Thermoluminescence study of aluminium oxide doped germanium prepared by combustion synthesis method

Abstract

The present paper reports the optimum concentration of germanium (Ge) dopant in aluminium oxide (AhO3) samples prepared by combustion synthesis (CS) method for thermoluminescence (TL) studies. The samples were prepared at various Ge concentration i.e. 1 to 5% mol. The phase formation of un-doped and Ge-doped Al2O3 samples was determined using X-ray Diffraction (XRD). The sharp peaks present in the XRD pattern confirms the crystallinity of the samples. The samples were then exposed to 50 Gy Cobalt-60 sources (Gamma cell 220). TL glow curves were measured and recorded using a Harshaw Model 3500 TLD reader. Comparison of TL peaks were observed to obtain the best composition of Ge dopants. A simple glow curves TL peak at around 175°C for all composition samples was observed. It was also found that the composition of aluminium oxide doped with 3.0% of germanium exhibits the highest thermoluminescence (TL) intensity which is 349747.04 (a.u).