The preparation of uranium-adsorbed silica particles as a reference material for the fission track analysis

Park, Y.J.; Lee, M.H.; Pyo, Hyung Yeol; Kim, H.A.; Sohn, Se Chul; Jee, Kwang Yong; Kim, W.H.

doi:10.1016/j.nima.2005.01.312

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…The particle production consists of several steps: aerosol-generation, aerosol drying, heat treatment for particle formation, and finally, particle collection (see Figure for a schematic overview of the setup). The method of spray pyrolysis for particle production is similar to previously reported approaches to production of particle standards. ,− In the setup at Forschungszentrum Jülich, a monodisperse aerosol is generated using a vibrating aerosol generator (VOAG, Model 3450, TSI Inc., U.S.A.). The vibrating orifice generates droplets through perturbation of a liquid jet, droplets having a uniform diameter at a specific resonance frequency of the vibrating orifice.…”

Section: Experimental Sectionmentioning

confidence: 99%

Characterization of the Aerosol-Based Synthesis of Uranium Particles as a Potential Reference Material for Microanalytical Methods

et al. 2017

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A process for production of micrometer-sized particles composed of uranium oxide using aerosol spray pyrolysis is characterized with respect to the various production parameters. The aerosol is generated using a vibrating orifice aerosol generator providing monodisperse droplets, which are oxidized in a subsequent heat treatment. The final particles are characterized with microanalytical methods to determine size, shape, internal morphology, and chemical and structural properties in order to assess the suitability of the produced particles as a reference material for microanalytical methods, in particular, for mass spectrometry. It is demonstrated that physicochemical processes during particle formation and the heat treatment to chemically transform particles into an oxide strongly influence the particle shape and the internal morphology. Synchrotron μ-X-ray based techniques combined with μ-Raman spectroscopy have been applied to demonstrate that the obtained microparticles consist of a triuranium octoxide phase. Our studies demonstrate that the process is capable of delivering spherical particles with determined uniform size and elemental as well as chemical composition. The particles therefore represent a suitable base material to fulfill the homogeneity and stability requirements of a reference material for microanalytical methods applied in, for example, international safeguards or nuclear forensics.

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Section: Experimental Sectionmentioning

confidence: 99%

Characterization of the Aerosol-Based Synthesis of Uranium Particles as a Potential Reference Material for Microanalytical Methods

et al. 2017

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“…Since the results of these measurements often have important legal or political implications, the measurement capability is continuously evaluated as part of the quality management system of the IAEA. Over the years, several standard particles for method validation and instrument calibration have been developed [6][7][8][9][10][11][12]. However, these particles generally do not reproduce the morphology and composition of the particles that are collected at enrichment facilities.…”

Section: Introductionmentioning

confidence: 99%

Determination of fluorine in uranium oxyfluoride particles as an indicator of particle age

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et al. 2009

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Moreover, the isotopic composition of the particles can be customized by dissolving the appropriate uranium reference material. Other research groups have also succeeded in preparing standard uranium particles of excellent qualitỹ Stoffels et al, 1994;Tushingham, 1998;Park et al, 2005! However, these particles do not always reproduce the morphology and composition of the particles that are generally found on swipe samples taken at uranium enrichment plants.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Uranium Particles Produced by Hydrolysis of UF₆Using SEM and SIMS

et al. 2007

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Environmental sampling (ES) is a powerful technique used by safeguards inspectors of the International Atomic Energy Agency and the European Safeguards Office for the detection of undeclared nuclear activities. Since its implementation in the 1990s, ES has proven to be very sensitive and effective. Considering the consequences, the measurements should be carried out under a quality management programme. At the Institute for Reference Materials and Measurements, a new production method is under development for the preparation of reference uranium particles from well-certified UF6, allowing uranium particles with certified isotopic abundances to be prepared that are representative of those found in uranium enrichment facilities. Using an aerosol deposition chamber designed and built for the purpose, particles are formed by the hydrolysis of UF6 and their morphology and (isotopic) composition measured using SEM-EDX and SIMS. The SEM measurements show that by varying the relative humidity of the air in the reaction chamber, the morphology of the particles can be changed. By making a distribution map of the chemical composition of the particles, the relationship between fluorine and uranium as main constituents of the particle could be established. The presence of fluorine is a valuable indicator for the occurrence of nondeclared enrichment activities.

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The preparation of uranium-adsorbed silica particles as a reference material for the fission track analysis

Cited by 5 publications

References 19 publications

Characterization of the Aerosol-Based Synthesis of Uranium Particles as a Potential Reference Material for Microanalytical Methods

Characterization of the Aerosol-Based Synthesis of Uranium Particles as a Potential Reference Material for Microanalytical Methods

Determination of fluorine in uranium oxyfluoride particles as an indicator of particle age

Characterization of Uranium Particles Produced by Hydrolysis of UF₆Using SEM and SIMS

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The preparation of uranium-adsorbed silica particles as a reference material for the fission track analysis

Cited by 5 publications

References 19 publications

Characterization of the Aerosol-Based Synthesis of Uranium Particles as a Potential Reference Material for Microanalytical Methods

Characterization of the Aerosol-Based Synthesis of Uranium Particles as a Potential Reference Material for Microanalytical Methods

Determination of fluorine in uranium oxyfluoride particles as an indicator of particle age

Characterization of Uranium Particles Produced by Hydrolysis of UF6Using SEM and SIMS

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Product

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Characterization of Uranium Particles Produced by Hydrolysis of UF₆Using SEM and SIMS