Abstract
In recent year there has been a wide spread application of thermoluminescence detector (TLD) for a personnel dosimeter.
Thermoluminescence is a complex process as it involves a trap center, a luminescence center and the transfer of a carrier from the trap center to the luminescence center by heating.
Therefore, for the majority of thermoluminescent phenomena there has been given little knowledge about the atomic nature of the trap and luminescence center and the sort of the carrier transfered between them.
In the case of LiF: Mg, moreover, there is a much better opportunity for the identifica-tion of the centers and the carrier because radiation effects on many pure alkali halide have been extensively studied. Since 1967, the effort to study the detailed nature of the centers and the carrier in LiF: Mg has been made by using optical absorption and bleaching methods. These researches are described here to be help to understand the basic thermoluminescent process and the role of another impurities in thermoluminescent materials is also refered.
As many kinds of thermoluminescent materials are now prepared, the characteristics and the example for applications of these materials are explained.
