Study of Radon background in the SuperNEMO detector
X. Aguerre*, A. Lahaie, M. Granjon, F. Perrot, Y. Vereshchaka and  On behalf of the SuperNemo Collaboration
*: corresponding author
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Pre-published on: December 17, 2024
Published on: April 29, 2025
Abstract
The goal of the SuperNEMO experiment is to search for neutrinoless double-beta decay $0\nu\beta\beta$ process, the observation of which would prove that the neutrino is a Majorana particle. $^{222}$𝑅𝑛 is
a gaseous isotope which could emanate from the detector materials or diffuse from the air of the laboratory into the detector, and its daughter isotope $^{214}$𝐵𝑖 with 𝑄$_𝛽$ = 3.27$\,$𝑀𝑒𝑉 can contribute to
the background. The $^{222}$𝑅𝑛 activity inside the SuperNEMO tracker demonstrator module must be significantly reduced down to 0.15$\,$𝑚𝐵𝑞.𝑚$^{-3}$. This paper will present anti-radon strategies used
in SuperNEMO and present a status of the $^{222}$𝑅𝑛 analysis based on first data using the topology of the $^{214}$𝐵𝑖 - $^{214}$𝑃𝑜 decay event, i.e. one electron followed by a delayed alpha with preliminary
results.
DOI: https://doi.org/10.22323/1.476.0199
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