Optically stimulated luminescence dating methods
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Luminescence describes the emission of light from insulating solids, independent of black body radiation produced in the course of heating. Luminescence for example can be caused by chemical reactions, mechanical energy so-called triboluminescence or by ionising radiation. If the luminescence is caused by irradiation and ceases immediately after the radiation source has vanished, it is known as fluorescence. If the luminescence continues after the irradiation has stopped, it is known as phosphorescence.
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Optically Stimulated Luminescence
Optically Stimulated Luminescence | Field Journal | Desert Archaeology
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Dating mortar by optically stimulated luminescence: A feasibility study
Optically stimulated luminescence OSL dosimetry involves the illumination of an irradiated sample on an appropriate material to produce a stimulated emission of light, whose intensity is indicative of the radiation dose. This technique is currently used for personnel dosimetry, environmental dosimetry, and geological dating applications. The OSL signal responses to seven excitation wavelengths from nm to nm for each material were measured at 12 time periods post-irradiation from 6 h to d. The magnitude and fading characteristics of the OSL response of each material were then analyzed. In addition, it was found that the fading rates of OSL signals depend on the excitation wavelength used to elicit the signals and that these fading rates and the corresponding excitation wavelengths correlate well with the material's TL behavior.