P.;the measured age of and imitation of Tang Sancai produced in Republic of China is 114 B. The above 11 Sancai samples of Luoyang Tang Dynasty were also measured by fine-grain mineral mixture technique.
However,only the age of one sample among 5 Tang Dynasty samples fell into Tang Dynasty age scope;the measured age of 5 modern imitations fell into the scope of last twenty years, showing good result.
By comparing this light output with that produced by known doses of radiation, the amount of radiation absorbed by the material may be found.
It is also rare that any information about the radiation from the burial soil can be obtained, as art objects are usually thoroughly cleaned.
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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.
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. The age of the pottery, in principle, may then be determined by the relation Age = Accumulated dose / Dose per year Although conceptually straightforward, TL has proven to to be far from simple in practice.