Synthesis, thermoluminescence characterizations, and photon attenuation parameters of MgAl2 O4 structure doped with different ions

Abstract

In this work, different ion co-doped Mg_1-x Al₂ O₄ nanophosphors, coded as M_5Cr-5La A, M_5Cr-5Cu A, M_{0.07Si-0.03Ce} A, and M_{0.05Ti-0.05La} A, where 5Cr-5La, 5Cr-5Cu, 0.07Si-0.03Ce, and 0.05Ti-0.05La representing the added ions (mol%), were prepared using the sol-gel method. Phase structure, transmission electron microscope (TEM) images, and element feasibility were checked using X-ray diffraction, TEM analysis, and energy dispersive X-ray (EDX) spectroscopy. Their thermoluminescence (TL) response was checked using a 5 Gy γ-test dose. The M_{0.05Ti-0.05La} A sample was found to be best for the TL response with an ~1.1 times response compared with that of the MTS-700 commercial detector. A wide range of dose-responses for the M_{0.05Ti-0.05La} A sample was found up to a 20 Gy γ-dose with the lowest detectable dose of ⁓23 μGy. Photon attenuation parameter results were Z_eff ⁓10, which mean that the M_{0.05Ti-0.05La} A sample could be considered as a near tissue equivalent material. Due to this study, the M_{0.05Ti-0.05La} A sample can be considered as a promising detector for application in personal and medical dosimetric monitoring.

Keywords: MgAl2O4 nanostructure; TL response; Zeff; sol-gel; γ-dose.