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

Title
Background model for the NaI(Tl) crystals in COSINE-100
Authors
Adhikari P.Adhikari G.Souza E.B.Carlin N.Choi S.Choi W.Q.Djamal M.Ezeribe A.C.Ha C.Hahn I.S.Hubbard A.J.F.Jeon E.J.Jo J.H.Joo H.W.Kang W.G.Kauer M.Kang W.S.Kim 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.Kudryavtsev V.A.Lee H.S.Lee J.Lee J.Y.Lee M.H.Leonard D.S.Lynch W.A.Maruyama R.H.Mouton F.Olsen S.L.Park H.K.Park H.S.Park J.S.Park K.S.Pettus W.Prihtiadi H.Ra S.Rott C.Scarff A.Spooner N.J.C.Thompson W.G.Yang L.Yong S.H.
Ewha Authors
한인식
SCOPUS Author ID
한인식scopus
Issue Date
2018
Journal Title
European Physical Journal C
ISSN
1434-6044JCR Link
Citation
European Physical Journal C vol. 78, no. 6
Publisher
Springer New York LLC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
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 210Pb and 3H. © 2018, The Author(s).
DOI
10.1140/epjc/s10052-018-5970-2
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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