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사범대학
과학교육과
Journal papers
View : 6 Download: 0
Nonproportionality of NaI(Tl) scintillation detector for dark matter search experiments
Title
Nonproportionality of NaI(Tl) scintillation detector for dark matter search experiments
Authors
Lee
;
S.M.
;
Adhikari
;
G.
;
Carlin
;
N.
;
Cho
;
J.Y.
;
Choi
;
J.J.
;
S.
;
Ezeribe
;
A.C.
;
França
;
L.E.
;
Ha
;
C.
;
Hahn
;
I.S.
;
Hollick
;
S.J.
;
Jeon
;
E.J.
;
Joo
;
H.W.
;
Kang
;
W.G.
;
Kauer
;
M.
;
Kim
;
B.H.
;
H.J.
;
J.
;
K.W.
;
S.H.
;
S.K.
;
S.W.
;
W.K.
;
Y.D.
;
Y.H.
;
Ko
;
Y.J.
;
D.H.
;
E.K.
;
H.
;
H.S.
;
H.Y.
;
M.H.
;
Leonard
;
D.S.
;
Luan
;
N.T.
;
Manzato
;
B.B.
;
Maruyama
;
R.H.
;
Neal
;
R.J.
;
Nikkel
;
J.A.
;
Olsen
;
S.L.
;
Park
;
B.J.
;
H.K.
;
J.C.
;
K.S.
;
S.D.
;
Pitta
;
R.L.C.
;
Prihtiadi
;
Ra
;
Rott
;
Shin
;
K.A.
;
Cavalcante
;
D.F.F.S.
;
Scarff
;
A.
;
Son
;
M.K.
;
Spooner
;
N.J.C.
;
Truc
;
L.T.
;
Yang
;
L.
;
Yu
;
G.H.
Ewha Authors
한인식
SCOPUS Author ID
한인식
Issue Date
2024
Journal Title
European Physical Journal C
ISSN
1434-6044
Citation
European Physical Journal C vol. 84, no. 5
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
We present a comprehensive study of the nonproportionality of NaI(Tl) scintillation detectors within the context of dark matter search experiments. Our investigation, which integrates COSINE-100 data with supplementary γ spectroscopy, measures light yields across diverse energy levels from full-energy γ peaks produced by the decays of various isotopes. These γ peaks of interest were produced by decays supported by both long and short-lived isotopes. Analyzing peaks from decays supported only by short-lived isotopes presented a unique challenge due to their limited statistics and overlapping energies, which was overcome by long-term data collection and a time-dependent analysis. A key achievement is the direct measurement of the 0.87 keV light yield, resulting from the cascade following electron capture decay of 22Na from internal contamination. This measurement, previously accessible only indirectly, deepens our understanding of NaI(Tl) scintillator behavior in the region of interest for dark matter searches. This study holds substantial implications for background modeling and the interpretation of dark matter signals in NaI(Tl) experiments. © The Author(s) 2024.
DOI
10.1140/epjc/s10052-024-12770-1
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