Abstract
The determination of Uranium (U) and Thorium (Th) by thick source alpha counting (TSAC) using ZnS(Ag) and the pairs technique, has been made in a variety of archaeological and geoarchaeological materials (slags, ores, clays, granites, limestones, sandstones) and Standards in powder form. Particular attention is drawn to calibration issues for uranium and thorium concentration values. The calibration factors chosen per rock type of material counted compared to the computed one from relevant equations are compared in the present applications.
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