Optically stimulated luminescence dating wiki

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.Electron holes are places where an electron could be, but aren't. Wiley Online Library requires cookies for authentication and use of other site features; therefore, cookies must be enabled to browse the site.Detailed information on how Wiley uses cookies can be found in our Privacy Policy.I understand what a positively- or negatively-charged defect in the lattice is.I understand that heating or light will give the trapped electron living in the positively-charged defect the energy to get up and go. But: I don't understand the processby which the negatively-charged lattice defectbecame positively-charged enoughto attract the electronthat just left the positively-charged lattice defect.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.

Second, where there used to be zero charge, there is now a charge because 0 (no charge) minus one negative charge (the electron) results in a positively charge spot (0 - -1 = 1).Cite Web id: 20060000896 Cite Web score: 1286 Wintle, Ann, Murray, A.S., (2006) 'A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols', Radiation Measurements 41(4) pp.369-391 RAE2008 The publication "A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols" is placed in the Top 10000 in category Other.They create possible states between bands at energies that are usually forbidden and THESE STATES ARE LOCALIZED. If this happens they recombine (the electron "falls" into the lower state) and emit a photon according to the energy difference. OSL is an acronym for Optically-Stimulated Luminescence.

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