Qnat(Gy) T(age) = I(Gy/year)
The implementation of the method Thermoluminescence dating based on the study of natural radioactivity and the ability of crystals contained in a previously heated object (ceramics, quartz pebbles, flint...) To accumulate the effects of irradiation. To determine the TL age, it is therefore imperative : - Measuring the dose of natural background radiation (Qnat) received from a time zero (the last heating of the material). This approach requires the establishment of protocols thermoluminescence complex and lengthy, to ensure reliability of results. There is a need for a large number of experiments (around 200 curves from TL). - Determine the annual dose of radiation (I) received by the crystals. It covers the contribution of the object itself and its environment. It requires measures of radioactivity in situ and laboratory analysis of the radiochemical composition of the artifact to date, and samples of the middle of immediate burial. It is the ratio of these two quantities gives the age between the last heating of the object and its study in the lab: CIRAM is the only private laboratory to carry out real thermoluminescence dating, in compliance with the methodological procedures developed in university.
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