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Understanding internal backgrounds in NaI(Tl) crystals toward a 200 kg array for the KIMS-NaI experiment

Title
Understanding internal backgrounds in NaI(Tl) crystals toward a 200 kg array for the KIMS-NaI experiment
Authors
Adhikari P.Adhikari G.Choi S.Ha C.Hahn I.S.Jeon E.J.Joo H.W.Kang W.G.Kim H.J.Kim H.O.Kim K.W.Kim N.Y.Kim S.K.Kim Y.D.Kim Y.H.Lee H.S.Lee J.H.Lee M.H.Leonard D.S.Li J.Oh S.Y.Olsen S.L.Park H.K.Park H.S.Park K.S.So J.H.Yoon Y.S.
Ewha Authors
한인식
SCOPUS Author ID
한인식scopus
Issue Date
2016
Journal Title
European Physical Journal C
ISSN
1434-6044JCR Link
Citation
vol. 76, no. 4
Publisher
Springer New York LLC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The Korea Invisible Mass Search (KIMS) collaboration has developed low-background NaI(Tl) crystals that are suitable for the direct detection of WIMP dark matter. Building on experience accumulated during the KIMS-CsI programs, the KIMS-NaI experiment will consist of a 200 kg NaI(Tl) crystal array surrounded by layers of shielding structures and will be operated at the Yangyang underground laboratory. The goal is to provide an unambiguous test of the DAMA/LIBRA annual modulation signature. Measurements of six prototype crystals show progress in the reduction of internal contamination from radioisotopes. Based on our understanding of these measurements, we expect to achieve a background level in the final detector configuration that is less than 1 count/day/keV/kg for recoil energies around 2 keV. The annual modulation sensitivity for the KIMS-NaI experiment shows that an unambiguous 7 (Formula presented.) test of the DAMA/LIBRA signature would be possible with a 600 kg year exposure with this system. © 2016, The Author(s).
DOI
10.1140/epjc/s10052-016-4030-z
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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