Low background techniques for SuperNEMO

Topical Research Meeting: Prospects in Neutrino Physics

Liu, Xin Ran^1 ; Mott, James^1

Department of Physics and Astronomy, University College London, Gower Street, London

WC1E 6BT, United Kingdom^1

关键词: Gamma-ray spectroscopy;    Germanium detector;    Measurements of;    Orders of magnitude;    Radon concentrations;    Selection of materials;    State of the art;    Ultra low backgrounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/598/1/012022/pdf
DOI  :  10.1088/1742-6596/598/1/012022

来源: IOP

【 摘 要 】

The UK contribution to achieving the ultra-low background conditions required inside the detectors of the SuperNEMO experiment are described. A dedicated facility has been established for the screening and selection of materials through gamma ray spectroscopy using germanium detectors. Initial results from two detectors are shown. The radon level inside the SuperNEMO detector must be less than 150 μBq/m3in order to achieve the target sensitivity. A Radon Concentration Line (RnCL) has been developed capable of measuring radon levels in large gas volumes down to 5 μBq/m3, improving on standard state-of-the-art radon detectors by 3 orders of magnitude. The development, commissioning and first measurements of radon content using the RnCL are also presented.