Dating romance in tl


28-Jan-2020 20:41

In order to relate the signal (the thermoluminescence—light produced when the material is heated) to the radiation dose that caused it, it is necessary to calibrate the material with known doses of radiation since the density of traps is highly variable.Thermoluminescence dating presupposes a "zeroing" event in the history of the material, either heating (in the case of pottery or lava) or exposure to sunlight (in the case of sediments), that removes the pre-existing trapped electrons.It will often work well with stones that have been heated by fire.

An example of this can be seen in Rink and Bartoll, 2005.

In the process of recombining with a lattice ion, they lose energy and emit photons (light quanta), detectable in the laboratory.

The amount of light produced is proportional to the number of trapped electrons that have been freed which is in turn proportional to the radiation dose accumulated.

In the laboratory, the accumulated radiation dose can be measured, but this by itself is insufficient to determine the time since the zeroing event.

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The Radiation Dose Rate - the dose accumulated per year-must be determined first.The sample material is illuminated with a very bright source of green or blue light (for quartz) or infrared light (for potassium feldspars).



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