Production of Graphite Targets by Deposition from CO/H2for Precision Accelerator14C Measurements
- 1 January 1986
- journal article
- Published by Cambridge University Press (CUP) in Radiocarbon
- Vol. 28 (2A), 191-197
- https://doi.org/10.1017/s0033822200007268
Abstract
A method has been developed at the Arizona AMS facility for production of graphite directly from CO2by catalytic reduction of CO/H2mixtures. The method is a modification of procedures discussed by Vogelet al(1984). Currents of12C−from these targets vary considerably, but have a median value which is 70% of that achieved from spectroscopic graphite. Precisions of ±60 to 100 yr are routinely achieved for14C ages of 5000-yr-old samples containing one milligram of carbon. The yield of14C from “blank” targets is 0.6 ± 0.1% of that from modern material.Keywords
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