Trace radioactive impurities in final construction materials for EXO-200

Abstract

We report results from a systematic measurement campaign conducted to identify low radioactivity materials for the construction of the EXO-200 double beta decay experiment. Partial results from this campaign have already been reported in a 2008 paper by the EXO collaboration. Here we release the remaining data, collected since 2007, to the public. The data reported were obtained using a variety of analytic techniques. The measurement sensitivities are among the best in the field. Construction of the EXO-200 detector has been concluded, and Phase-I data was taken from 2011 to 2014. The detector's extremely low background implicitly verifies the measurements and the analysis assumptions made during construction and reported in this paper.

arXiv comment28 pages, 5 figures

References in corpus (12)

• Search for Majorana neutrinos with the first two years of EXO-200 data
• Search for Neutrinoless Double-Beta Decay in ${}^{136}$Xe with EXO-200
• Detection of very small neutrino masses in double-beta decay using laser tagging
• Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200
• An improved measurement of the 2νββ half-life of Xe-136 with EXO-200
• Measurements of extremely low radioactivity levels in BOREXINO
• Systematic study of trace radioactive impurities in candidate construction materials for EXO-200
• The Majorana Demonstrator Radioassay Program
• Material screening and selection for XENON100
• Background studies for the EDELWEISS dark matter experiment
• Investigation of radioactivity-induced backgrounds in EXO-200
• Material Screening with HPGe Counting Station for PandaX Experiment

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• Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay
• The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs
• A Review of Basic Energy Reconstruction Techniques in Liquid Xenon and Argon Detectors for Dark Matter and Neutrino Physics Using NEST
• Trapped electrons and ions as particle detectors
• Background assessment for the TREX Dark Matter experiment
• Kiloton-scale xenon detectors for neutrinoless double beta decay and other new physics searches
• Radiopurity assessment of the energy readout for the NEXT double beta decay experiment
• The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Ultra-low radioactivity Kapton and copper-Kapton laminates
• Search for nucleon decays with EXO-200
• Cosmogenic activation in double beta decay experiments
• Development of an alpha-particle imaging detector based on a low radioactivity micro-time-projection chamber
• Double Beta Decay Experiments at Canfranc Underground Laboratory
• ${}^{210}$Pb measurements at the André E. Lalonde AMS Laboratory for the radioassay of materials used in rare event search detectors
• Mass spectrometric analyses of high performance polymers to assess radiopurity as ultra low background materials for rare event physics detectors
• Initial performance of the high sensitivity alpha particle detector at the Yangyang underground laboratory
• AlphaCAMM, a Micromegas-based camera for high-sensitivity screening of alpha surface contamination
• Sensitivity analysis towards trace-uranium detection with $\gamma$-$\gamma$ coincidence NAA
• An integrated online radioassay data storage and analytics tool for nEXO
• A pulsed, compact, low-background X-ray generator
• Study on cosmogenic activation in copper for rare event search experiments
• NaI(Tl) crystal scintillator encapsulated in two organic-scintillator layers with pulse shape data analysis