Abstract
In a recent article, Kitis et al. [Nucl. Instr. and Meth. B 73 (1993) 367] discuss the effect of heating rate on three well-known thermoluminescence (TL) glow peaks; the 110°C glow peak of Norwegian quartz, the 210°C “dosimetry” glow peak of LiF:Mg,Ti (peak 5 in TLD-700) and the 250°C glow peak of natural Cap 2 : MBLE. The authors state that they focus their attention on “single, well-separated, glow peaks” in order to “test the theory”, presumably charge detrapping kinetic theory. To achieve this rather elusive goal for the 210°C peak in LiF:Mg,Ti, the authors employ a 140°C/60 min post-irradiation anneal to depopulate the low temperature peaks. There is, however, substantial evidence in the TL literature over the past three decades that an anneal of this duration at elevated temperatures induces various thermally activated clustering and precipitation processes leading to trap modification and possible creation of new traps.
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