Thermoluminescence properties of borosilicate glass doped with ZnO

Int J of Appl Glass Sci

Youssef

et al. 2017

Self Cite

Up until this moment, there was no detailed study concerning the kinetic parameters of zinc-doped borosilicate glass thermoluminescent (TL) material. A significant TL peak was observed upon gamma irradiating the samples, at around 185°C. Evaluating activation energy (E), frequency factor (s), and order of kinetics (b) were conventionally obtained by peak shape (PS) method, repeated initial rise (RIR), and variable heating rate (VHR) methods. The obtained results indicated that the zinc-doped borosilicate glass glow curve after gamma irradiation is legitimately a superposition of seven interfered glow peaks. Therefore, we cannot use computerized glow curve deconvolution (CGCD) method alone in determining the kinetic parameters in this case. Additive dose (AD), repeated initial raise (RIR), and variable heating rate (VHR) methods together with computerized deconvolution (CGCD) method by using the TolAnal software have been applied to determine the kinetic parameters of zinc-borosilicate glass due to the existence of several nearby overlapped peaks. RIR method gives the value of AE 2.3% average variation, for the activation energies, compared with those obtained by GCDC. The obtained results clearly show the consequences reliability. K E Y W O R D Sborosilicate, ionizing radiation, kinetic parameters, thermoluminescence, zinc

Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 97%

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Evaluation of the thermoluminescence kinetic parameters of zinc‐borosilicate glass after gamma‐irradiation

Soliman

Int J of Appl Glass Sci

Youssef

et al. 2017

Self Cite

“…A borate glass‐with minute amounts of impurities that are typically existent in most samples‐is experienced to a formation of electron‐hole pairs, as well as trapping charge carriers at the defect centers of the sample upon exposure to ionizing radiation. Up to the moment, researchers have extensively discussed the different mechanisms of luminescence in borate glasses . Borosilicate glasses are known to develop certain defects upon radiation exposure; such defects manifest in a formation of nonbridging oxygen hole centers (NBOHCs) which are relevant to the coloration in the visible region.…”

Section: Introductionmentioning

confidence: 99%

“…This centers release the electrons upon irradiation only which subsequently get trapped at various defect centers. The glass itself contain a number of these defect centers, and adding ions like Fe +2 , Fe +3 , and Zn +2 will increase them more …”

Section: Introductionmentioning

confidence: 99%

Thermoluminscence characteristics and dosimetric parameters of Nd⁺³ doped alkali borosilicate glass

Soliman

Int J of Appl Glass Sci

2018

Alkali‐borosilicate glass samples doped with 0.04‐0.7 mol % of neodymium oxide (20SiO2‐(50‐x) H3BO3‐20Na2CO3‐10ZnO‐xNd2O3) have been prepared by the melt quenching method. Thermoluminescence (TL) properties such as: dose–response, thermal fading, minimum detectable dose, and reproducibility of the gamma irradiated samples were investigated. Kinetic and trapping parameters such as trap depth, kinetic order, and frequency factor were studied by using the glow curve shape, initial rise and computerized glow curve de‐convolution (GCDC) methods. Among the studied concentrations, the obtained results showed that alkali‐borosilicate glass doped with 0.15 mol % neodymium oxide is the most sensitive one. This glass composition has a good linear TL gamma dose–response over a wide dose range of 0.5‐1000 Gy, as well as low fading and excellent reproducibility. These obtained features recommend the new prepared glass for many radiation detection applications.

Thermoluminescence characteristics of lithium borosilicate glass doped with Sm₂O₃

Abdel-Monem

Alazab²,

et al. 2020

Luminescence

Self Cite

Lithium borosilicate glass composite (SiO2–Li2CO3–H3BO3) doped with various concentrations of Sm2O3 (0–0.7 mole %) was prepared using the melt quenching method. The investigated thermoluminescence (TL) characteristics of the prepared system revealed that the highest TL response was obtained for this glass composite at 0.05 mol% Sm2O3. In this study, the 0.05 mol% Sm2O3‐doped lithium borosilicate glass composite was subjected to detailed dosimetric investigation in terms of its annealing condition, dose–response, and minimum detectable dose. The reproducibility of the response, thermal characteristics, and optical fading were also studied. The obtained results showed that the prepared glass composite had a linear dose–response over the wide gamma dose range 2Gy to 2 kGy, as well as reasonable thermal fading and excellent reproducibility. These attributes render the composite under investigation promising for utilization in radiation detection.