The thermoluminescence of pure and doped crystals was measured following irradiation with γ- and X-rays at ambient temperatures. The factors investigated included the effects of dopants (Mg, Mg/Ti, Fe) and dose. The results were compared with optical absorption and photoluminescence measurements, made previously on the same crystals. The role played by F, F3+, Z2 and colloids in the emission process was considered. Some new effects were reported. These included step-like features in the glow curves at large doses. The latter were explained in terms of the clustering of interstitial defects formed during radiolysis.

Defect Clusters and Thermoluminescence in LiF Crystals. A.T.Davidson, A.G.Kozakiewicz, D.J.Wilkinson, J.D.Comins: Journal of Applied Physics, 1999, 86[3], 1410-4