ROBUST TECHNIQUE USING AN IMAGING PLATE TO DETECT ENVIRONMENTAL RADIOACTIVITY
ROBUST TECHNIQUE USING AN IMAGING PLATE TO DETECT ENVIRONMENTAL RADIOACTIVITY
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DOI：
10.1097/hp.0b013e31827d41a9
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发表时间：
2013-04-01
期刊：
影响因子：
2.2
通讯作者：
Sakae, Takeji
中科院分区：
文献类型：
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作者：
Isobe, Tomonori;Mori, Yutaro;Sakae, Takeji
福岛第一核电站在2011年3月11日的东日本大地震中遭到严重破坏。因此，大量放射性物质意外泄漏。最近的重点是环境放射性物质的量化。然而，常规技术需要复杂且昂贵的测量设备。在这项研究中，作者开发了一种简单的方法来检测环境放射性物质的成像板（IP）。有两个具体的测量对象：测量土壤中放射性物质的深度分布和建筑物屋顶的表面污染。对于土壤中放射性物质深度分布的测量，作者确定了土壤中环境放射性浓度在地表以下5cm处最高，并随深度而降低。为了测量建筑物屋顶的表面污染，作者创建了建筑物屋顶的污染图。研制的探测器可以直接接触地面，与其他测量仪不同，它不受周边放射性的影响。本研究验证了用IP测量环境放射性的可行性。虽然IP的测量值是相对的，但计划进一步开展工作，以评估放射性物质的绝对数量。健康物理学104（4）：362-365; 2013
The Fukushima Daiichi Nuclear Power Plant was severely damaged by the Great East Japan Earthquake on 11 March 2011. Consequently, a large amount of radioactive material was accidentally released. Recently, the focus has been on quantification of environmental radioactive material. However, conventional techniques require complicated and expensive measurement equipment. In this research, the authors developed a simple method to detect environmental radioactive material with an imaging plate (IP). Two specific measurement subjects were targeted: measurements for the depth distribution of radioactive material in soil and surface contamination of a building roof. For the measurement of depth distribution of radioactive material in soil, the authors ascertained that the concentration of environmental radioactivity was highest at 5 cm below the surface, and it decreased with depth. For the measurement of surface contamination of the building roof, the authors created a contamination map of the building roof. The detector developed could contact the ground directly, and unlike other survey meters, it was not influenced by peripheral radioactivity. In this study, the authors verified the feasibility of measurement of environmental radioactivity with an IP. Although the measured values of the IP were relative, further work is planned to perform evaluations of absolute quantities of radioactive material. Health Phys. 104(4):362-365; 2013