Abstract:
:A current-mode neutron detector with a pair of 6Li- and 7Li-glass scintillators has been developed to measure high-flux neutrons in a boron neutron capture therapy field. Neutrons are basically measured by subtracting gamma-ray component using current outputs from the 7Li-glass scintillator. In the present study, the difference in the gamma-ray sensitivity between the 6Li- and 7Li-glass scintillators and the neutron sensitivity for the 7Li-glass scintillator due to the 6Li contamination were also considered to improve the gamma-ray subtraction precision. The gamma-ray subtraction procedure was experimentally investigated in thermal neutron fields with 252Cf and 241Am-Be neutron sources, which have different gamma-ray intensities per unit neutron fluence. A linear relation between neutron fluence and current output was obtained for the neutron detector in the two types of thermal neutron fields with different gamma-ray intensities. It was found that the gamma-ray subtraction procedure is useful for current-mode neutron detectors.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Matsumoto T,Masuda A,Harano H,Hori JI,Sano Tdoi
10.1093/rpd/ncz266subject
Has Abstractpub_date
2020-06-12 00:00:00pages
117-122issue
1eissn
0144-8420issn
1742-3406pii
5631929journal_volume
188pub_type
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journal_title:Radiation protection dosimetry
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