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  • Direct isotope ratio analysis of individual uranium-plutonium mixed particles with various U/Pu ratios by thermal ionization mass spectrometry.

Direct isotope ratio analysis of individual uranium-plutonium mixed particles with various U/Pu ratios by thermal ionization mass spectrometry.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine (2014-12-06)
Daisuke Suzuki, Fumitaka Esaka, Yutaka Miyamoto, Masaaki Magara
摘要

Uranium and plutonium isotope ratios in individual uranium-plutonium (U-Pu) mixed particles with various U/Pu atomic ratios were analyzed without prior chemical separation by thermal ionization mass spectrometry (TIMS). Prior to measurement, micron-sized particles with U/Pu ratios of 1, 5, 10, 18, and 70 were produced from uranium and plutonium certified reference materials. In the TIMS analysis, the peaks of americium, plutonium, and uranium ion signals were successfully separated by continuously increasing the evaporation filament current. Consequently, the uranium and plutonium isotope ratios, except the (238)Pu/(239)Pu ratio, were successfully determined for the particles at all U/Pu ratios. This indicates that TIMS direct analysis allows for the measurement of individual U-Pu mixed particles without prior chemical separation.

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Sigma-Aldrich
铼, powder, 99.995% trace metals basis
Sigma-Aldrich
铼, foil, thickness 0.25 mm, 99.98% trace metals basis
铼, wire reel, 0.025m, diameter 1.0mm, annealed, 99.97%
铼, wire reel, 0.05m, diameter 0.5mm, annealed, 99.97%
铼, wire reel, 0.05m, diameter 1.0mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.076mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.10mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.125mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.15mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.178mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.25mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.2mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.3mm, annealed, 99.97%
铼, wire reel, 0.1m, diameter 0.5mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.125mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.15mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.178mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.25mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.2mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.3mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 0.5mm, annealed, 99.97%
铼, wire reel, 0.2m, diameter 1.0mm, annealed, 99.97%
铼, wire reel, 0.5m, diameter 0.076mm, annealed, 99.97%
铼, wire reel, 0.5m, diameter 0.10mm, annealed, 99.97%
铼, wire reel, 0.5m, diameter 0.125mm, annealed, 99.97%
铼, wire reel, 0.5m, diameter 0.15mm, annealed, 99.97%
铼, wire reel, 0.5m, diameter 0.178mm, annealed, 99.97%
铼, wire reel, 0.5m, diameter 0.5mm, annealed, 99.97%
铼, wire reel, 1m, diameter 0.076mm, annealed, 99.97%
铼, wire reel, 1m, diameter 0.10mm, annealed, 99.97%