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arXiv · 1903.10736

Scintillation Balloon for Neutrinoless Double-Beta Decay Search with Liquid Scintillator Detectors

S. Obara·Y. Gando·K. Ishidoshiro
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Abstract

Environmental radioactivity is a dominant background for rare decay search experiments, and it is difficult to completely remove such an impurity from detector vessels. We propose a scintillation balloon as the active vessel of a liquid scintillator in order to identify this undesirable radioactivity. According to our feasibility studies, the scintillation balloon enables the bismuth--polonium sequential decay to be tagged with a 99.7\% efficiency, assuming a KamLAND (Kamioka Liquid scintillator AntiNeutrino Detector)-type liquid scintillator detector. This tagging of sequential decay using alpha-ray from the polonium improves the sensitivity to neutrinoless double-beta decay with rejecting beta-ray background from the bismuth.

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S. Obara, Y. Gando, K. Ishidoshiro. 2019-03-26. Scintillation Balloon for Neutrinoless Double-Beta Decay Search with Liquid Scintillator Detectors. https://doi.org/10.1093/ptep%2Fptz064

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