V. Alenkov, H.W. Bae, J. Beyer, R.S. Boiko, K. Boonin, O. Buzanov, N. Chanthima, M.K. Cheoun, S.H. Choi, F.A. Danevich, M. Djamal, D. Drung, C. Enss, A. Fleischmann, A. Gangapshev, L. Gastaldo, Yu. M. Gavriljuk, A. Gezhaev, V.D. Grigoryeva, V. Gurentsov, D.H. Ha, C. Ha, E.J. Ha, I. Hahn, E.J. Jeon, J. Jeon, H.S. Jo, J. Kaewkhao, C.S. Kang, S.J. Kang, W.G. Kang, S. Karki, V. Kazalov, A. Khan, S. Khan, D.-Y. Kim, G.W. Kim, H.B. Kim, H.J. Kim, H.L. Kim, H.S. Kim, I. Kim, W.T. Kim, S.R. Kim, S.C. Kim, S.K. Kim, Y.D. Kim, Y.H. Kim, K. Kirdsiri, Y.J. Ko, V.V. Kobychev, V. Kornoukhov, V. Kuz’minov, D.H. Kwon, C. 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.H. Lee, S.W. Lee, S.W. Lee, D.S. Leonard, J. Li, Y. Li, P. Limkitjaroenporn, B. Mailyan, E.P. Makarov, S.Y. Oh, Y.M. Oh, O. Gileva, S. Olsen, A. Pabitra, S. Panasenko, I. Pandey, C.W. Park, H.K. Park, H.S. Park, K.S. Park, S.Y. Park, O.G. Polischuk, H. Prihtiadi, S.J. Ra, S. Ratkevich, G. Rooh, M.B. Sari, J. Seo, K.M. Seo, J.W. Shin, K.A. Shin, V.N. Shlegel, K. Siyeon, N.V. Sokur, J.-K. Son, N. Srisittipokakun, N. Toibaev, V.I. Tretyak, R. Wirawan, K.R. Woo, Y.S. Yoon, Q. Yue
The Advanced Mo-based Rare process Experiment (AMoRE)-Pilot experiment is an initial phase of the AMoRE search for neutrinoless double beta decay of 100Mo, with the purpose of investigating the level and sources of backgrounds. Searches for neutrinoless double beta decay generally require ultimately low backgrounds. Surface α decays on the crystals themselves or nearby materials can deposit a continuum of energies that can be as high as the Q-value of the decay itself and may fall in the region of interest (ROI). To understand these background events, we studied backgrounds from radioactive contaminations internal to and on the surface of the crystals or nearby materials with Geant4-based Monte Carlo simulations. In this study, we report on the measured α energy spectra fitted with the corresponding simulated spectra for six crystal detectors, where sources of background contributions could be identified through high energy α peaks and continuum parts in the energy spectrum for both internal and surface contaminations. We determine the low-energy contributions from internal and surface α contaminations by extrapolating from the α background fitting model. © 2022, The Author(s).
JSC FOMOS-Materials, Moscow, 107023, Russian Federation; Department of Physics, Kyungpook National University, Daegu, 41566, South Korea; Physikalisch-Technische Bundesanstalt, Braunschweig, 38116, Germany; Institute for Nuclear Research of NASU, Kyiv, 03028, Ukraine; Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand; Department of Physics, Soongsil University, Seoul, 06978, South Korea; Department of Physics and Astronomy, Seoul National University, Seoul, 08826, South Korea; Department of Physics, Institut Teknologi Bandung, Bandung, 40132, Indonesia; Kirchhoff-Institute for Physics, Heidelberg, 69120, Germany; Baksan Neutrino Observatory of INR RAS, Kabardino-Balkaria, 361609, Russian Federation; Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Science, Novosibirsk, 630090, Russian Federation; Department of Physics, Chung-Ang University, Seoul, 06911, South Korea; Department of Physics and Research Institute for Natural Science, Hanyang University, Seoul, 04763, South Korea; Center for Underground Physics, Institute for Basic Science (IBS), Daejeon, 34126, South Korea; Semyung University, Jecheon, 27136, South Korea; Department of Physics, Kohat University of Science and Technology, Kohat, Khyber Pakhtunkhwa 26000, Pakistan; Department of Physics and Astronomy, Sejong University, Seoul, 05006, South Korea; University of Science and Technology (UST), Daejeon, 34113, South Korea; National Research Nuclear University MEPhI, Moscow, 115409, Russian Federation; Korea Research Institute of Standards and Science, Daejeon, 34113, South Korea; Tsinghua University, Beijing, 100084, China; V.N. Karazin Kharkiv National University, Kharkiv, 61022, Ukraine; Department of Accelerator Science, Korea University, Sejong, 30019, South Korea; Department of Physics, Abdul Wali Khan University, Mardan, 23200, Pakistan; University of Mataram, Mataram Nusa Tenggara Bar., 83121, Indonesia; Department of Physics, Universitas Negeri Padang, Padang, 25131, Indonesia
