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Trace radioactive impurities in final construction materials for EXO-200

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Title: Trace radioactive impurities in final construction materials for EXO-200

Author(s): D.S. Leonard; D.J. Auty; T. Didberidze; R. Gornea; P. Grinberg; R. MacLellan; B. Methven; A. Piepke; J.-L. Vuilleumier; J.B. Albert; G. Anton; I. Badhrees; P.S. Barbeau; R. Bayerlein; D. Beck; V. Belov; M. Breidenbach; T. Brunner; G.F. Cao; W.R. Cen; C. Chambers; B. Cleveland; M. Coon; A. Craycraft; W. Cree; T. Daniels; M. Danilov; S.J. Daugherty; J. Daughhetee; J. Davis; S. Delaquis; A. Der Mesrobian-Kabakian; R. DeVoe; J. Dilling; A. Dolgolenko; M.J. Dolinski; W. Fairbank Jr.; J. Farine; S. Feyzbakhsh; P. Fierlinger; D. Fudenberg; K. Graham; G. Gratta; C. Hall; S. Herrin; J. Hoessl; P. Hufschmidt; M. Hughes; A. Jamil; M.J. Jewell; A. Johnson; S. Johnston; A. Karelin; L.J. Kaufman; T. Koffas; S. Kravitz; R. Krücken; A. Kuchenkov; K.S. Kumar; Y. Lan; F. LePort; S. Li; C. Licciardi; Y.H. Lin; D. Mackay; M.G. Marino; T. Michel; B. Mong; D. Moore; K. Murray; R. Neilson; R. Nelson; O. Njoya; A. Odian; I. Ostrovskiy; A. Pocar; K. Pushkin; F. Retière; P.C. Rowson; J.J. Russell; A. Schubert; D. Sinclair; E. Smith; V. Stekhanov; M. Tarka; T. Tolba; R. Tsang; M. Wagenpfeil; A. Waite; J. Walton; T. Walton; K. Wamba; M. Weber; L.J. Wen; U. Wichoski; J. Wodin; L. Yang; Y.-R. Yen; O.Ya. Zeldovich; J. Zettlemoyer; T. Ziegler

Subject: Radiopurity, ; Ultra-trace analysis, ; Neutron activation analysis, ; Mass spectrometry, ; Mass spectroscopy, ; Germanium counting, ; Alpha counting, ; Low background, ; Double beta decay, ; EXO, ; EXO-200

Journal: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.871, pp.169 - 179

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. (C) 2017 Elsevier B.V. All rights reserved