Confirmation of the Influence of Thermal Quenching on the Initial Rise Method in ?-Al2O3:C

Abstract

The initial rise method is one of the most reliable methods for evaluating the activation energy ðEÞ of a single glow peak. However, this method gives erroneous values of activation energy in cases where the thermal quenching effect is present during the initial rise measurements. It is well established that the thermal quenching effect is dominant in the thermoluminescence of Al 2 O 3 : C. The experimental glow-curve shape is highly disturbed by thermal quenching, so it cannot give reliable information about either its structure or the values of the trapping parameters, i.e. the activation energy, the frequency factor and the order of kinetics. The presence of a strong thermal quenching effect in Al 2 O 3 : C makes this material ideal to demonstrate the influence of this effect on the resulting values of activation energy as well as to examine suggested correction methods.

Simulation of the influence of thermal quenching on thermoluminescence glow‐peaks

“…It influences also the methods used to evaluate the trapping parameters of a TL glow‐peak. Under the influence of thermal quenching the initial rise method 10 underestimates the values of the activation energy E 6–8, 13. The activation energies evaluated by the peak shape methods 10 are also strongly underestimated 2.…”

An algorithm for the integrated deconvolution of radioluminescence and thermally/optically stimulated luminescence glow curves

“…There were three electron trap which are sensitive to the optical stimulation, one deep electron trap and one hole trap to be analyzed in Al 2 O 3 :C. The hole trap plays the role of RC, and it was possible to put h ¼ 1 because the W ¼ 1.1 eV and K ¼ 10 11 had been known for its thermal quenching constants (Kitis, 2002). The electron on the deep trap could be regarded as not affected by the light stimulation or irradiation and had been saturated as it was analyzed to maintain constant value through the entire process.…”

Thermal quenching of thermoluminescence in quartz samples of various origin

“…The thermal quenching not only constrains the TL intensity, but also highly distorts the structure of the experimental glow curve and strongly influences the experimentally evaluated TL kinetic parameters. The main difficulty regarding the effect of thermal quenching on the evaluation of the activation energy E has been discussed by Chen and Kirsh [16], Chen and McKeever [17], McKeever [18], Wintle [19], Petrov and Bailiff [20] and Kitis et al [9,21,22].…”