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Determination of plutonium isotope ratios in individual uranium-plutonium mixed particles with inductively coupled plasma mass spectrometry

Esaka, Fumitaka ; Suzuki, Daisuke  ; Miyamoto, Yutaka  ; Magara, Masaaki 

An analytical technique was developed by a combination of single particle dissolution, chemical separation of uranium, plutonium and americium with extraction chromatography using UTEVA resins and measurement with inductively coupled plasma mass spectrometry (ICP-MS). This method was applied to plutonium isotope ratio analysis of individual U-Pu particles with U/Pu ratios ranging from 1 to 70. Consequently, $$^{240}$$Pu/$$^{239}$$Pu, $$^{241}$$Pu/$$^{239}$$Pu and $$^{242}$$Pu/$$^{239}$$Pu isotope ratios were successfully determined, while it was impossible to determine $$^{238}$$Pu/$$^{239}$$Pu ratios due to the high process blank values on m/z 238.

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Category:Chemistry, Analytical

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