Material radiopurity control in the XENONnT experiment
- Aprile, E.
- Abe, K.
- Agostini, F.
- Maouloud, S. Ahmed
- Alfonsi, M.
- Althueser, L.
- Angelino, E.
- Angevaare, J. R.
- Antochi, V. C.
- Martin, D. Antón
- Arneodo, F.
- Baudis, L.
- Baxter, A. L.
- Bellagamba, L.
- Biondi, R.
- Bismark, A.
- Brown, A.
- Bruenner, S.
- Bruno, G.
- Budnik, R.
- Capelli, C.
- Cardoso, J. M. R.
- Cichon, D.
- Cimmino, B.
- Clark, M.
- Colijn, A. P.
- Conrad, J.
- Cuenca-García, J. J.
- Cussonneau, J. P.
- D'Andrea, V.
- Decowski, M. P.
- Di Gangi, P.
- Di Pede, S.
- Di Giovanni, A.
- Di Stefano, R.
- Diglio, S.
- Elykov, A.
- Farrell, S.
- Ferella, A. D.
- Fischer, H.
- Fulgione, W.
- Gaemers, P.
- Gaior, R.
- Galloway, M.
- Gao, F.
- Glade-Beucke, R.
- Grandi, L.
- Grigat, J.
- Higuera, A.
- Hils, C.
- Hiraide, K.
- Hoetzsch, L.
- Howlett, J.
- Iacovacci, M.
- Itow, Y.
- Jakob, J.
- Joerg, F.
- Kato, N.
- Kavrigin, P.
- Kazama, S.
- Kobayashi, M.
- Koltman, G.
- Kopec, A.
- Landsman, H.
- Lang, R. F.
- Levinson, L.
- Li, I.
- Liang, S.
- Lindemann, S.
- Lindner, M.
- Liu, K.
- Lombardi, F.
- Long, J.
- Lopes, J. A. M.
- Ma, Y.
- Macolino, C.
- Mahlstedt, J.
- Mancuso, A.
- Manenti, L.
- Manfredini, A.
- Marignetti, F.
- Undagoitia, T. Marrodán
- Martens, K.
- Masbou, J.
- Masson, D.
- Masson, E.
- Mastroianni, S.
- Messina, M.
- Miuchi, K.
- Mizukoshi, K.
- Molinario, A.
- Moriyama, S.
- Morå, K.
- Mosbacher, Y.
- Murra, M.
- Ni, K.
- Oberlack, U.
- Palacio, J.
- Peres, R.
- Pienaar, J.
- Pierre, M.
- Pizzella, V.
- Plante, G.
- Qi, J.
- Qin, J.
- García, D. Ramírez
- Reichard, S.
- Rocchetti, A.
- Rupp, N.
- Sanchez, L.
- Santos, J. M. F. dos
- Sartorelli, G.
- Schreiner, J.
- Schulte, D.
- Eißing, H. Schulze
- Schumann, M.
- Lavina, L. Scotto
- Selvi, M.
- Semeria, F.
- Shagin, P.
- Shockley, E.
- Silva, M.
- Simgen, H.
- Takeda, A.
- Tan, P. -L.
- Terliuk, A.
- Therreau, C.
- Thers, D.
- Toschi, F.
- Trinchero, G.
- Tunnell, C.
- Tönnies, F.
- Valerius, K.
- Volta, G.
- Wei, Y.
- Weinheimer, C.
- Weiss, M.
- Wenz, D.
- Westermann, J.
- Wittweg, C.
- Wolf, T.
- Xu, Z.
- Yamashita, M.
- Yang, L.
- Ye, J.
- Yuan, L.
- Zavattini, G.
- Zhang, Y.
- Zhong, M.
- Zhu, T.
- Zopounidis, J. P.
- Laubenstein, M.
- Nisi, S.
DOIAbstract
The selection of low-radioactive construction materials is of the utmost importance for rare-event searches and thus critical to the XENONnT experiment. Results of an extensive radioassay program are reported, in which material samples have been screened with gamma-ray spectroscopy, mass spectrometry, and $^{222}$Rn emanation measurements. Furthermore, the cleanliness procedures applied to remove or mitigate surface contamination of detector materials are described. Screening results, used as inputs for a XENONnT Monte Carlo simulation, predict a reduction of materials background ($\sim$17%) with respect to its predecessor XENON1T. Through radon emanation measurements, the expected $^{222}$Rn activity concentration in XENONnT is determined ...
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