Luminescence dating method
In order to relate the luminescence given off by the sample to an age, we first need to obtain the dose equivalent to the burial dose.
Following the single-aliquot regenerative (SAR) method of Murray and Wintle (2000), the dose equivalent (De) is calculated by first measuring the natural luminescence of a sample.
post 1700 AD, early Iron Age contexts, late glacial timescales) and when the relationship between the organic materials and the archaeological context is uncertain.
The particular advantage of luminescence dating is that the method provides a date for the archaeological artefact or deposit itself, rather than for organic material in assumed association.
Optically-Stimulated Luminescence is a late Quaternary dating technique used to date the last time quartz sediment was exposed to light.The typical range for burnt stone or sediment is from about 100 to 300,000 years.The error limits on the dates obtained are typically in the range of 5 to 10%.The present contribution deals with the history of luminescence dating from the first observations of the luminescence phenomenon via the first proposal to use it for dating purposes, and the first dating application to the present wide field of applications in archaeology, Quaternary geology, geomorphology and geoarchaeology.
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.In the case of OSL sediment dating, suitable material (sand or silt-sized grains of quartz and feldspar) is usually available ubiquitously throughout the site.