10Be Analyses with a Compact AMS Facility—Are BeF2 Samples the Solution?
accelerator mass spectroscopy
alkaline earth metals
Be 10 Be 9
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CitationWacker, L., Grajcar, M., Ivy-Ochs, S., Kubik, P. W., & Suter, M. (2004). 10Be analyses with a compact AMS facility—are BeF2 samples the solution?. Radiocarbon, 46(1), 83-88.
DescriptionFrom the 18th International Radiocarbon Conference held in Wellington, New Zealand, September 1-5, 2003.
AbstractThe injection of 10BeFinstead of10BeOinto a compact accelerator mass spectrometry system with a terminal voltage of 0.58 MV was investigated, because BFmolecules are unstable and isobaric interference of 10B with 10Be can thus be significantly reduced. We describe the method we developed to prepare BeF2samples. 10Be was measured in a segmented gas ionization detector. Separation of 10Be from 10B could be achieved both for ions in the 1+ charge state with an energy of 0.8 MeV and in the 2+ charge state with an energy of 1.4 MeV. The 2+ ions are better separated, whereas the 1+ charge state has a higher transmission. 10Be/9Be ratios (approximately 10^-12) in a suite of rock samples were successfully determined for exposure dating in either charge state and compared with measurements made on the 6MV tandem.