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A Study of NaI(Tl) crystal encapsulation using organic scintillators for the dark matter search

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Title
A Study of NaI(Tl) crystal encapsulation using organic scintillators for the dark matter search
Author(s)
Lee J.Y.; Adhikari G.; Chang Hyon Ha; Kim H.J.; Nam Young Kim; Kim S.K.; Yeongduk Kim; Hyun Su Lee
Publication Date
2020-02
Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.953, no., pp.163141 -
Publisher
ELSEVIER SCIENCE BV
Abstract
© 2019 Elsevier B.V.Scintillating NaI(Tl) crystals are used for various rare decay experiments, such as dark matter searches. However, the hygroscopicity of NaI(Tl) crystals makes the construction of crystal detectors in these experiments challenging. Therefore, the crystal requires a tight encapsulation to prevent from air contact. More importantly, in a low radioactivity measurement, identification of external radiations and surface contamination is crucial to characterize the origin of total crystal radioactivities. Studies for the NaI(Tl) crystal encapsulation with active organic scintillator vetoes have been performed to mitigate the above-mentioned issues simultaneously. A bare crystal is directly coupled with liquid and plastic scintillators to tag external radiations that penetrate from the outer part of the crystal. We report the pulse shape discrimination between organic scintillator and the crystal scintillator in a single detector setup and their long-term stability
URI
https://pr.ibs.re.kr/handle/8788114/7010
ISSN
0168-9002
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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