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Planer $$gamma$$ camera imaging and analysis of the dynamics of radiocesium in plants caused by the Fukushima Daiichi Nuclear Power Plant accident

プラナー型$$gamma$$カメラを用いた福島第一原子力発電所事故に由来する植物中放射性セシウムの可視化

河地 有木; 尹 永根; 鈴井 伸郎; 石井 里美; 渡部 浩司*; 山本 誠一*; 藤巻 秀

Kawachi, Naoki; Yin, Y.-G.; Suzui, Nobuo; Ishii, Satomi; Watabe, Hiroshi*; Yamamoto, Seiichi*; Fujimaki, Shu

We chose a $$gamma$$ camera for $$gamma$$ ray imaging of Cs-137 emitting at 662 keV. Since incident $$gamma$$ ray energy is high, a tungsten pinhole collimator was fabricated to avoid the penetration and scattering of $$gamma$$ rays inside the collimator. A GSO scintillator with a thickness of 15 mm and a flat panel PS-PMT were adapted to the $$gamma$$ camera to obtain adequately high sensitivity. Giant knotweed (${it Reynoutria sachalinensis}$), a potential cleanup plant with high uptake capacity for cesium, was grown in hydroponic solutions and exposed to approximately 400 kBq of Cs-137, after which images were taken for 15 h to reveal the changing distribution of cesium into the plant from the hydroponic solutions via the root system.

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English

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発表会議名

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2012 IEEE Nuclear Science Symposium and Medical Imaging Conference, and Room-Temperature Semiconductor X-Ray and $$gamma$$-Ray Detectors Workshop (2012 IEEE NSS/MIC/RTSD)

開催年月

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2012/10

開催都市

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Anaheim

開催国

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U.S.A.

キーワード

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福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident

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