Detecting radioactive particles in complex environmental samples using real-time autoradiography

被引:2
作者
Ang, Joyce W. L. [1 ,2 ]
Bongrand, Arthur [3 ,4 ]
Duval, Samuel [3 ]
Donnard, Jerome [3 ]
Jolis, Ester M. [5 ]
Utsunomiya, Satoshi [6 ]
Minomo, Kenta [6 ]
Koivula, Risto [1 ]
Siitari-Kauppi, Marja [1 ]
Law, Gareth T. W. [1 ]
机构
[1] Univ Helsinki, Dept Chem, Radiochem Unit, Helsinki 00014, Finland
[2] Natl Univ Singapore, Singapore Nucl Safety & Res Initiat, Singapore 138602, Singapore
[3] Ai4r, 2 Rue Alfred Kastler, F-44307 Nantes, France
[4] Nantes Univ, IMT Atlantique, CNRS, SUBATECH, F-44000 Nantes, France
[5] Geol Survey Finland GTK, Circular Econ Solut Res Lab, Espoo 02151, Finland
[6] Kyushu Univ, Dept Chem, 744 Motooka,Nishi Ku, Fukuoka 8190395, Japan
基金
新加坡国家研究基金会; 芬兰科学院;
关键词
NUCLEAR-POWER-PLANT; CHERNOBYL; CESIUM; RATIO;
D O I
10.1038/s41598-024-52876-w
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Radioactive particles often contain very high radioactivity concentrations and are widespread. They pose a potential risk to human health and the environment. Their detection, quantification, and characterization are crucial if we are to understand their impact. Here, we present the use of a real-time autoradiography gaseous detector (using parallel ionization multiplier) to expedite and improve the accuracy of radioactive particle screening in complex environmental samples. First, standard particles were used to assess the detector capabilities (spatial resolution, spectrometry, and artefact contributions), then, we applied the technique to more complex and environmentally relevant samples. The real-time autoradiography technique provides data with a spatial resolution (less than or similar to 100 mu m) suitable for particle analysis in complex samples. Further, it can differentiate between particles predominantly emitting alpha and beta radiation. Here, the technique is applied to radioactive cesium-rich microparticles collected from the Fukushima Daiichi nuclear exclusion zone, showing their accurate detection, and demonstrating the viability of real-time autoradiography in environmental scenarios. Indeed, for more complex samples (radioactive particles in a less radioactive heterogeneous background mix of minerals), the technique permits relatively high selectivity for radioactive particle screening (up to 61.2% success rate) with low false positive percentages (similar to 1%).
引用
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页数:13
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