Thermal luminescence dating updating drivers on dell dimension 4550
In 1985, they also developed optically stimulated luminescence dating techniques, which use laser light, to date sediments.The microscopic structure of some minerals and ceramics trap nuclear radioactive energy.Usually the electrons will reconnect with the molecules, but some will not.The electrons that dont reconnect eventually encounter imperfections in the microscopic structure of the ceramics or minerals, and they become trapped by these imperfections.
By heating the ceramic or mineral to above 500 degrees Celcius, these trapped electrons are released, creating a flash of light called thermoluminescence.
The sample is taken by introducing the tube into a freshly cleaned back surface; if this proves difficult a block may be cut from the unit of interest.
The specimen tube or block should then be wrapped in black plastic to prevent further exposure to light and to preserve the environmental moisture content.
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.
Prior to the final depositional episode it is necessary that any previously acquired TL is removed by exposure to sunlight.