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Journal Articles

Sensitive $$^{236}$$U/$$^{238}$$U isotopic analysis of trace uranium in safeguards environmental samples using multicollector inductively coupled plasma mass spectrometry

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

Journal of the American Society for Mass Spectrometry, 35(6), p.1178 - 1183, 2024/05

https://doi.org/10.1021/jasms.4c00014
 Times Cited Count：0 Percentile：0.00(Biochemical Research Methods)

A sensitive analytical technique was investigated in order to determine 10$$^{-7}$$ order of $$^{236}$$U/$$^{238}$$U ratio in the sub-ng of uranium using a multi-collector ICP-MS. First, the solution volume was concentrated to one tenth to obtain higher intensities. Next, data acquisition was started from the beginning of the solution uptake and continued until all solution was exhausted. Taking advantage of multi-collector measurement, all data were used with excepting the portion affected by air mixing at the beginning and end of sample introduction. The isotope ratios were calculated from the total counts of each isotope. This technique was applied to U isotope standard (IRMM-184) to measure the 10$$^{-7}$$ order of $$^{236}$$U/$$^{238}$$U ratio in the sub-ng of uranium. Measured values were in good agreement with the certified value within the uncertainity ($$k$$=2). The uncertainties obtained with this new technique (32% on average) were revised to be 10 times smaller than those obtained with the conventionalmethod.

Journal Articles

Constraints on the dipole photon strength for the odd uranium isotopes

Moreno-Soto, J.*; Kimura, Atsushi; 130 of others*

Physical Review C, 105(2), p.024618_1 - 024618_14, 2022/02

https://doi.org/10.1103/PhysRevC.105.024618
 Times Cited Count：2 Percentile：32.42(Physics, Nuclear)

Oral presentation

Development of measurement method of $$^{236}$$U using ICP-MS/MS

Tanaka, Yasuyuki; Do, V. K.; Motoki, Yoshiaki*; Ota, Yuki; Iwahashi, Hiroyuki; Kurosawa, Kiyoko*; Furuse, Takahiro

no journal, , 

We examined the measurement method of $$^{236}$$U using triple-quadrupole inductively coupled plasma-mass spectrometry (ICP-MS/MS, Agilent 8900). The measurable mass to charge ratio (m/z) is expanded up to 275, the device can measure $$^{236}$$U$$^{16}$$O$$^{16}$$O (m/z = 268) generated by the reaction with $$^{16}$$O, which was used as a reaction gas. This mass shift mode decreased the interference from hydride of $$^{235}$$U compared to the previously reported analytical method, which improved limit of detection of $$^{236}$$U using ICP-MS/MS. In this presentation, the optimized measurement condition of $$^{236}$$U measured at m/z = 268 by ICP-MS/MS is reported.

Oral presentation

Overview and research finding of research group for safeguards analytical chemistry

Tomita, Jumpei; Tomita, Ryohei; Suzuki, Daisuke; Yasuda, Kenichiro

no journal, , 

no abstracts in English

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