Thermoluminescence dating definition

The heating must have taken the object above 500° C, which covers most ceramics, although very high-fired porcelain creates other difficulties.

It will often work well with stones that have been heated by fire.

Two forms of luminescence dating are used by archaeologists to date events in the past: thermoluminescence (TL) or thermally stimulated luminescence (TSL), which measures energy emitted after an object has been exposed to temperatures between 400 and 500°C; and optically stimulated luminescence (OSL), which measures energy emitted after an object has been exposed to daylight.

thermoluminescence dating definition-22

is bound to unearth yet more wonders from the Nok world.

phosphorescence of certain materials or objects as a result of heating.

An age determination technique in which the amount of light energy released in a pottery sample during heating gives a measure of the time elapsed since the material was last heated to a critical temperature.

The older a piece of pottery, the more light produced.

(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.

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 Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co.

Thermoluminescence dating (TL) 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).

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In all, close to two dozen physical quantities must be accurately measured to establish the relationship between doses of different kinds of radiation and light output, and to compute dose rate.

TL dating is a matter of comparing the energy stored in a crystal to what "ought" to be there, thereby coming up with a date-of-last-heated.

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