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arXiv · 2407.05999

Combining Hybrid and Opaque Scintillator Techniques in the Search for Double Beta Plus Decays

NuDoubt++ Collaboration·:·Manuel Böhles·Sebastian Böser·Magdalena Eisenhuth·Cloé Girard-Carillo·Kitzia M. Hernandez Curiel·Bastian Keßler·Kyra Mossel·Veronika Palušová·Stefan Schoppmann·Alfons Weber·Michael Wurm
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Abstract

Double beta plus decay is a rare nuclear disintegration process. Difficulties in its measurement arise from suppressed decay probabilities, experimentally challenging decay signatures and low natural abundances of suitable candidate nuclei. In this article, we propose a new detector concept to overcome these challenges. It is based on the first-time combination of hybrid and opaque scintillation detector technology paired with novel light read-out techniques. This approach is particularly suitable detecting positron (beta plus) signatures. We expect to discover two-neutrino double beta plus decay modes within 1 tonne-week exposure and are able to probe neutrinoless double beta plus decays at several orders of magnitude improved significance compared to current experimental limits.

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NuDoubt++ Collaboration, :, Manuel Böhles, Sebastian Böser, Magdalena Eisenhuth, Cloé Girard-Carillo, Kitzia M. Hernandez Curiel, Bastian Keßler, Kyra Mossel, Veronika Palušová, Stefan Schoppmann, Alfons Weber, Michael Wurm. 2024-07-08. Combining Hybrid and Opaque Scintillator Techniques in the Search for Double Beta Plus Decays. https://doi.org/10.1140/epjc%2Fs10052-025-13847-1

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