Preparation of the particles containing isotope reference uranium for the determination of the low abundant U isotope ratios

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

KEK Proceedings 2022-2, p.154 - 158, 2022/11

Precise determination of minor U isotopes (U and U) of particles from the safeguard environmental samples is powerful method for detecting the undeclared nuclear activities. In this study, preparation method of U particle was examined to utilize for the minor U isotope determination. The porous silica particles were used as the particle matrix and lutetium was mixed to the impregnation solution as U impregnation indicator for the particle picking. The result of the Scanning Electron Microscope indicated that the contacting the solution with Si particles overnight gently could produce the impregnated particles effectively rather than the mixing them with PFA stick.

PNC Technical Review No.104

PNC TN1340 97-004, 170 Pages, 1997/12

PNC-TN1340-97-004.pdf:26.83MB

no abstracts in English

None

PNC TJ1621 94-001, 111 Pages, 1994/03

PNC-TJ1621-94-001.pdf:3.27MB

no abstracts in English

Study on the behavior of radioactive nuclides in near field

PNC TJ1533 94-001, 157 Pages, 1994/03

PNC-TJ1533-94-001.pdf:7.37MB

None

None

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PNC TN8410 90-030, 143 Pages, 1990/03

PNC-TN8410-90-030.pdf:2.63MB

None

None

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PNC TN8410 90-032, 139 Pages, 1990/02

PNC-TN8410-90-032.pdf:2.5MB

None

Isotopic analysis of uranium by optical spectral method; Feedback stabilized tandem Fabry-perot interferometer

; *; *

Bunko Kenkyu, 35(4), p.309 - 321, 1986/00

https://doi.org/10.5111/bunkou.35.309

no abstracts in English

An Improvement in Isotopic Ratio Measurement of Uranium

; ; ;

Shitsuryo Bunseki, 18(4), p.1270 - 1274, 1970/00

https://doi.org/10.5702/massspec1953.18.1270

no abstracts in English

The Determination of uranium ratios in individual environmental particles

Tomita, Ryohei; Esaka, Fumitaka; Miyamoto, Yutaka

no journal, , 

In the previous study, we developed a combination method of particle manipulation and secondary ion mass spectrometry (SIMS) for removing the interferences from other elements in other particles. Since the particles were selected randomly and manipulated, it caused the problem not to cover the range of U/U isotope ratio in the sample. In this study, we improved the procedure of analyzing uranium isotope ratios in individual particles by SIMS to cover the range of U/U in the sample.

Development of the uranium isotope ratio analysis for a single uranium particle by MC-ICP-MS using synthetic uranium particles

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

no journal, , 

The impact of the uranium from the process blank for a single uranium particle analysis by MC-ICP-MS was evaluated quantitatively. The synthetic uranium particles prepared by impregnating of U (NBL CRM U100) to porous silica were used in this study. A conical-bottom bottle was used to dissolve a uranium particle with a small amount of acid. The amount of U and U/U of the process blank were 0.2 pg and 0.0190, respectively. This ratio was similar to that of CRM U015 (0.0155), which was used for the detector calibration of MC-ICP-MS, indicating that the process blank was derived from ultra-trace level of uranium remining in the desolvator. The analytical results indicated that the U/U ratio could be determined accurately by MC-ICP-MS when the particle contained more than 23 pg of U.