Tecnologie per i Beni Culturali


THERMOLUMINESCENCE (TL)
Dating and the authenticity test

TL dating techniques in archaeology are based on the measure of electronic charges trapped in clay minerals as a consequence of the interaction of natural radioactivity and cosmic rays. They are specific for archaeological ceramics and bricks, and allow to determine the time elapsed since the firing in kiln.

They are destructive (needed amount of sample: several tens of grams) and can be applied only when information’s on excavation site or environment are available.

The result is reported in an expertise, where the object is briefly described and identified by a picture




                                                                       

The TL authenticity test, requiring only a few milligrams of sample, is instead able to answer the question: is a ceramic object truly old as it stylistically claims, or is it a modern imitation?
To solve the doubt, all the trapped charged, converted into light, are measured through heating. This amount is compared whit that expected for an object with same age and geographic provenance, ant authenticity is established or not.

 

 

 

 

 

 

 

 

 

 

The result is reported in an expertise, where the object is briefly described and identified by a picture