TL. Properties of Pure Al3 Grown by the Micro-Pulling Down Method

摘要

Carbon-doped AI_2O_3 is used as a material for dosimeter using thermoluminescence (TL) technique or optically stimulated luminescence (OSL) technique, and the emission bands are originated from defect emission. We have an original crystal growth named micro-pulling down (μ,-PD) method which had higher temperature graduation during the crystal growth. Thus, crystal defect is easy to be formed without some dopant using the |i-PD method. We grew pure AI_2O_3 samples with different heating condition, and different peaks in TL spectra were obtained among the pure AI_2O_3.