The analysis of thermoluminescent glow peaks in LiF (TLD-100)

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Abstract
Three different methods have been used to determine the trap depth E and frequency factor S associated with glow peaks 2 to 5 in single crystals of LiF (TLD-100). The methods used were (i) the total glow peak method, (ii) the variable heating rate method and (iii) the isothermal decay method. Good agreement is found for the values of the trap parameters determined by the three methods. The peaks obey simple first-order kinetics for the thermal untrapping of electrons, following the model of Randall and Wilkins (1945). The average E values determined for peaks 2 to 5 are 1.10, 1.22, 1.60 and 2.06 eV with S values of 2*1013, 4*1013, 3*1016 and 5*1020 s-1 respectively. The results are compared with the widely differing values reported by other authors.