Micro-Raman spectroscopy combined with micro-sampling for chemical state analysis of individual uranium particles with sub-micrometer size

Yomogida, Takumi   ; Esaka, Fumitaka  ; Miyamoto, Yutaka   

Identification of the chemical forms of individual uranium particles in environmental samples is important tool for deducing the nuclear activity at nuclear facilities. However, there are few reports on the chemical state analysis of sub-micron sized uranium particles. In this study, micro-sampling and micro-Raman spectroscopy were applied in combination to analyze uranium particles with sub-micrometer size. As a result, the chemical form of individual uranium particles with sub-micrometer size can be analyzed non-destructively thanks to the optimization of the laser power at a micro-Raman measurement.