THE INFLUENCE OF HEATING RATE ON THE RESPONSE AND TRAPPING PARAMETERS OF ALPHA-AL2O3-C

The effects of the heating rate from 0.6 up to 50-degrees-C.s-1 on the thermoluminescence of alpha-Al2O3:C are very intensive. The material rapidly loses its high sensitivity as the heating rate increases, The peak shape characteristics, peak maximum and full width at half maximum agree only qualitatively with those theoretically predicted. The trapping parameters calculated by the curve fitting method, the peak shape method, the variable heating rate method and the initial rise method, were found to decrease as the heating rate increases. The validity of the results are dicussed in the framework of the kinetic models.