A rapid isotope ratio analysis protocol for nuclear solid materials using nano-second laser-ablation time-of-flight ICP-MS |
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Authors: | S Bürger LR Riciputi |
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Institution: | 1. Chemical & Isotope Mass Spectrometry Group, Transuranium Research Institute, Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6375, USA;2. Department of Energy, New Brunswick Laboratory, 9800 South Cass Avenue, Bldg 350, Argonne, IL 60439, USA;3. Nuclear & Radiochemistry Group, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA |
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Abstract: | The analysis of the isotopic composition of nuclear or non-nuclear solid materials is performed in a variety of fields, e.g., for quality assurance in the production of nuclear fuels, as signatures in forensics, nuclear safeguards, and non-proliferation control, in material characterization, geology, and archeology. We have investigated the capability of laser ablation (New Wave Research, 213 nm) coupled to time-of-flight (TOF) ICP-MS (GBC OptiMass 8000) as a rapid analytical protocol for multi-isotope screening of nuclear and non-nuclear solid samples. This includes natural and non-natural isotopic compositions for elements including Cu, Zr, Mo, Cd, In, Ba, Ta, W, Re, Pt, Pb, and U, in pure metals, alloys, and glasses. Without correcting for mass bias (mass fractionation), an overall precision and accuracy of about 4% (1σ) can be achieved by minimizing the deposited laser power and thus fractionation (mass removal based on thermal properties). The precision and accuracy in combination with literally no or minimized sample preparation enables a rapid isotope screening of solid samples that is of particular interest to support nuclear forensic and safeguard analysis. |
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Keywords: | Nano-second laser-ablation Time-of-flight ICP-MS Solid samples Rapid isotope screening Isotope ratio analysis Nuclear forensic analysis Nuclear safeguard analysis |
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