Thermal Activation Energies and Peak Temperatures in Thermoluminescence of LiF (Mg, Ti) and CaF2:Mn at Low Temperatures


Low temperature thermoluminescence (TL) ofl LiF (TLD‐100) and CaF2:Mn is studied. The TLD‐100 is dosimetry grade LiF manufactured by Harshaw‐Filtrol Partnership. It is believed that it contains about 200 ppm Mg and 7 ppm Ti as impurities. In each case the glow curve shows several peaks. Some of these peaks are quite strong and develop with dose. Others are weak. Kinetic parameters are calculated for the former using the initial rise method and Chen's modified formula. The two sets of values are found to be different. Some authors have suggested empirical formulae connecting peak temperature, Tm and activation energy, E. The empirical relations are tried for the values of E calculated, as well as those available in literature (for Tm above room temperature). It is found that a fairly reasonable relation existed between E and Tm. Copyright © 1987 WILEY‐VCH Verlag GmbH & Co. KGaA

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physica status solidi (a)