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|Title:||Measurement of production date (age) of nanogram amount of uranium|
|Authors:||VARGA ZSOLT; WALLENIUS MARIA; NICHOLL ADRIAN; MAYER KLAUS; BALAN IONEL; BENEA VASILE|
|Citation:||JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY vol. 322 no. 3 p. 1585-1591|
|Type:||Articles in periodicals and books|
|Abstract:||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.|
|JRC Directorate:||Nuclear Safety and Security|
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