Abstract
The glow curve characteristics of single crystal LiF:Mg,Ti, grown by the Bridgman method were studied as a function of Ti concentration (3-14 ppm Ti). The glow curves were deconvoluted into component glow peaks using mixed order model kinetics. The TL sensitivities and activation energies of the glow peaks were studied in both post-irradiation annealed and unannealed samples. In glow curves following a 165(C/15 min anneal to remove peaks 2-4, the activation energy of peak 5 was observed to increase from 1.65 ± 0.1 eV at the lowest Ti concentrations, to 1.9 ± 0.1 eV from 8-14 ppm Ti concentration. The unique behaviour of peak 5 is interpreted as additional evidence indicating that peak 5 arises from a complex TC/LC spatially correlated defect structure, Mg trimers coupled to Ti, and that the Ti ions perturb the TC, thereby leading to a change in the activation energy.
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