Material radioassay and selection for the XENON1T dark matter experiment E. Aprile, J. Aalbers, F. Agostini, M. Alfonsi, F. D. Amaro, M. Anthony, F. Arneodo, P. Barrow, L. Baudis, B. Bauermeister et al. (111 more) Eur. Phys. J. C, 77 12 (2017) 890 Published online: 19 December 2017 DOI: 10.1140/epjc/s10052-017-5329-0