A. Agrawal, V.V. Alenkov, P. Aryal, H. Bae, J. Beyer, B. Bhandari, R.S. Boiko, K. Boonin, O. Buzanov, C.R. Byeon, N. Chanthima, M.K. Cheoun, J.S. Choe, S. Choi, S. Choudhury, J.S. Chung, F.A. Danevich, M. Djamal, D. Drung, C. Enss, A. Fleischmann, A.M. Gangapshev, L. Gastaldo, Y.M. Gavrilyuk, A.M. Gezhaev, O. Gileva, V.D. Grigorieva, V.I. Gurentsov, C. Ha, D.H. Ha, E.J. Ha, D.H. Hwang, E.J. Jeon, J.A. Jeon, H.S. Jo, J. Kaewkhao, C.S. Kang, W.G. Kang, V.V. Kazalov, S. Kempf, A. Khan, S. Khan, D.Y. Kim, G.W. Kim, H.B. Kim, H.J. Kim, H.J. Kim, H.L. Kim, H.S. Kim, M.B. Kim, S.C. Kim, S.K. Kim, S.R. Kim, W.T. Kim, Y.D. Kim, Y.H. Kim, K. Kirdsiri, Y.J. Ko, V.V. Kobychev, V. Kornoukhov, V.V. Kuzminov, D.H. Kwon, C.H. Lee, D.Y. Lee, E.K. Lee, H.J. Lee, H.S. Lee, J. Lee, J.Y. Lee, K.B. Lee, M.H. Lee, M.K. Lee, S.W. Lee, Y.C. Lee, D.S. Leonard, H.S. Lim, B. Mailyan, E.P. Makarov, P. Nyanda, Y. Oh, S.L. Olsen, S.I. Panasenko, H.K. Park, H.S. Park, K.S. Park, S.Y. Park, O.G. Polischuk, H. Prihtiadi, S. Ra, S.S. Ratkevich, G. Rooh, M.B. Sari, J. Seo, K.M. Seo, B. Sharma, K.A. Shin, V.N. Shlegel, K. Siyeon, J. So, N.V. Sokur, J.K. Son, J.W. Song, N. Srisittipokakun, V.I. Tretyak, R. Wirawan, K.R. Woo, H.J. Yeon, Y.S. Yoon, Q. Yue
The AMoRE-II experiment will search for the 0νββ decay of 100Mo nuclei using molybdate crystal scintillators, operating at milli-Kelvin (mK) temperatures, with a total of 80 kg of 100Mo. The background goal for the experiment is 10–4 counts/keV/kg/year in the region of interest around the 0νββ decay Q-value of 3,034 keV. To achieve this level, the rate of background signals arising from emissions produced by decays of radioactive impurities in the detector and shielding materials must be strictly controlled. To do this, concentrations of such impurities are measured and are controlled through materials selection and purification. In this paper, we describe the design and the construction materials used to build the AMoRE-II detector and shielding system, including active and passive shielding, the cryostat, and the detector holders and instrumentation, and we report on measurements of radioactive impurities within candidate and selected materials. Copyright © 2024 AMoRE Collaboration.
Abdul Wali Khan University Mardan, Mardan, Pakistan; Ajou University, Suweon, Republic of Korea; Baksan Neutrino Observatory, Institute for Nuclear Research (RAS), Moscow, Russia; Bandung Institute of Technology, Bandung, Indonesia; Center for Underground Physics, Institute for Basic Science, Daejeon, Republic of Korea; Chung-Ang University, Seoul, Republic of Korea; Department of Physics and Astronomy, Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, Germany; Florida Institute of Technology, Melbourne, FL, United States; Fomos Material, Moscow, Russia; Indian Institute of Science (IISc), Bangalore, India; Institute for Nuclear Research (RAS), Moscow, Russia; Institute for Nuclear Research, National Academy of Sciences of Ukraine (NAS Ukraine), Kyiv, Ukraine; Kohat University of Science and Technology, Kohat, Pakistan; Korea Research Institute of Standards and Science, Daejeon, Republic of Korea; Korea University, Sejong, Republic of Korea; Kyungpook National University, Daegu, Republic of Korea; Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand; National Research Nuclear University MEPhI, Moscow, Russia; Nikolaev Institute of Inorganic Chemistry (RAS), Novosibirsk, Russia; Padang State University, Padang, Indonesia; Physical-Technical Federal Institute, Braunschweig, Germany; Sejong University, Seoul, Republic of Korea; Seoul National University, Seoul, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Shiv Nadar University, Greater Noida, India; Soongsil University, Seoul, Republic of Korea; State University of Malang, Malang, Indonesia; The University of Tokyo, Bunkyo, Japan; Tsinghua University, Beijing, China; University of Mataram, Mataram, Indonesia; University of Science and Technology, Daejeon, Republic of Korea; V. N. Karazin Kharkiv National University, Kharkiv, Ukraine.