Development of small particle speciation for nuclear forensics by soft X-ray scanning transmission spectromicroscopy
| Autor: | David K. Shuh, Joseph I. Pacold, Kiel Holliday, K. B. Knight, M. J. Kristo, Tolek Tyliszczak, Corwin H. Booth, Stefan G. Minasian, Alison B. Altman |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nuclear forensics Synchrotron radiation Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Analytical Chemistry Chemical state Data acquisition Beamline Transmission (telecommunications) Microscopy Electrochemistry Environmental Chemistry Sample preparation 0210 nano-technology Spectroscopy |
| Zdroj: | The Analyst. 143(6) |
| ISSN: | 1364-5528 |
| Popis: | Synchrotron radiation spectromicroscopy provides a combination of submicron spatial resolution and chemical sensitivity that is well-suited to analysis of heterogeneous nuclear materials. The chemical and physical characteristics determined by scanning transmission X-ray microscopy (STXM) are complementary to information obtained from standard radiochemical analysis methods. In addition, microscopic quantities of radioactive material can be characterized rapidly by STXM with minimal sample handling and intrusion, especially in the case of particulate materials. The STXM can accommodate a diverse range of samples including wet materials, complex mixtures, and small quantities of material contained in a larger matrix. In these cases, the inventory of species present in a sample is likely to carry information on its process history; STXM has the demonstrated capability to identify contaminants and sample matrices. Operating in the soft X-ray regime provides particular sensitivity to the chemical state of specimens containing low-Z materials, via the K-edges of light elements. Here, recent developments in forensics-themed spectromicroscopy, sample preparation, and data acquisition methods at the Molecular Environmental Science Beamline 11.0.2 of the Advanced Light Source are described. Results from several initial studies are presented, demonstrating the capability to identify the distribution of the species present in heterogeneous uranium-bearing materials. Future opportunities for STXM forensic studies and potential methodology development are discussed. |
| Databáze: | OpenAIRE |
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