محسن محرابی

Beryllium oxide (BeO) nanopowder was synthesized using sol-gel method and the effects of changes of chemical reagents were investigated. Because of tissue equivalence and other outstanding thermoluminescence (TL) properties of the bulk material in X and γ dosimetry, the applicability of this nanostructure in TL dosimetry was studied following irradiation to the 137Cs source. The TL glow curve of this nanoparticle shows 3 component glow peaks at 391, 429 and 481 K. Computerized glow curve deconvolution program was used for obtaining the number of constituent glow peaks and trapping parameters. Activation energies of three components were obtained to be 1.4, 1.39 and 1.39 eV with kinetic orders of 2.03, 2.12 and 2.09 respectively. TL dose response of this phosphor is also investigated