Start Luminescence dating method

Luminescence dating method

We are also able to conduct sample collection outside of the UK if the client is willing to cover additional transport, accommodation and subsistence costs.

The now charge-deficient ion that contributed the trapped charge becomes a luminescence center L Recombination: Electrons trapped in deep traps T do not readily recombine unless induced to do so by natural "clock-resetting events", or under strictly controlled laboratory conditions.

Heat or light can eject charges from traps T back into the conduction band.

By extrapolating the growth curve until it intersects the initial natural intensity of the sample, the dose accumulated since the initializing event can be found.

Multiple aliquot (disc containing fraction of sample), single aliquot are the two major methods that are used commonly.

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.

Fault gouges, and stalagmites are other important materials that can be dated with this technique.

Archaeological potteries, while they are also datable by luminescence, are not often useful in archaeological applications, since their typology is usually a more precise indicator of age.

The amount of uranium and thorium are measured with the help of Alpha counters using Zn S coated screens whereas potassium is measured by Gamma counters or by using chemical analytical methods.

The palaeodose is evaluated by comparing the natural luminescence intensity of the sample with the increase of luminescence signal output induced by known amounts of additional radiation.

Likewise, projects central to the Laboratory's research interests may be carried out at a reduced charge.