[16p-D311-1~11] 2.1 Detection Devices

[16p-D311-5] Development of the Long Wavelength Emission Oxide Scintillator for the Radiation Dose-Rate Monitoring System

〇(M1)Daisuke Matsukura^1,2, Shunsuke Kurosawa^2,3,4, Chihaya Fujiwara^1,2, Akihiro Yamaji^2,3, Yuji Ohashi^2,3, Yuui Yokota², Kei Kamada^2,3, Hiroki Sato^2,3, Satoshi Toyoda^2,3, Masao Yoshino^2,3, Takashi Hanada², Rikito Murakami², Takahiko Horiai^2,3, Akira Yoshikawa^2,3,5, Hiroki Tanaka⁶, Takushi Takata⁶ (1.Tohoku Univ. Graduate School of Eng., 2.Tohoku Univ. IMR, 3.Tohoku Univ. NICHe, 4.Osaka Univ. ILE, 5.C&A, 6.KURNS)

Keywords:Scintillator, Radiation detector

In the decommissioning step of the Fukushima Daiichi Nuclear Power Plant, a scintillator with high light yield and long wavelengths of above 650 nm are required for the dose-rate monitoring system. In this study, we investigated the scintillation properties for Cr³⁺-doped Gd₃Ga₅O₁₂, which is known to be red and near-infrared emitting and Ce co-doping samples. We discuss these results including the effect of Ce co-doping and report a demonstration test of the monitoring system with these red scintillators.