Investigation of Cu2+ impurity effect on thermoluminescence

Thermoluminescence TL materials LiF (Mg،Cu2+) and LiF (Cu2+) were produced in powder. Their 3D emission spectra were investigated and compared to the commercially available LiF (Mg،Cu2+،P) and (LiF(Mg،Ti) TL materials. Emission spectrum of LiF (Mg،Cu2+) represents a peak maximum at 450 nm with a wide shoulder ranging from 520 nm to infrared area. Emission peak of LiF (Cu2+) is situated at 380 nm and its tail also is stretched to infrared. The temperature rates of main peak in glow curves for LiF (Mg،Cu2+) and LiF (Cu2+) lie at 200 °C and 250°C، respectively. Based on the obtained results، Cu impurity in LiF (Mg،Cu،P) has a major role in removing emission frequencies which are higher than 500 nm and also UV sensitivity.