European Physical Journal C: Particles and Fields (Jun 2018)
Background model for the NaI(Tl) crystals in COSINE-100
- P. Adhikari,
- G. Adhikari,
- E. Barbosa de Souza,
- N. Carlin,
- S. Choi,
- W. Q. Choi,
- M. Djamal,
- A. C. Ezeribe,
- C. Ha,
- I. S. Hahn,
- A. J. F. Hubbard,
- E. J. Jeon,
- J. H. Jo,
- H. W. Joo,
- W. G. Kang,
- M. Kauer,
- W. S. Kang,
- B. H. Kim,
- H. Kim,
- H. J. Kim,
- K. W. Kim,
- M. C. Kim,
- N. Y. Kim,
- S. K. Kim,
- Y. D. Kim,
- Y. H. Kim,
- V. A. Kudryavtsev,
- H. S. Lee,
- J. Lee,
- J. Y. Lee,
- M. H. Lee,
- D. S. Leonard,
- W. A. Lynch,
- R. H. Maruyama,
- F. Mouton,
- S. L. Olsen,
- H. K. Park,
- H. S. Park,
- J. S. Park,
- K. S. Park,
- W. Pettus,
- H. Prihtiadi,
- S. Ra,
- C. Rott,
- A. Scarff,
- N. J. C. Spooner,
- W. G. Thompson,
- L. Yang,
- S. H. Yong
Affiliations
- P. Adhikari
- Department of Physics and Astronomy, Sejong University
- G. Adhikari
- Department of Physics and Astronomy, Sejong University
- E. Barbosa de Souza
- Wright Laboratory, Department of Physics, Yale University
- N. Carlin
- Physics Institute, University of São Paulo
- S. Choi
- Department of Physics and Astronomy, Seoul National University
- W. Q. Choi
- Korea Institue of Science and Technology Information
- M. Djamal
- Department of Physics, Bandung Institute of Technology
- A. C. Ezeribe
- Department of Physics and Astronomy, University of Sheffield
- C. Ha
- Center for Underground Physics, Institute for Basic Science (IBS)
- I. S. Hahn
- Department of Science Education, Ewha Womans University
- A. J. F. Hubbard
- Wright Laboratory, Department of Physics, Yale University
- E. J. Jeon
- Center for Underground Physics, Institute for Basic Science (IBS)
- J. H. Jo
- Wright Laboratory, Department of Physics, Yale University
- H. W. Joo
- Department of Physics and Astronomy, Seoul National University
- W. G. Kang
- Center for Underground Physics, Institute for Basic Science (IBS)
- M. Kauer
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison
- W. S. Kang
- Department of Physics, Sungkyunkwan University
- B. H. Kim
- Center for Underground Physics, Institute for Basic Science (IBS)
- H. Kim
- Center for Underground Physics, Institute for Basic Science (IBS)
- H. J. Kim
- Department of Physics, Kyungpook National University
- K. W. Kim
- Center for Underground Physics, Institute for Basic Science (IBS)
- M. C. Kim
- Department of Physics, Sungkyunkwan University
- N. Y. Kim
- Center for Underground Physics, Institute for Basic Science (IBS)
- S. K. Kim
- Department of Physics and Astronomy, Seoul National University
- Y. D. Kim
- Department of Physics and Astronomy, Sejong University
- Y. H. Kim
- Center for Underground Physics, Institute for Basic Science (IBS)
- V. A. Kudryavtsev
- Department of Physics and Astronomy, University of Sheffield
- H. S. Lee
- Center for Underground Physics, Institute for Basic Science (IBS)
- J. Lee
- Center for Underground Physics, Institute for Basic Science (IBS)
- J. Y. Lee
- Department of Physics and Astronomy, Seoul National University
- M. H. Lee
- Center for Underground Physics, Institute for Basic Science (IBS)
- D. S. Leonard
- Center for Underground Physics, Institute for Basic Science (IBS)
- W. A. Lynch
- Department of Physics and Astronomy, University of Sheffield
- R. H. Maruyama
- Wright Laboratory, Department of Physics, Yale University
- F. Mouton
- Department of Physics and Astronomy, University of Sheffield
- S. L. Olsen
- Center for Underground Physics, Institute for Basic Science (IBS)
- H. K. Park
- Department of Accelerator Science, Graduate School, Korea University
- H. S. Park
- Korea Research Institute of Standards and Science
- J. S. Park
- Center for Underground Physics, Institute for Basic Science (IBS)
- K. S. Park
- Center for Underground Physics, Institute for Basic Science (IBS)
- W. Pettus
- Wright Laboratory, Department of Physics, Yale University
- H. Prihtiadi
- Department of Physics, Bandung Institute of Technology
- S. Ra
- Center for Underground Physics, Institute for Basic Science (IBS)
- C. Rott
- Department of Physics, Sungkyunkwan University
- A. Scarff
- Department of Physics and Astronomy, University of Sheffield
- N. J. C. Spooner
- Department of Physics and Astronomy, University of Sheffield
- W. G. Thompson
- Wright Laboratory, Department of Physics, Yale University
- L. Yang
- Department of Physics, University of Illinois at Urbana-Champaign
- S. H. Yong
- Center for Underground Physics, Institute for Basic Science (IBS)
- DOI
- https://doi.org/10.1140/epjc/s10052-018-5970-2
- Journal volume & issue
-
Vol. 78,
no. 6
pp. 1 – 10
Abstract
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 $$^{210}$$ 210 Pb and $$^3$$ 3 H.
