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

高速中性子照射によるラジエータ付KCl:$$^{2+}$$蛍光体のストレージ特性

坂佐井 馨  ; 岩元 洋介   ; 中村 龍也  ; 藤 健太郎  ; 高倉 耕祐; 今野 力  

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

$$gamma$$線感度のKCl:Eu$$^{2+}$$蛍光体及び陽子発生源としてのポリエチレンシートを用いて高速中性子検出を試みた。最大の輝尽性蛍光出力が得られるのは14.8MeV中性子に対して約3mmであり、これはPHITSによるモンテカルロシミュレーションの結果と一致した。高速中性子発生に伴う$$gamma$$線の影響は無視できる程度であった。本蛍光体とポリエチレンシートの組合せは高速中性子モニタリングやイメージングに有効である。

Storage phosphors such as KCl:Eu$$^{2+}$$ with low $$gamma$$-ray sensitivity were applied to detection of fast neutrons using polyethylene (PE) sheets as a proton generator that were set in front of the phosphors. The maximum PSL yields were obtained at a PE thickness of 3 mm when the neutron energy was 14.8 MeV. 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 in a high $$gamma$$-ray fields.

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パーセンタイル:54.1

分野:Engineering, Electrical & Electronic

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