الفهرس 
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Abstract
This study is divided into two parts: the first one is to analytically study the analysis of the data obtained from thermoluminescent materials (glow curves), and the second part is to investigate the thermoluminescence (TL) dosimetric properties of phosphate glass samples doped with different concentrations of Lanthanum (La).
There exist many methods to analyze TL glow curves. However, the Computerized Glow Curve Deconvolution (CGCD) method is the most popular used. Despite its success, this method has some theoretical, mathematical, and computational problems. These problems pose a limit and precautions to the usage of CGCD in the field of thermoluminescence dosimetry (TLD). Thus, the first part of this study attempts to discuss and suggest new solutions to the computational problem. Some TL theoretical models and the kinetic parameters evaluation methods are also presented.
Within the framework of the one trap-one recombination (OTOR) level model, the exact equations that describe the intensity of a single TL glow peak of different order kinetics are considered. A reformulation of the expressions of the intensities of TL glow peaks in terms of the peak intensity IM, peak position TM, and the activation energy E, for each order of kinetics is achieved. A MATLAB code was developed. This code utilizes the new obtained TL deconvolution equations, to computationally deconvolute the TL glow curves. The code can also use the original equations of the OTOR model with free parameters frequency factor s, E, initial concentration of trapped electrons n0, and heating rate β. The code was tested by analyzing the reference glow curves of the GLOCANIN program. The obtained results agree with those previously reported by the GLOCANIN project with better values of the figure of merits (FOM). The new software was, also, applied to deconvolute glow curves measured from irradiated in-house prepared Al2O3 doped with Cr2O3 dosimeters. The considerations of the obtained equations show promising trends to understand a peak formation for different order kinetics that belongs to the OTOR level model.
The second part of this study was devoted to studying the characterization and analyses of the glow curves obtained from phosphate glass doped with different concentrations of Lanthanum. The kinetic parameters of the glow curves obtained from beta irradiated phosphate glass samples doped with Lanthanum were determined by the newly designed deconvolution software. The obtained results from the analyses indicated that the glow curves of the phosphate glass samples composed of five overlapping peaks. The activation energies of the five electron traps were located between 0.622 and 1.133 eV. The obtained kinetic parameters were evaluated by the designed software and another two methods, and all revealed a good agreement. It was found that the first three traps displayed non-first order behavior while the other two-deep traps obeyed nearly first-order kinetics.