A study of thermoluminescence of peak I in α-Al2O3:C: a computer simulation approach

Abstract

This work explores the thermoluminescence properties of Peak I in α-Al2O3: C. The study employs the OTOR model to simulate the thermoluminescent behavior of Peak I, for both irradiation and readout stages, using the Mathematica software. The simulation results show that (i) the concentration of holes and electrons in the valence band and conduction band respectively, increases with irradiation time and saturates for irradiation times longer that 10 s (1017 Gray) for the total electron trap concentration (N) of 1015; (ii) the maximum peak intensity decreases with increasing heating rate; (iii) the maximum peak position shifts towards higher temperatures with increasing heating rate; (iv) the FWHM increases with increasing heating rate; (v) the FWHM, the peak position and the geometrical factor ,μ, are all independent of the irradiation dose; and (vi) the maximum peak intensity increases with increasing irradiation dose. Thus, the TL of Peak I in α-Al2O3: C follows first-order kinetics.