Measurement of production date (age) of nanogram amount of uranium
JRC-Karlsruhe obtained a swipe sample from a highly enriched uranium seizure, which took place in 2011. Due to the very low amount of uranium (nanogram) 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 weight-%) and the production date (December 1992 ± 1 year) determined by MC-ICP-MS indicated that the material was similar with two other HEU cases seized earlier in Europe.
VARGA Zsolt;
WALLENIUS Maria;
NICHOLL Adrian;
MAYER Klaus;
BALAN Ionel;
BENEA Vasile;
2019-12-05
SPRINGER
JRC116662
0236-5731 (online),
https://link.springer.com/article/10.1007/s10967-019-06705-4,
https://publications.jrc.ec.europa.eu/repository/handle/JRC116662,
10.1007/s10967-019-06705-4 (online),
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