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Study of fast neutron detector for COSINE-100 experiment

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Title
Study of fast neutron detector for COSINE-100 experiment
Author(s)
Adhikari G.; Adhikari P.; Changhyon Ha; Eun Ju Jeon; Kyungwon Kim; Nam Young Kim; Yeongduk Kim; Young Ju Ko; Hyun Su Lee; Jaison Lee; Moo Hyun Lee; Maruyama R.H.; Stephen Lars Olsen; Prihtiadi Hafizh
Publication Date
2018-06
Journal
Journal of Instrumentation, v.13, no.6, pp.T06005 -
Publisher
IOP PUBLISHING LTD
Abstract
A monitoring system for fast neutrons is planned in the COSINE experiment, a dark matter experiment with NaI crystals. We pursued several R&D approaches for a neutron detector using a liquid scintillator (LS). A pulse shape discrimination (PSD) technique is used for the identification of neutron events and the PSD properties of two different LS were compared. A good separation power between neutrons and γ has been achieved for energies between 200 keVee to 1500 keVee. The combination of alumina adsorption, filtration, and water extraction is effective in purifying the LS, which leads to a reduction in the α contamination by 210Po of more than a factor of two. The measured activities of the internal α are 0.36±0.04 mBq/kg and 0.21±0.03 mBq/kg before and after purification, respectively. © 2018 IOP Publishing Ltd and Sissa Medialab
URI
https://pr.ibs.re.kr/handle/8788114/5271
ISSN
1748-0221
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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