Thermoluminescence dating limitations of statistics, references
Most excited electrons will soon recombine with lattice ions, but some will be trapped, storing part of the energy of the radiation in the form of trapped electric charge. As the material is heated, during measurements, thermoluminescencea weak light signal, is emitted, proportional to the radiation dose absorbed by the material.
Ultraviolet light emitted by the sample is detected for measurement. Horowitz, Bibliography Aitken, M.
Its use is now common in the authentication of old ceramic wares, for which it gives the approximate date of the last firing.
In the process of recombining with a lattice ion, they lose energy and emit photons light quantadetectable in the laboratory.
Often the gamma radiation field at the position of the sample material is measured, or it may be calculated from the alpha radioactivity and potassium content of the sample environment, and the cosmic ray dose is added in.
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Most excited electrons will soon recombine with lattice ions, but some will be trapped, storing part of the energy of the radiation in the form of trapped electric charge Figure 1. In the laboratory, the accumulated radiation dose can be measured, but this by itself is insufficient to determine the time since the zeroing event.
Where there is a dip a so-called " electron trap"a free electron may be attracted and trapped. Functionality[ edit ] Natural crystalline materials contain imperfections:
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