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      Background model for the NaI(Tl) crystals in COSINE-100

      1 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 2 , , 8 , 2 , 4 , 8 , 11 , 10 , 8 , 8 , 12 , 8 , 10 , 8 , 4 , 1 , 8 , 8 , 13 , 7 , 8 , 8 , 4 , 8 , 8 , 7 , 2 , 7 , 8 , 15 , 13 , 8 , 8 , 2 , 6 , 8 , 10 , 7 , 7 , 2 , 14 , 8

      The European Physical Journal. C, Particles and Fields

      Springer Berlin Heidelberg

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          Abstract

          The COSINE-100 dark matter search experiment is an array of NaI(Tl) crystal detectors located in the Yangyang Underground Laboratory (Y2L). To understand measured backgrounds in the NaI(Tl) crystals we have performed Monte Carlo simulations using the Geant4 toolkit and developed background models for each crystal that consider contributions from both internal and external sources, including cosmogenic nuclides. The background models are based on comparisons of measurement data with Monte Carlo simulations that are guided by a campaign of material assays and are used to evaluate backgrounds and identify their sources. The average background level for the six crystals (70 kg total mass) that are studied is 3.5 counts/day/keV/kg in the (2–6) keV energy interval. The dominant contributors in this energy region are found to be \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{210}$$\end{document} Pb and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^3$$\end{document} H.

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          Author and article information

          Contributors
          ejjeon@ibs.re.kr
          Journal
          Eur Phys J C Part Fields
          Eur Phys J C Part Fields
          The European Physical Journal. C, Particles and Fields
          Springer Berlin Heidelberg (Berlin/Heidelberg )
          1434-6044
          1434-6052
          12 June 2018
          12 June 2018
          2018
          : 78
          : 6
          Affiliations
          [1 ]ISNI 0000 0001 0727 6358, GRID grid.263333.4, Department of Physics and Astronomy, , Sejong University, ; Seoul, 05006 South Korea
          [2 ]ISNI 0000000419368710, GRID grid.47100.32, Wright Laboratory, Department of Physics, , Yale University, ; New Haven, CT 06520 USA
          [3 ]ISNI 0000 0004 1937 0722, GRID grid.11899.38, Physics Institute, , University of São Paulo, ; São Paulo, 05508-090 Brazil
          [4 ]ISNI 0000 0004 0470 5905, GRID grid.31501.36, Department of Physics and Astronomy, , Seoul National University, ; Seoul, 08826 Republic of Korea
          [5 ]Korea Institue of Science and Technology Information, Daejeon, 34141 Republic of Korea
          [6 ]ISNI 0000 0004 1808 0563, GRID grid.434933.a, Department of Physics, , Bandung Institute of Technology, ; Bandung, 40132 Indonesia
          [7 ]ISNI 0000 0004 1936 9262, GRID grid.11835.3e, Department of Physics and Astronomy, , University of Sheffield, ; Sheffield, S3 7RH UK
          [8 ]ISNI 0000 0004 1784 4496, GRID grid.410720.0, Center for Underground Physics, , Institute for Basic Science (IBS), ; Daejeon, 34126 Republic of Korea
          [9 ]ISNI 0000 0001 2171 7754, GRID grid.255649.9, Department of Science Education, , Ewha Womans University, ; Seoul, 03760 Republic of Korea
          [10 ]ISNI 0000 0001 2181 989X, GRID grid.264381.a, Department of Physics, , Sungkyunkwan University, ; Seoul, 16419 Republic of Korea
          [11 ]ISNI 0000 0001 2167 3675, GRID grid.14003.36, Department of Physics and Wisconsin IceCube Particle Astrophysics Center, , University of Wisconsin-Madison, ; Madison, WI 53706 USA
          [12 ]ISNI 0000 0001 0661 1556, GRID grid.258803.4, Department of Physics, , Kyungpook National University, ; Daegu, 41566 Republic of Korea
          [13 ]ISNI 0000 0001 2301 0664, GRID grid.410883.6, Korea Research Institute of Standards and Science, ; Daejeon, 34113 Republic of Korea
          [14 ]ISNI 0000 0004 1936 9991, GRID grid.35403.31, Department of Physics, , University of Illinois at Urbana-Champaign, ; Urbana IL, 61801 USA
          [15 ]ISNI 0000 0001 0840 2678, GRID grid.222754.4, Department of Accelerator Science, Graduate School, , Korea University, ; Sejong, 30019 South Korea
          Article
          5970
          10.1140/epjc/s10052-018-5970-2
          6424159
          © The Author(s) 2018

          Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

          Funded by SCOAP 3

          Funding
          Funded by: Institute for Basic science
          Award ID: IBS-R016-A1
          Funded by: FundRef http://dx.doi.org/10.13039/100001395, Wisconsin Alumni Research Foundation;
          Award ID: DEFC52-08NA28752
          Funded by: FundRef http://dx.doi.org/10.13039/501100003593, Conselho Nacional de Desenvolvimento Científico e Tecnológico;
          Award ID: 2017/02952-0
          Funded by: FundRef http://dx.doi.org/10.13039/100000879, Alfred P. Sloan Foundation;
          Award ID: DGE-1122492
          Award ID: DGE-1256259
          Funded by: FundRef http://dx.doi.org/10.13039/100000879, Alfred P. Sloan Foundation;
          Award ID: PHY-1151795
          Award ID: PHY-1457995
          Funded by: FundRef http://dx.doi.org/10.13039/501100000271, Science and Technology Facilities Council;
          Award ID: ST/K001337/1
          Award ID: ST/N000277/1
          Categories
          Regular Article - Experimental Physics
          Custom metadata
          © SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2018

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