Optically stimulated luminescence dating wiki

Posted by / 28-Nov-2019 08:18

Optically stimulated luminescence dating wiki

It's an important, and relatively cheap tool for anthropology and paleontology.A good, clear graphic on the European Geosciences Union web pages explains how it works in general terms (link: https://eu/divisions/cl/tag/optically-stimulated-luminescence/).Does the heat/light knock loose a neighboring electron or two, making the negatively-charged defect a positively-charged defect? Or am I missing something else that's very obvious. I'm a geology teacher, and the more I teach, the more I realize I don't know.

Detailed information on how Wiley uses cookies can be found in our Privacy Policy.Optically-Stimulated Luminescence is a late Quaternary dating technique used to date the last time quartz sediment was exposed to light.As sediment is transported by wind, water, or ice, it is exposed to sunlight and zeroed of any previous luminescence signal.Until now we were only talking about perfect crystals. There might be an atom missing, there might be an additional one. These defects not only stand out in the spatial structure but also in the electronic. Some are usually occupied, others are usually empty. What's happening during OSL is that an electron spatially trapped in one of these localized states is excited by light into an empty band and can now move around the crystal and find an equally trapped hole.

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The electron that was trapped acquires enough energy to leave the positively-charged defect in the lattice it had lived in for (some long period of time).