Abstract
Proton induced X-ray emission (PIXE) techniques have been used to estimate the concentrations of trace quantities of thorium and uranium in pelletised powdered rock and ore samples. A variety of naturally occurring ores with uranium and thorium concentrations in the range 10–10 000 μg g −1 have been studied. The lower level detection limit with no adjacent element interference was 3–4 μg g −1 per 100 μC. To verify the PIXE technique for thorium and uranium determination, the same batch of samples was measured by delayed neutron activation for uranium concentrations, and neutron activation analysis for thorium concentrations. They were in excellent agreement.
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