A quantitative kinetic model for Al2O3:C: TL response to UV-illumination

This paper presents a quantitative kinetic model applicable to the important dosimetric material Al2O3:C. The model describes successfully the thermoluminescence (TL) response of the material to UV-illumination (206 nm). The energy levels in this model consist of the main dosimetric trap, two competing deep hole and deep electron traps, and the luminescence center. The model also describes successfully the experimental variation of the optical absorption coefficient K with UV-fluence. The values of the kinetic parameters are not arbitrary, but are obtained either from published experimental data, or by using reasonable physical assumptions. A correction factor is applied to the calculated UV-fluence to account for the fact that the samples used in the experiments were several optical lengths thick. By using this correction factor, the experimental data can be shown on the same graph as the calculated curves of TL vs. UV-fluence and K vs. UV-fluence, with the UV-fluences given in photonscm-2 and not in some arbitrary units.