Dating adequate


31-Oct-2017 22:39

Unfortunately, it is not possible to achieve this precision for the majority of art objects.Among the reasons for this is the small amount of material that may be taken for testing.Some clays are hardly thermoluminescent at all; some may not have a straight-line relationship between dose and TL; spurious luminescence due to chemical or pressure effects may mask the radiation-induced TL; occasionally, a condition called "anomalous fading", where part of the TL is unstable, may lessen the accuracy of the dose measurement.Generally speaking, when a sample is drilled and there is no information available about the burial environment, one may expect up to 40 per cent uncertainty.

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Finally, one has to make the measurements regardless of whether the TL of the clay is well-behaved or not.Drilling, the usual method of sampling, introduces some uncertainty.It is also rare that any information about the radiation from the burial soil can be obtained, as art objects are usually thoroughly cleaned.Some of these are quite easy to detect; some quite difficult.

For example figures, normally modeled, may be carved out of brick or assembled out of fragments.A leaflet from Daybreak describing the TL technique in more detail and giving a bibliography will be provided to interested persons.



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