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

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Title
Background model for the NaI(Tl) crystals in COSINE-100
Author(s)
Adhikari P.; Adhikari G.; Souza E.B.; Carlin N.; Choi S.; Choi W.Q.; Djamal M.; Ezeribe A.C.; Changhyon Ha; Hahn I.S.; Hubbard A.J.F.; Eun Ju Jeon; Jo J.H.; Joo H.W.; Woon Gu Kang; Kauer M.; Kang W.S.; Bong Hee Kim; Hyounggyu Kim; Kim H.J.; Kyungwon Kim; Kim M.C.; Nam Young Kim; Kim S.K.; Yeongduk Kim; Yong Hamb Kim; Kudryavtsev V.A.; Hyun Su Lee; Jaison Lee; Lee J.Y.; Moo Hyun Lee; Leonard Douglas; Lynch W.A.; Maruyama R.H.; Mouton F.; Olsen Stephen Lars; Park H.K.; Park H.S.; J.S. Park; Kang Soon Park; Pettus W.; Prihtiadi H.; Se Jin Ra; Rott C.; Scarff A.; Spooner N.J.C.; Thompson W.G.; Yang L.; Seonghyun Yong
Publication Date
2018-06
Journal
EUROPEAN PHYSICAL JOURNAL C, v.78, no.6, pp.490 -
Publisher
SPRINGER
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)
URI
https://pr.ibs.re.kr/handle/8788114/5270
ISSN
1434-6044
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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