Radiopurity requirements for the SuperNEMO experiment and the BiPo detector

Topical Research Meeting: Prospects in Neutrino Physics

Eurin, Guillaume^1,2

UCL, London

WC1E 6BT, United Kingdom^1

LAL, Univ Paris-Sud, CNRS/IN2P3, Orsay

F-91405, France^2

关键词: Contamination levels;    Fully operational;    Gamma spectroscopy;    Generation experiments;    Majorana particles;    Neutrinoless double-beta decays;    Sensitive detector;    Thin materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/598/1/012019/pdf
DOI  :  10.1088/1742-6596/598/1/012019

来源: IOP

【 摘 要 】

The main goal of the SuperNEMO collaboration is to try to observe neutrinoless double-β decay. This would prove that the neutrino is a Majorana particle (ν = ν). Today the best lower limits on half-lives of this process are set around 1024- 1026years as obtained by the NEMO-3 experiment [1] (for the 2β isotope100Mo) and other experiments. SuperNEMO is the next generation experiment based on the NEMO-3 tracker-calorimeter detection principle. The targeted contamination levels for the source foils are lower than can be measured through γ spectroscopy. A more sensitive detector has been constructed to measure low contaminations in208Tl (around few μBq/kg) and214Bi (few dozen μBq/kg) in thin materials: the BiPo detector. BiPo-3 has been fully operational at the Laboratorio Subterráneo de Canfranc (LSC) since January, 2013. The construction, performance and calibration of the BiPo-3 detector will be covered as well as the radiopurity requirements for SuperNEMO.