Thermoluminescence dating pottery
Paleodose and the supralinearity correction factor were determined by analyzing the glow curve in the temperature range of 250 to 400Â°C and giving additive laboratory doses.
The ages of these four ceramic samples studied were 692 Â±62, 763 Â±38, 648 Â± Â±40 years which agree well with the historical data for the site.
This energy is lodged in the imperfect lattices of the mineral's crystals.
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.
Two forms of luminescence dating are used by archaeologists to date events in the past: thermoluminescence (TL) or thermally stimulated luminescence (TSL), which measures energy emitted after an object has been exposed to temperatures between 400 and 500°C; and optically stimulated luminescence (OSL), which measures energy emitted after an object has been exposed to daylight.
To put it simply, certain minerals (quartz, feldspar, and calcite), store energy from the sun at a known rate.
It is consistent with other evidence that the Terracotta Army figures were made about 2200 yr ago and that the site burned down soon afterwards.
Both the AMS radiocarbon technique and TL dating have been used to study the age of organic-tempered pottery from Gasya, one of the earliest Neolithic sites in the Russian Far East.