Optically stimulated luminescence dating laboratory

the emission of a characteristic colour of light) when stimulated.

It is concluded that the SAR procedure has proved to be a very powerful approach for determining the equivalent dose using quartz OSL signals dominated by the fast component.

The presence of other components complicates the simplest protocols and further quantification of their behaviour is required.

Luminescence dating is an absolute radiometric method of determining the age of a material since a key event in its history - typically burial (in the case of sediments) or firing (in the case of ceramics or burnt stone).

Different single-aliquot regenerative-dose (SAR) protocols have now been applied for some years to quartz grains for determining the equivalent dose, in both dating and retrospective dosimetry studies.

This paper begins by laying out the basic principles of the SAR procedure on which the various SAR protocols are based.

A general model is examined and three simple performance tests are laid out.Recent experimental characterisation of the optically stimulated luminescence signals from quartz grains is reviewed, giving particular regard to implications for SAR protocols.When a geological sediment is buried, the effects of the incoming solar radiation are removed.With this bleaching effect removed, the influence, albeit often weak, of naturally-occurring radioactive elements (primarily potassium-40, uranium and thorium) within the sediment together with incoming cosmic rays results in the accumulation of a signal within individual mineral grains (most commonly quartz and feldspars).It is this signal that is the key to luminescence dating techniques.Given an estimate of the rate of received ionizing radiation (the dose rate, or D), and knowing the total accumulated dose (the palaeodose; designated D This accumulated signal results in luminescence (i.e.

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