A high pressure-high temperature press is used to make target material for accelerator mass spectrometry. Graphite was produced from typical 14C samples including oxalic acid and carbonates. Beam strength of 12C was generally adequate, but random radioactive contamination by 14C made age measurements impractical. ?? 1984.
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Graphite sample preparation for AMS in a high pressure and temperature press
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms