Fading prediction in thermoluminescent materials using computerised glow curve deconvolution (CGCD)

The fading of three different thermoluminescent (TL) materials, CaF2 : Tm (TLD-300), manocrystalline LiF : Mg,Ti (DTG-4) and MgB4O7 : Dy,Na has been studied at room temperature and at 50°C of storage. The evolution as a function of the elapsed time of the whole glow curve as well as of the individual peaks has been analysed using the Computerised Glow Curve Deconvolution (CGCD) program developed at the NTHU. The analysis allows to predict the loss of the dosimetric information and to make any correction is necessary for using the TL dosimeters in practical applications. Furthermore, it is well demonstrated that using CGCD it is not necessary to anneal the peaks having a rapid fading to avoid, then, any interfering effect on the more stable peaks.