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.

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Keywords Alpha counting, Double beta decay, EXO, EXO-200, Germanium counting, Low background, Mass spectrometry, Mass spectroscopy, Neutron activation analysis, Radiopurity, Ultra-trace analysis
Persistent URL dx.doi.org/10.1016/j.nima.2017.04.049
Journal Nuclear Inst. and Methods in Physics Research, A
Leonard, D.S., Auty, D.J., Didberidze, T., Gornea, R.S, Grinberg, P., MacLellan, R., … Ziegler, T. (2017). Trace radioactive impurities in final construction materials for EXO-200. Nuclear Inst. and Methods in Physics Research, A. doi:10.1016/j.nima.2017.04.049