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Neutron background measurements with a hybrid neutron detector at the Kuo-Sheng Reactor Neutrino Laboratory
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Date
2018-08-02
Author
Sonay, A.
DENİZ, MUHAMMED
Wong, H. T.
Agartioglu, M.
Asryan, G.
Chen, J. H.
KERMAN, SAİME
Li, H. B.
Li, J.
Lin, F. K.
Lin, S. T.
Sevda, B.
Sharma, V
Singh, L.
Singh, M. K.
Singh, V
Soma, A. K.
Yang, S. W.
Yue, Q.
YILDIRIM, İBRAHİM SONER
Zeyrek, Mehmet Tevfik
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We report in situ neutron background measurements at the Kuo-Sheng Reactor Neutrino Laboratory (KSNL) by a hybrid neutron detector (HND) with a data size of 33.8 days under shielding configurations identical to those used during the neutrino physics data taking. The HND consists of BC-501A liquid and BC-702 phosphor powder scintillation neutron detectors, which are sensitive to both fast and thermal neutrons, respectively. Neutron-induced events for the two channels are identified and differentiated by pulse shape analysis, such that the backgrounds of both are simultaneously measured. The fast neutron fluxes are derived by an iterative unfolding algorithm. Neutron-induced backgrounds in the germanium detector under the same fluxes, due to both cosmic rays and ambient radioactivity, are derived and compared with the measurements. The results are valuable to background understanding of the neutrino data at the KSNL. In particular, neutron-induced background events due to ambient radioactivity as well as from reactor operation are negligible compared to intrinsic cosmogenic activity and ambient gamma activity. The detector concept and analysis procedures are applicable to neutron background characterization in similar rare-event experiments.
Subject Keywords
Performance
,
Scintillator
URI
https://hdl.handle.net/11511/40613
Journal
PHYSICAL REVIEW C
DOI
https://doi.org/10.1103/physrevc.98.024602
Collections
Department of Physics, Article
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A. Sonay et al., “Neutron background measurements with a hybrid neutron detector at the Kuo-Sheng Reactor Neutrino Laboratory,”
PHYSICAL REVIEW C
, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40613.