Characteristic X-ray detector: In-situ imaging of radioactive contaminant distributions |
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| Institution: | 1. National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan;2. Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan;1. School of Material Science and Engineering, Shanghai University, Shanghai, 200444, China;2. Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, 201800, China;1. Shanghai University, School of Materials Science and Engineering, Shanghai 200444, China;2. Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 201800, China;1. UMR 7194 – Histoire Naturelle de l’Homme Préhistorique (HNHP), CNRS, UPVD, MNHN, Sorbonne Universités, France;2. Centre de recherche et de restauration des musées de France, C2RMF, Palais du Louvre – Porte des Lions, 14 Quai François Mitterrand, 75001 Paris, France;3. Fédération de recherche NewAGLAE, FR3506 CNRS, Ministère de la Culture et de la Communication, Chimie ParisTech, Palais du Louvre, 75001 Paris, France;4. Laboratoire de Mesure du Carbone 14 (LMC14), LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France;1. Agfa-HealthCare NV, Septestraat 27, B-2640 Mortsel, Belgium;2. Electron Magnetic Resonance Research Group, Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, B-9000 Gent, Belgium;1. Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroc?aw, Poland;2. Institute Light Matter (ILM), UMR5306 CNRS-UCB Lyon1, University of Lyon, 69622 Villeurbanne, France;3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan |
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| Abstract: | The characteristic X-ray detector (CXRD), a CsI(Tl) scintillator with a 50-mm diameter, is a directional X-ray sensor that measures characteristic X-rays from radioactive material, such as 137Cs, and identifies the direction of radioactive contamination. We evaluated a CXRD and visualized the distribution of radioactivity in the contaminated area near the Fukushima Dai-ichi nuclear power station, where the ambient dose equivalent rate was 2.1 μSv/h at 1 m above ground level. We found a good correlation between the characteristic X-ray fluxes and the distribution of radioactive contaminants with a 0.823 Pearson product–moment correlation coefficient. |
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| Keywords: | Characteristic X-ray detector Gamma camera Fukushima Dai-ichi nuclear power station Radiation safety Decontamination |
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