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Report No.

Storage characteristics of KBr:Eu$$^{2+}$$ phosphors with radiators by irradiation of fast neutrons

Sakasai, Kaoru  ; Iwamoto, Yosuke   ; To, Kentaro  ; Nakamura, Tatsuya  ; Takakura, Kosuke; Konno, Chikara  

Storage characteristics of KBr:Eu$$^{2+}$$ phosphor were investigated when the phosphor was irradiated by fast neutron with energy of 14.8 MeV. To improve the fast neutron sensitivity, polyethylene (PE) sheets as a proton generator were set in front of the phosphors. The maximum photostimulated luminescence (PSL) yields were obtained at a PE thickness of about 3 mm. These experimental results well agreed with those by Monte Carlo simulation using PHITS code. Estimated PSL yields by $$gamma$$-ray associated with fast neutron fields were negligible. This combination use of such phosphors and PE sheets will be usable for fast neutron monitoring or imaging.



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