It has been accepted by a large number of workers that the glow curve
of LiF TLD-100 can be described by thermoluminescence (TL) peaks follo
wing the Randall-Wilkins (RW) equation, even though the model fails to
explain a number of experimental facts. A further simplification of t
he model is the Podgorsak-Moran-Cameron (PMC) approximation which is a
lso in use. This paper points out the limitation of the PMC approximat
ion in deconvoluting glow curves of LiF TLD-100.