Research progress on the analysis and application of radioactive hot particle

Zhao, Guifang; Shao, Yang; Luo, Min; Xu, Diandou; Li, Duohong; Liu, Zhiming; Ma, Lingling

doi:10.1016/j.jenvrad.2023.107313

Cited by 2 publications

(1 citation statement)

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“…This technique usually employs the use of dry separation with imaging methods such as phosphor screen autoradiography 26 and solid-state nuclear track detection (SSNTD) 1 , or wet separation with gamma spectroscopy 27 . Gamma spectroscopy is often used as a pre-screening technique to identify radionuclides contained in the particle and quantify their activities 28 . However, it does not provide spatial information on the particles needed for locating and extraction.…”

Section: Introductionmentioning

confidence: 99%

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

Ang,

Bongrand,

Duval

et al. 2024

Sci Rep

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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 (≲100 µm) 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 (~ 1%).

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Section: Introductionmentioning

confidence: 99%