Dating by thermoluminescence german guys dating
When scientists pull pottery from the ground, they use heat or lasers to de-excite these electrons out of their trap states back to their original state. Scientists measure the amount of light to get the total measured radiation dose (TMRD).
They divide this by an assumed radiation dose rate (RDR) to estimate the pottery’s age.
When we receive your sample we must first prepare it for measurement.
Powder samples (from pottery and bronze cores) are mixed with acetone and allowed to settle, so that fine grains, approximately 1/100mm. These grains are deposited and dried onto aluminium discs (for fine-grain analysis) or rhodium (for pre-dose analysis).
In the same way, more or less, OSL (optically stimulated luminescence) dating measures the last time an object was exposed to sunlight.Better still, unlike radiocarbon dating, the effect luminescence dating measures increases with time.As a result, there is no upper date limit set by the sensitivity of the method itself, although other factors may limit the method's feasibility.The older the pottery, the more radiation it has absorbed and the brighter the pottery sample glows.By measuring the TL, we can calculate how much radiation has been absorbed and use this information to calculate the approximate age of the pottery.