Abstract
Optically stimulated luminescence (OSL) is used to estimate the radiation dose derived from environmental radiation since the last heating event—the production of brick, tile, terracotta figures and ceramics in the archaeological site Karakorum, Mongolia. The dose distributions of some quartz samples showed a large scatter in the D e obtained using the initial OSL signal. Isolation of components by curve fitting procedure revealed that the characteristics of dose distribution depend on the variability of the ratio fast to medium components within the aliquots considered. Using the infrared stimulation at 220 ∘ C allowed depletion and the individual dose estimation of the medium OSL component, while the post-IR OSL gave less scatter in D e for the fast OSL component. Analytical tools such as D e ( t ) -plots, dose recovery tests and the component-resolved sensitivity changes aimed to identify and to diagnose the OSL signal composition, which can be used to estimate a correct mean D e value.
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