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OSL has two major variants: the infrared stimulated luminescence (IRSL) and the blue light stimulated luminescence (BLSL). (1998) – The late Pleistocene loess deposits of eastern Belgium: new TL age determinations.

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Optically stimulated luminescence is a method of determining the age of burial of quartz or feldspar bearing sediments based upon principles of radiation and excitation within crystal lattices, and stems from the fact that imperfections in a crystal lattice have the ability to store ionizing energy (Radiation is absorbed by the crystal lattice upon sediment burial, and over time, excites electrons causing them to migrate within the crystal and become stored in traps resulting from crystal lattice defects.The luminescence-dating laboratory was installed in 1993 as a collaboration between the Laboratory for Mineralogy and Petrology (Geological Institute) and the Laboratory of Analytical Chemistry (Institute for Nuclear Sciences, INW). When they are exposed to sunlight during transportation in the air the latent luminescence signal in the quartz and feldspar grains is bleached down to a negligible level and the luminescence "clock" is set to zero. The light signal is a measure of the radiation dose that has accumulated in these minerals through time.Thank you for visting the Utah State University Luminescence Laboratory homepage! We currently have two RISO TL/OSL Readers and one with a single-grain attachment.We specialize in the analysis of the optically stimulated luminescence (OSL) signals from quartz sand grains in geomorphological and geoarchaeological applications.

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