AN INTERNATIONAL COMPARISON STUDY ON OSL DATING
To compare our experiment results with other laboratories by participating in international inter-laboratory comparison tests is an important need to ensure the accuracy of our measurements. However, so far, international comparison tests or measurements on OSL dating are unfortunately organized very limited in number. The latest inter-laboratory comparison study was conducted between 2006 and 2012 years by the Nordic Luminescence Laboratory in Denmark. In this paper, within the scope of the aforementioned comparison study, the result of Optical Stimulated Luminescence (OSL) dating of inter- comparison sample based on quartz-rich aeolian and/or coastal marine sand sample was presented. Equivalent dose (De) of the sample was determined using Single Aliquot Regenerative Dose (SAR) protocol. For the calculation of annual dose rate (Da), concentrations of radioactive isotopes (U, Th, K) were measured by using a high-purity germanium detector. OSL age was determined as 4530 ± 41 years for the sample. Consequently, within the error limits, we have determined the age of the sample close to the expected age. By participating in this comparison test, we have had the opportunity to compare our results with other luminescence dating laboratories and to ensure the accuracy of our results. At the same time, we had the chance to interpret each step of our dating measurements (preparation of pure quartz minerals, determination of equivalent dose and annual dose etc.) on an international scale, separately.
Keywords:
OSL dating, interlaboratory comparison, equivalent dose, quartz sar,
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