Analysis of the glow curve of KMgF3:Lu compounds without resorting to the quasi-equilibrium approximation

J. MARCAZZÓ; E.CRUZ-ZARAGOZA; P.R. GONZALEZ; M. SANTIAGO; E. CASELLI

Recife

Congreso; 17th International Conference on Solid State Dosimetry (SSD17); 2013

A glow curve, for which its shape does not change significantly with dose, is usually analyzed by using first order kinetics (FO). This kinetics is derived from the equations describing the traffic of carriers (electrons and holes) among traps, recombination centres and bands, by assuming negligible retrapping, and by resorting to the quasiequilibrium approximation (QE). The validity of this approximation has been investigated. The investigations show that the QE approximation does not hold always, and that it may be responsible for the long tail showing the high temperature part of some glow peaks. In this article we report an expression for the thermoluminescence light, which is derived from the set of differential equations by assuming negligible retrapping, but without resorting to the QE approximation. The expression has been employed for analysing the glow curve of KMgF3:Lu fluoroperovskite compounds.