Thermoluminescence study and trapping parameters of beta irradiated NaBaBO3:Gd3+ phosphor

A series of Gd3+ doped NaBaBO3 phosphors were synthesized via a combustion approach. The TL data collected by means of a combination of a commercial SCHOTT BG39 and HC414/46 filters was studied to evaluate basic kinetic parameters. Tm-Tstop and, various heating rate (VHR) and computerized glow-curve deconvolution analyses were utilized to analyze collected data. Our findings indicate that luminescence process in scrutinized material may obey first-order kinetics because no shift in the experimental TL glow curves with increased dose was observed. The TL dose response of the TL glow peaks exhibited a linear characteristic up to 20 Gy. The TmTstop method revealed that the number of the component TL glow peaks in the complex glow curve with and without preheating process consisted of six well-isolated and three overlapping glow peaks, respectively. The number of peaks obtained by deconvolution was perfectly matched with those obtained by Tm-Tstop and the figure of merit (FOM) values with and without preheating were 0.84% and 1.48%, respectively. The activation energy value found for the peak at 312 degrees C using the various heating rate (VHR) method was very close to those of deconvolution method. The total loss of response of TL glow curve sensitivity was much less (only +/- 2%) after 10 cycles of reuse.

Automated summary

A series of Gd3+ doped NaBaBO3 phosphors were synthesized via a combustion approach and the TL data was analyzed to evaluate basic kinetic parameters, showing that the luminescence process may follow first-order kinetics. Various analysis methods were utilized to study the TL glow peaks response and the number of component TL glow peaks in the complex glow curve. The results indicate a linear TL response up to 20 Gy and close values of activation energy were found using different methods.