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Report No.

Characteristics of a SrBPO$$_{5}$$:Eu$$^{2+}$$ storage phosphor for neutron imaging

Sakasai, Kaoru; Katagiri, Masaki; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*; Kondo, Yasuhiro*

A phosphor material such as SrBPO$$_{5}$$:Eu$$^{2+}$$ has been investigated for two-dimensional imaging for pulsed-neutron source. The authors found this phosphor itself shows photostimulated luminescence (PSL) by illumination of 635 nm laser light after neutron irradiation without adding any neutron sensitive materials such as Gd. The PSL intensity per neutron flux was proportional to E$$^{-0.5}$$, where E is neutron energy. The neutron sensitivity was increased by using enriched boron instead of natural boron. The S$$_{gamma}$$/S$$_{n}$$ ratio of this phosphor using enriched boron was better than that of a commercially available imaging plate, where S$$_{gamma}$$ and S$$_{n}$$ are gamma and neutron sensitivities, respectively.



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