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Report No.
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Age determination analysis of a single uranium particle for safeguards

Suzuki, Daisuke  ; Tomita, Ryohei ; Tomita, Jumpei ; Esaka, Fumitaka ; Yasuda, Kenichiro  ; Miyamoto, Yutaka  

An analytical technique was developed to determine the age of uranium particles for safeguards. After the chemical separation of uranium and thorium, the $$^{230}$$Th/$$^{234}$$U ratio was measured using single-collector inductively coupled plasma mass spectrometry and a $$^{233}$$U-based reference material comprising a certain amount of $$^{229}$$Th as a progeny nuclide of $$^{233}$$U. The results allowed us to determine the purification age of two certified materials, i.e., U-850 and U-100, which was in good agreement with the reference purification age (61 y). Moreover, the age of a single U-850 particle was determined with a difference of -28 to 2 years from the reference date.

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Category:Chemistry, Analytical

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