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 SM ISO690:2012VARGA, Zsolt, WALLENIUS, Maria, NICHOLL, Adrian, MAYER, Klaus, BALAN, Ionel, BENEA, Vasile. Measurement of production date (age) of nanogram amount of uranium. In: Journal of Radioanalytical and Nuclear Chemistry, 2019, nr. 3(322), pp. 1585-1591. ISSN 0236-5731. DOI: https://doi.org/10.1007/s10967-019-06705-4 |
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  Journal of Radioanalytical and Nuclear Chemistry |
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| Numărul 3(322) / 2019 / ISSN 0236-5731 /ISSNe 1588-2780 | ||||||
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| DOI:https://doi.org/10.1007/s10967-019-06705-4 | ||||||
| Pag. 1585-1591 | ||||||
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JRC-Karlsruhe obtained a swipe sample from a highly enriched uranium seizure, which had taken place in 2011. Due to the very low amount of uranium (nanograms) a new method needed to be developed to determine the U production date (age). The particles on the swipe were collected on a pyrolytic graphite planchet using a vacuum impactor and they were subsequently leached with ccHNO3. The “bulk” U isotopic composition (235U: 72.51 ± 0.03 wt%) and the production date (December 1992 ± 1 year) determined by MC-ICP-MS indicated that the material showed similarity with two other HEU cases seized earlier in Europe. |
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| Cuvinte-cheie Inductively coupled plasma mass spectrometry, Nuclear forensics, Production date, Swipe sample, uranium |
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