Material radiopurity control in the XENONnT experiment
Abstract
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 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 (17%) with respect to its predecessor XENON1T. Through radon emanation measurements, the expected Rn activity concentration in XENONnT is determined to be 4.2Bq/kg, a factor three lower with respect to XENON1T. This radon concentration will be further suppressed by means of the novel radon distillation system.
Cite
@article{arxiv.2112.05629,
title = {Material radiopurity control in the XENONnT experiment},
author = {E. Aprile and K. Abe and F. Agostini and S. Ahmed Maouloud and M. Alfonsi and L. Althueser and E. Angelino and J. R. Angevaare and V. C. Antochi and D. Antón Martin and F. Arneodo and L. Baudis and A. L. Baxter and L. Bellagamba and R. Biondi and A. Bismark and A. Brown and S. Bruenner and G. Bruno and R. Budnik and C. Capelli and J. M. R. Cardoso and D. Cichon and B. Cimmino and M. Clark and A. P. Colijn and J. Conrad and J. J. Cuenca-García and J. P. Cussonneau and V. D'Andrea and M. P. Decowski and P. Di Gangi and S. Di Pede and A. Di Giovanni and R. Di Stefano and S. Diglio and A. Elykov and S. Farrell and A. D. Ferella and H. Fischer and W. Fulgione and P. Gaemers and R. Gaior and M. Galloway and F. Gao and R. Glade-Beucke and L. Grandi and J. Grigat and A. Higuera and C. Hils and K. Hiraide and L. Hoetzsch and J. Howlett and M. Iacovacci and Y. Itow and J. Jakob and F. Joerg and N. Kato and P. Kavrigin and S. Kazama and M. Kobayashi and G. Koltman and A. Kopec and H. Landsman and R. F. Lang and L. Levinson and I. Li and S. Liang and S. Lindemann and M. Lindner and K. Liu and F. Lombardi and J. Long and J. A. M. Lopes and Y. Ma and C. Macolino and J. Mahlstedt and A. Mancuso and L. Manenti and A. Manfredini and F. Marignetti and T. Marrodán Undagoitia and K. Martens and J. Masbou and D. Masson and E. Masson and S. Mastroianni and M. Messina and K. Miuchi and K. Mizukoshi and A. Molinario and S. Moriyama and K. Morå and Y. Mosbacher and M. Murra and K. Ni and U. Oberlack and J. Palacio and R. Peres and J. Pienaar and M. Pierre and V. Pizzella and G. Plante and J. Qi and J. Qin and D. Ramírez García and S. Reichard and A. Rocchetti and N. Rupp and L. Sanchez and J. M. F. dos Santos and G. Sartorelli and J. Schreiner and D. Schulte and H. Schulze Eißing and M. Schumann and L. Scotto Lavina and M. Selvi and F. Semeria and P. Shagin and E. Shockley and M. Silva and H. Simgen and A. Takeda and P. -L. Tan and A. Terliuk and C. Therreau and D. Thers and F. Toschi and G. Trinchero and C. Tunnell and F. Tönnies and K. Valerius and G. Volta and Y. Wei and C. Weinheimer and M. Weiss and D. Wenz and J. Westermann and C. Wittweg and T. Wolf and Z. Xu and M. Yamashita and L. Yang and J. Ye and L. Yuan and G. Zavattini and Y. Zhang and M. Zhong and T. Zhu and J. P. Zopounidis and M. Laubenstein and S. Nisi},
journal= {arXiv preprint arXiv:2112.05629},
year = {2023}
}