, while the third detects only scintillation, allowing measurement of the relative contribution of Cherenkov and scintillation components. The talk will present improvements to the setup including a Cherenkov radiator, enabling precise determination of scintillator decay timing characteristics.
Keywords: Hybrid opaque scintillators; Light yield prism; Double beta decay