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Define luminescence dating archaeological dating methods

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Different materials vary considerably in their suitability for the technique, depending on several factors.

Heating these crystals (such as when a pottery vessel is fired or when rocks are heated) empties the stored energy, after which time the mineral begins absorbing energy again.

It uses various methods to stimulate and measure luminescence It includes techniques such as optically stimulated luminescence (OSL), infrared stimulated luminescence (IRSL), and thermoluminescence (TL).

"Optical dating" typically refers to OSL and IRSL, but not TL.

Thermoluminescence (TL) dating is the determination, by means of measuring the accumulated radiation dose, of the time elapsed since material containing crystalline minerals was either heated (lava, ceramics) or exposed to sunlight (sediments).

As a crystalline material is heated during measurements the process of thermoluminescence starts.

(Chemistry) phosphorescence of certain materials or objects as a result of heating.

It is caused by pre-irradiation of the material inducing defects which are removed by the heat, the energy released appearing as light: used in archaeological dating Redwares from Gubbacka's medieval village: regional and inter-regional views on ceramic networks and technology (SEM-EDS)/Punased savinoud keskaegsest Gubbackast: hinnanguid kohalikule ja mittekohalikule keraamikavorgustikule ning tehnoloogiale (SEM-EDS-analuusi pohjal) and its applications, recent advances and opportunities in thermoluminescent dosimeter (TLD) materials, luminescence dating: the basic approach to geochronology, the elastico-mechanoluminescence of thermoluminescent crystals, thermoluminescent phosphors for radiation dosimetry, using the optically stimulated luminescence (OSL) and Nigeria: Nok has more wonders yet for the world: Nok terracotta artwork dating back to 1500 BC, which was discovered in modern-day central Nigeria in the 1940s by a British archaeologist, is now famous the world over. Current research by German archaeological teams on Nok sites covering 240 sq kms northeast of the capital Abuja.

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source Fluorescence and Phosphorescence -- Prof.

He proposes the general name luminescence for evolutions of light which do not depend on the temperature of the substance concerned.

Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating.

It is useful to geologists and archaeologists who want to know when such an event occurred.