Properties of milligram size samples prepared for AMS 14C dating at ETH |
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Authors: | Georges Bonani Richard Balzer Hans-Jakob Hofmann Elvezio Morenzoni Marzio Nessi Martin Suter Willy Wölfli |
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Affiliation: | Institut für Mittelenergiephysik, ETH-Hönggerberg, CH-8093 Zurich, Switzerland |
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Abstract: | We have investigated the ion beam characteristics (intensities, yields, duration and stability) of a variety of targets prepared for radiocarbon dating by AMS. The target preparation techniques include: organic matter pyrolysis products mixed with silver, high pressure temperature ‘graphites’, CO reduction by cracking, magnesium reduction of CO2 and direct dating of extractives. Values for minimum sample amounts, sample preparation times, contamination as judged by background and precision of determination are given and the overall performance is evaluated. |
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