Caracterização óptica, física, e termoluminescente do sistema Vítreo LBA(Li₂O•B₂O₃•Al₂O₃) dopado com Ag

Abstract

The LBA vitreous system of nominal composition 50Li₂O·45B₂O₃·5Al₂O₃ (mol%), without doping and doped with xAg (% wt), where, x = (0.01; 0.03; 0.05; 0.07; 0.09; 0.1; 0.3; 0.5; 0.7 ; 0.9), synthesized by the melting method and study using optical absorption (AO), Thermal Differential Analysis (DTA), X-ray Diffraction (XRD) and Thermoluminescence (TL) techniques. The AO spectra of the Ag-doped dimensions show the formation of plasma absorption bands shifting from 427 nm to 419 nm with increasing Ag concentration. These bands are characteristic of Ag nanoparticles (NPs), indicating that NPs were formed along with X-ray diffractograms (XRDs) that show peak formation at 2ϴ equal to 38.4°, 43.3°, 64.6° and 77.7°, characteristic of silver nanostructures and those which cause a decrease in the size of the concentration increase. As undoped and Ag-doped samples they received a 10 Gy dose from an ionizing irradiation source with an energy of 6 MeV, and then performed as TL measurements, which exhibited a band formation around 325°C for as 0.01; 0.07 and 0.09 (wt%) of Ag but with lower TL intensity compared to the matrix without doping. This temperature (325ºC) is relatively high about the ambient temperature as sampling shows to be stable at ambient temperature, therefore, these samples can be used to monitor to detect ionizing radiation.