What is thermoluminescence dating used for
Create fake pottery that will pass the thermoluminescence test One way to pass a fake through a TL test is to expose the newly-made pottery to a high dose of artificial radiation sources, thus fooling the measurement instruments.However, producing fakes with this method calls for expertise on the subject, as well as expensive instruments.For instance, it is possible to date the wood support of a panel as well as canvas.The three most important dating techniques which are useful for the analysis of works of art are: Thermoluminescence (TL), Dendrochronology (DC), and Carbon 14 (C15). It dates items between the years 300-10,000 BP (before present).This usually occurs when the items are heated to 350 degrees Celsius.Therefore, in archaeology, thermoluminescence dating works best for ceramics, cooking hearths, incidentally fire-cracked rocks, and deliberately fire-treated rocks, such as flint or chert.A sample of the earth also needs to be collected so environmental radiation can be tested.The wetness of the soil and the sample should also be recorded.
Generally, for example, we can’t establish when a vermilion stroke was brushed onto a painting, but we can date most of the materials that the pigments are painted on.
The minerals that are used for thermoluminescence dating are mainly quartz and feldspar.
The last time a crystal was reheated and its electrons were released is known as a "clock resetting event".
Indeed, the figure shows an automatic instrumentation which allows measurement of thermoluminescence light from samples and also the determination of the dose rate per year.
This last procedure involves the use of a radioactive source, though very weak.When the object is heated to 350 degrees Celsius the trapped electrons are released and this is called a clock resetting event.