Paramêtros cinéticos do pico termoluminescente em 215ºC do espodumênio lilás

The use of thermoluminescence (TL) in radiation dosimetry or geological dating requires knowledge of  the TL properties of the material. Besides the necessary care during the experiments, it is vitally  important knowledge of the curve shape of the emission and the answer depending on dose, that can be  presented as a theoretical model able to predict results and also provide explanations in terms of the  material internal structure and provides the lifetime of the same. This lifetime is indirectly calculated  using the kinetics activation energy (E), the frequency factor (s) and kinetic order (b). With this aim, the kinetic parameters of the 215°C TL peak from a lilac spodumene sample were  evaluated using the peak shape method, as well as the curve fitting. The b value found indicates that this  TL peak has a first order kinetic and the values of E and s derived from both methods under study showed  a lifetime of about 2 months when the material is subjected to a environment temperature of 15°C.