IMPROVEMENT OF GAMMA-RAY SUBTRACTION PROCEDURE FOR A CURRENT-MODE NEUTRON DETECTOR WITH A PAIR OF 6Li- AND 7Li-GLASS SCINTILLATORS.
Journal
Radiation protection dosimetry
ISSN: 1742-3406
Titre abrégé: Radiat Prot Dosimetry
Pays: England
ID NLM: 8109958
Informations de publication
Date de publication:
12 Jun 2020
12 Jun 2020
Historique:
received:
30
06
2019
revised:
30
06
2019
accepted:
03
10
2019
pubmed:
21
11
2019
medline:
24
3
2021
entrez:
21
11
2019
Statut:
ppublish
Résumé
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.
Identifiants
pubmed: 31747040
pii: 5631929
doi: 10.1093/rpd/ncz266
doi:
Substances chimiques
Isotopes
0
Lithium-6
0
Californium
975X05H15A
Lithium
9FN79X2M3F
Californium-252
9J0Y94YP8Y
Americium-241
SK9YL6NK5M
Americium
VW92PHU2UY
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
117-122Informations de copyright
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