Improved Radio-Cesium Detection Using Quantitative Real-Time Autoradiography
Ang, J. W. L., Bongrand, A., Duval, S., Donnard, J., Parkkonen, J., Utsunomiya, S., Koivula, R., Siitari-Kauppi, M., & Law, G. T. W. (2023). Improved Radio-Cesium Detection Using Quantitative Real-Time Autoradiography. ACS Omega, 8(25), 22523-22535. https://doi.org/10.1021/acsomega.3c00728
Julkaistu sarjassa
ACS OmegaTekijät
Päivämäärä
2023Tekijänoikeudet
© 2023 The Authors. Published by American Chemical Society
Cesium-134 and -137 are prevalent, long-lived, radio-toxic contaminants released into the environment during nuclear accidents. Large quantities of insoluble, respirable Cs-bearing microparticles (CsMPs) were released into the environment during the Fukushima Daiichi nuclear accident. Monitoring for CsMPs in environmental samples is essential to understand the impact of nuclear accidents. The current detection method used to screen for CsMPs (phosphor screen autoradiography) is slow and inefficient. We propose an improved method: real-time autoradiography that uses parallel ionization multiplier gaseous detectors. This technique permits spatially resolved measurement of radioactivity while providing spectrometric data from spatially heterogeneous samples a potential step-change technique for use after nuclear accidents for forensic analysis. With our detector configuration, the minimum detectable activities are sufficiently low for detecting CsMPs. Further, for environmental samples, sample thickness does not detrimentally affect detector signal quality. The detector can measure and resolve individual radioactive particles ≥465 μm apart. Real-time autoradiography is a promising tool for radioactive particle detection.
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Julkaisija
American Chemical Society (ACS)ISSN Hae Julkaisufoorumista
2470-1343Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/183594918
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This research was supported by scholarship funding from the National Research Foundation, Singapore (J.W.L.A.), a grant from the Jenny and Antti Wihuri Foundation (J.W.L.A.), a grant from the University of Helsinki Rector’s fund (G.T.W.L.), and a collaborative grant from the Academy of Finland and Japan Society for Promotion of Science (decision 356246) (G.T.W.L. and S.U.).Lisenssi
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