THERMOLUMINESCENCE OF LIF-CU2-DOSIMETRY( IN RADIATION)

Thermoluminescence of LiF:Cu2+ in the form of single crystals and poly crystalline powder has been studied after beta-irradiation. The featur es of the glow curves are studied in different samples as a function o f impurity concentration, material form and storage. The glow curve, c onsisting of a predominant peak at about 155 degrees C and of much wea ker peaks at higher temperatures, looks simpler than that of LIF:MS, C u, P. The sensitivity increases in the single crystals with increasing dopant concentration and is enhanced for samples in powder form. Line arity of the response to dose is observed for the main peak up to 100 Gy. Absence of fading is found at normal storage temperatures. No sign ificant loss of sensitivity appears after repeated use. Appreciable mo difications of the glow curve shape are caused by different kinds of i onizing radiations. All these results suggest the use of LiF:Cu2+ for dosimetric purposes.