Isotopic analysis of individual uranium particles by secondary ion mass spectrometry using automated particle measurement

Esaka, Fumitaka  ; Suzuki, Daisuke   ; Yomogida, Takumi   ; Magara, Masaaki  

Analysis of individual uranium particles in environmental samples taken at nuclear facilities enables to clarify nuclear activities in the facilities. In particular, the detection of high enriched uranium particles is important to unveil nuclear activities related to the production of nuclear weapons. In this study, we developed analytical techniques by the combination of secondary ion mass spectrometry (SIMS) or thermal ionization mass spectrometry with automated particle measurement. The results indicated that these techniques are efficient to detect high enriched uranium particles.