$^{222}$Rn emanation measurements for the XENON1T experiment
Abstract
The selection of low-radioactive construction materials is of utmost importance for the success of low-energy rare event search experiments. Besides radioactive contaminants in the bulk, the emanation of radioactive radon atoms from material surfaces attains increasing relevance in the effort to further reduce the background of such experiments. In this work, we present the Rn emanation measurements performed for the XENON1T dark matter experiment. Together with the bulk impurity screening campaign, the results enabled us to select the radio-purest construction materials, targeting a Rn activity concentration of 10 Bq/kg in 3.2 t of xenon. The knowledge of the distribution of the Rn sources allowed us to selectively eliminate critical components in the course of the experiment. The predictions from the emanation measurements were compared to data of the Rn activity concentration in XENON1T. The final Rn activity concentration of (4.5 0.1) Bq/kg in the target of XENON1T is the lowest ever achieved in a xenon dark matter experiment.
Keywords
Cite
@article{arxiv.2009.13981,
title = {$^{222}$Rn emanation measurements for the XENON1T experiment},
author = {E. Aprile and J. Aalbers and F. Agostini and M. Alfonsi and L. Althueser and F. D. Amaro and V. C. Antochi and E. Angelino and J. R. Angevaare and F. Arneodo and D. Barge and L. Baudis and B. Bauermeister and L. Bellagamba and M. L. Benabderrahmane and T. Berger and P. A. Breur and A. Brown and E. 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 D. Coderre and A. P. Colijn and J. Conrad and J. P. Cussonneau and M. P. Decowski and A. Depoian and P. Di Gangi and A. Di Giovanni and R. Di Stefano and S. Diglio and A. Elykov and G. Eurin and A. D. Ferella and W. Fulgione and P. Gaemers and R. Gaior and A. Gallo Rosso and M. Galloway and F. Gao and L. Grandi and M. Garbini and C. Hasterok and C. Hils and K. Hiraide and L. Hoetzsch and E. Hogenbirk and J. Howlett and M. Iacovacci and Y. Itow and F. Joerg and N. Kato and S. Kazama and M. Kobayashi and G. Koltman and A. Kopec and H. Landsman and R. F. Lang and L. Levinson and Q. Lin and S. Lindemann and M. Lindner and F. Lombardi and J. A. M. Lopes and E. López Fune and C. Macolino and J. Mahlstedt and L. Manenti and A. Manfredini and F. Marignetti and T. Marrodán Undagoitia and K. Martens and J. Masbou and D. Masson and S. Mastroianni and M. Messina and K. Miuchi and A. Molinario and K. Morå and S. Moriyama and Y. Mosbacher and M. Murra and J. Naganoma and K. Ni and U. Oberlack and K. Odgers and J. Palacio and B. Pelssers and R. Peres and J. Pienaar and V. Pizzella and G. Plante and J. Qin and H. Qiu and D. Ramírez García and S. Reichard and A. Rocchetti and N. Rupp and J. M. F. dos Santos and G. Sartorelli and N. Šarčević and M. Scheibelhut and S. Schindler and J. Schreiner and D. Schulte 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 C. Therreau and D. Thers and F. Toschi and G. Trinchero and C. Tunnell and M. Vargas and G. Volta and O. Wack and H. Wang and Y. Wei and C. Weinheimer and M. Weiss and D. Wenz and J. Westermann and C. Wittweg and J. Wulf and Z. Xu and M. Yamashita and J. Ye and G. Zavattini and Y. Zhang and T. Zhu and J. P. Zopounidis},
journal= {arXiv preprint arXiv:2009.13981},
year = {2022}
}
Comments
14 pages, 3 figures