Co-precipitated silver–metal oxide aggregates for accelerator mass spectrometry of 10Be and 26Al
| Autor: | Christian Obrist, Robert C. Finkel, L. Keith Fifield, M. Vonmoos, Marc W. Caffee, John O. Stone, Raimund Muscheler, Peter W. Kubik, Juerg Beer, Michal Grajcar |
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| Rok vydání: | 2004 |
| Předmět: |
Nuclear and High Energy Physics
Coprecipitation Analytical chemistry Oxide chemistry.chemical_element Mass spectrometry Grinding Matrix (chemical analysis) Metal chemistry.chemical_compound chemistry Chemical engineering Aluminium visual_art visual_art.visual_art_medium Sample preparation Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :272-277 |
| ISSN: | 0168-583X |
| Popis: | We have developed a chemical co-precipitation method for producing conductive Ag–BeO and Ag–Al 2 O 3 aggregates for 10 Be and 26 Al analyses. Co-precipitation offers a rapid alternative to grinding and mixing Be and Al oxides with Ag or Cu powder, and ensures that Al and Be oxide grains produced by baking are uniformly dispersed in the conductive Ag matrix. Co-precipitated aggregates are bulkier than pure oxides and require little or no grinding, hence samples containing significantly less than 250 μg of 9 Be can be manipulated and analysed, increasing the efficiency of 10 Be measurements. Binding BeO with Ag reduces the chance of hazardous BeO dust escaping during sample preparation. Although ion currents from co-precipitated Ag–BeO cathodes are lower than from mixed Nb–BeO, savings in preparation time may offset longer analysis times. |
| Databáze: | OpenAIRE |
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