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Optically stimulated luminescence dating wiki

The possibility of making use of TL stored in a mineral or pottery sample was first proposed by chemist Farrington Daniels in the 1950s. Applications and limitations of thermoluminescence to date quaternary sediments. During the 1960s and 70s, the Oxford University Research Laboratory for Archaeology and History of Art led in the development of TL as a method of dating archaeological materials. The way you measure energy stored in an object that you expect has been exposed to heat or light in the past is to stimulate that object again and measure the amount of energy released.The energy released by stimulating the crystals is expressed in light (luminescence).When heated, this energy is released as a burst of light.The intensity of the light is proportional to the amount of energy, which in turn corresponds to the length of accumulation time.

Thermoluminescence, or TL, has been used since the 1950s to determine the approximated firing date of pottery and burnt silicate materials.Geologists have used OSL and TL to establish long, log chronologies of landscapes; luminescence dating is a powerful tool to help date sentiments dated to the Quaternary and much earlier periods. The potential of using thermoluminescence to date buried soils developed on colluvial and fluvial sediments from Utah and Colorado, U. Thermoluminescence was first clearly described in a paper presented to the Royal Society (of Britain) in 1663, by Robert Boyle, who described the effect in a diamond which had been warmed to body temperature. Single-grain dating of sediments also has the potential to address turbation processes.Luminescence dating (including thermoluminescence and optically stimulated luminescence) is a type of dating methodology that measures the amount of light emitted from energy stored in certain rock types and derived soils to obtain an absolute date for a specific event that occurred in the past.

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Luminescence dating dates crystalline materials, such as quartz or feldspar, to the last time they were exposed to sufficient heat or sunlight.