Mapping of rare earth elements in nuclear waste glass–ceramic using micro laser-induced breakdown spectroscopy |
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| Institution: | 1. ILM, UMR5306, Université Lyon 1 — CNRS, Université de Lyon, F-69622, Lyon, France;2. CEA, DEN, DTCD/SECM/LMPA-Marcoule, F-30207 Bagnols-sur-Cèze, France;1. Central European Institute of Technology, Brno University of Technology, Purkyňova 123, CZ-612 00 Brno, Czech Republic;2. Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic;3. AtomTrace s.r.o., Kolejní 9, 612 00 Brno, Czech Republic;4. Masaryk University, Faculty of Science, Institute of Geological Sciences, Kotlářská 2, 611 37 Brno, Czech Republic;5. Masaryk University, Faculty of Science, Department of Chemistry, Kamenice 735/5, 625 00 Brno, Czech Republic;6. Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Dosimetry and Application of Ionizing Radiation, Břehová 7, 115 19 Praha 1, Czech Republic;1. Applied and Laser Spectroscopy Laboratory, Institute of Chemistry of Organometallic Compounds, Research Area of National Research Council, Via G. Moruzzi, 1, 56124 Pisa, Italy;2. Department of Earth Sciences, University of Pisa, Via Santa Maria 53, Pisa, Italy;3. Laser and Plasma Research Institute, Shahid Beheshti University, G. C., Evin, Tehran 1983963113, Iran;4. Department of Archaeology, University of York, King''s Manor, YO17EP York, UK |
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| Abstract: | A micro-LIBS system was set up based on a quadruple Nd:YAG laser at 266 nm coupled with a microscope. Elemental mapping was performed on a Mo-rich glass–ceramic sample containing CaMoO4 crystallites hundreds of microns in length and about 25 μm in section diameter. The topography of single-shot laser-induced craters was characterized using an atomic force microscope (AFM), which revealed a crater size less than 7 μm. Mappings of Mo, Ca, Sr, Al, Fe, Zr and rare earth elements such as Eu, Nd, Pr and La were undertaken. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was conducted to validate the micro-LIBS analysis. Principal components analysis calculation was used to investigate the correlation of elements in the two phases of glass–ceramic. Correlation between Ca, Sr, rare earth elements and Mo indicates their preferential incorporation into the calcium molybdate crystalline phase. Anti-correlation between Fe, Zr, Al and Mo revealed their affinity to the glass phase. |
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