Identification of uranium oxidation states using oxygen K-edge scanning transmission X-ray microscopy

IF 3.2 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Nuclear Materials Pub Date : 2025-05-01 Epub Date: 2025-03-18 DOI:10.1016/j.jnucmat.2025.155754

Rachel E. Lim , Alexander A. Baker , Alexander S. Ditter , S. Olivia Gunther , David K. Shuh , Jack M. Mayer , Matthew A. Marcus , Scott B. Donald , Brandon W. Chung

引用次数: 0

Abstract

The field of nuclear forensics is growing in importance, and the increasing capabilities at synchrotron radiation light sources enable non-destructive characterization of oxide particles with better spatial, compositional, and oxidation state speciation resolution than ever before. Uranium oxide particles derived from multiple wet chemical processing methods were examined using a scanning transmission X-ray microscope (STXM), and a weakly-supervised method was developed to automatically analyze the collected data. Multiple uranium oxidation states were observed and quantified within and between samples, yielding information about differences between particles produced via the various processing routes.

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用氧k边扫描透射x射线显微镜鉴定铀的氧化态

核取证领域正变得越来越重要，同步辐射光源的能力不断提高，使得氧化物颗粒的无损表征具有比以往更好的空间、成分和氧化态形态分辨率。采用扫描透射x射线显微镜（STXM）对多种湿法化学处理方法产生的氧化铀颗粒进行了检测，并开发了一种弱监督方法来自动分析收集的数据。在样品内部和样品之间观察和量化了多个铀氧化态，得出了通过不同加工路线产生的颗粒之间差异的信息。

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.