A. Agrawal, V.V. Alenkov, P. Aryal, J. Beyer, B. Bhandari, R.S. Boiko, K. Boonin, O. Buzanov, C.R. Byeon, N. Chanthima, M.K. Cheoun, J.S. Choe, Seonho 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. Hwnag, 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, Ho-Jong 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, DongYeup 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, E. Sala, 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
AMoRE-II aims to search for neutrinoless double beta decay (0νββ) with an array of 423 Li2100MoO4 crystals operating in the cryogenic system as the main phase of the Advanced Molybdenum-based Rare process Experiment (AMoRE). AMoRE has been planned to operate in three phases: AMoRE-pilot, AMoRE-I, and AMoRE-II. AMoRE-II is currently being installed at the Yemi Underground Laboratory, located approximately 1000 m deep in Jeongseon, Korea. The goal of the experiment is to reach an exclusion half-life sensitivity to the 0νββ of 100Mo on the level of T1/20νββ>6×1026 year that covers completely the inverted Majorana neutrino mass hierarchy region of (15–46) meV. To achieve this, the background level of the experimental configurations and possible background sources of gamma and beta events should be well understood. We have intensively performed Monte Carlo simulations using the GEANT4 toolkit in all the experimental configurations with potential sources. We report the estimated background level that meets the 10-4 counts/(keV·kg·year) requirement for AMoRE-II in the Region Of Interest (ROI) and show the projected half-life sensitivity based on the simulation study. © The Author(s) 2024.
Indian Institute of Science, India; JSC FOMOS-Materials; Department of Physics, Kyungpook National University, South Korea; Physikalisch-Technische Bundesanstalt, Germany; University of Science and Technology (UST), South Korea; Institute for Nuclear Research of NASU, Ukraine; Nakhon Pathom Rajabhat University, Thailand; Department of Physics, Soongsil University, South Korea; Center for Underground Physics, Institute for Basic Science (IBS), South Korea; Department of Physics and Astronomy, Seoul National University, South Korea; Department of Physics, Chung-Ang University, South Korea; Department of Physics, Institut Teknologi, Indonesia; Kirchhoff-Institute for Physics, Germany; Neutrino Observatory of INR RAS, Russian Federation; Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Science, Russian Federation; Department of Physics, Kohat University of Science and Technology, Pakistan; Department of Physics and Astronomy, Sejong University, South Korea; National Research Nuclear University MEPhI, Russian Federation; Department of Accelerator Science, South Korea; Korea Research Institute of Standards and Science, South Korea; Florida Institute of Technology, United States; V.N. Karazin Kharkiv National University, Ukraine; Department of Physics, Abdul Wali Khan University, Pakistan; Department of Physics, University of Mataram, Indonesia; Tsinghua University, China; Institute of Micro- and Nanoelectronic Systems (IMS), Karlsruhe Institute of Technology (KIT), Germany; Department of Physics, Universitas Negeri Malang, Indonesia; INFN, Sezione di Roma, Italy; INFN, Laboratori Nazionali del Gran Sasso, Italy
