Dating two ancient samples by thermoluminescence method and the effect of the plateau region on the age of the samples

One of the methods of dating ancient artifacts, especially pottery, clay, bricks, and all objects that are baked at 450 degrees Celsius, with any color and glaze, is the use of thermoluminescence methods. In these methods, the basis of dating is quartz and feldspar minerals, which have dosimetric properties. The last time the sample was heated to a temperature of 450°C is considered as the zero time of the sample, and the chronometer starts working after this moment, and in fact, the age of the sample is the length of time that has passed since the mentioned moment. According to radiocarbon dating, one of the samples is approximately 8000 years old and the other is 2000 years old. In both methods, the amount of dose accumulated in the sample after the last heating of the sample is calculated and then compared with the annual dose of the sample in the region, and the plateau test is used to determine the appropriate temperature range for TL. According to the Plateau test, the suitable temperature range for the two samples is completely different, and the sample that has a longer life has a stable temperature range at more temperatures than the sample with a shorter life. In this article, the plateau area for the sample with the age of 9303 starts from the temperature of 388°C and for the sample with the age of 2295 from the temperature of 341°C, which shows the relationship between the age of the sample and the plateau area.