Scintillation neutron detectors based on a wavelength-shifting optical fiber using 232Th+ZnS(Ag)

BAI Zhaole; ZHOU Qi; YANG Nan; LIU Feng; YANG Zhongjian; CHEN Baowei; WANG Jianlong

doi:10.16511/j.cnki.qhdxxb.2018.26.028

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (6) : 558-562. DOI: 10.16511/j.cnki.qhdxxb.2018.26.028

NUCLEAR ENERGY AND NEW ENERGY

Scintillation neutron detectors based on a wavelength-shifting optical fiber using ²³²Th+ZnS(Ag)

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Abstract

Optical fiber scintillator neutron detectors have developed rapidly in recent years because these detectors are small (so that they can be extended into narrow spaces) and give real-time measurements. However, the probe detection efficiency is low due to the small size of the probe's effective detection material. This study presents a theoretical and experimental study of a ²³²Th+ ZnS(Ag) neutron detector with a wavelength-shifting fiber was used to improve the detection efficiency. This detector was used to measure the neutron distribution of the ADS sub-critical experimental assembly with the measurement results being consistent with the theoretical model which indicates that the high detection efficiency is very good and the wavelength-shifting fiber neutron detector is accurate.

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wavelength-shifting fiber / scintillator neutron detector / detection efficiency

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BAI Zhaole, ZHOU Qi, YANG Nan, LIU Feng, YANG Zhongjian, CHEN Baowei, WANG Jianlong. Scintillation neutron detectors based on a wavelength-shifting optical fiber using ²³²Th+ZnS(Ag)[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(6): 558-562 https://doi.org/10.16511/j.cnki.qhdxxb.2018.26.028

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