Investigation of thermoluminescence glow curves in quartz extracted from the Central Eastern Desert, Egypt

Farouk, Shrouk; El-Azab, Huda; Gad, Ahmed; El‐Nashar, Hassan F.; El-Faramawy, Nabil

doi:10.1002/bio.3760

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…It can be defined as the lowest radiation detection level of a prepared dosimeter or the threshold value of the sensed dose by the TL materials prepared. In terms of value, MDD is very similar to background signals [ 32 ].

where B* is the mion of thermoluminescence glow curves in quartz extracteal dose annealed four times, which were TLV17 = 3.6 nc, TLV30 = 1.95 nc and TLD-100 = 1.45 nc.…”

Section: Resultsmentioning

confidence: 99%

Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications

Al-Gain

Arib

Al-Said

et al. 2023

Sensors

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The production of thermoluminescence (TL) dosimeters fabricated from B2O3-Caf2-Al2O3-SiO2 doped with Cu and Pr for use in diagnostic radiology is the main goal of this research. The TL samples were synthesized via the melt-quench technique processed by melting the mixture at 1200 °C for 1 h, and, after cooling, the sample thus created was divided into two samples and retreated by heating for 2 h (referred to as TLV30) and for 15 h (referred to as TLV17). SEM and EDS analyses were performed on the TL samples to confirm the preparation process and to investigate the effects of irradiation dosimetry on the TL samples. Furthermore, the TL samples were irradiated with γ-rays using a 450 Ci 137Cs irradiator and variable X-ray beams (5–70 mGy). Two important diagnostic radiology applications were considered: CT (6–24 mGy) and mammography (2.72–10.8 mGy). Important dosimetric properties, such as the glow curves, reproducibility, dose–response linearity, energy dependence, minimum dose detectability and fading, were investigated for the synthetized samples (TLV17 and TLV30), the results of which were compared with the Harshaw TLD-100. The TLV17 dosimeter showed higher sensitivity than TLV30 in all applied irradiation procedures. The dose–response linearity coefficients of determination R2 for TLV17 were higher than TLD-100 and TLV30 in some applications and were almost equal in others. The reproducibility results of TLV17, TLV30 and TLD-100 were less than 5%, which is acceptable. On the other hand, the results of the fading investigations showed that, in general, TLV17 showed less fading than TLV30. Both samples showed a significant decrease in this regard after the first day, and then the signal variation became essentially stable though with a slight decrease until the eighth day. Therefore, it is recommended to read the TL dosimeters after 24 h, as with TLD-100. The SEM images confirmed the existence of crystallization, whilst the EDS spectra confirmed the presence of the elements used for preparation. Furthermore, we noticed that TLV17 had grown dense crystals that were larger in size compared to those of TLV30, which explains the higher sensitivity in TLV17. Overall, despite the fading, TLV17 showed greater radiation sensitivity and dose–response linearity compared with TLD-100. The synthetized TL samples showed their suitability for use as dosimeters in diagnostic radiology radiation dosimetry.

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where B* is the mion of thermoluminescence glow curves in quartz extracteal dose annealed four times, which were TLV17 = 3.6 nc, TLV30 = 1.95 nc and TLD-100 = 1.45 nc.…”

Section: Resultsmentioning

confidence: 99%

Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications

Al-Gain

Arib

Al-Said

et al. 2023

Sensors

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“…This is matching with the JCPDS card no. 03-065-0466 with hexagonal phase as listed previously 40 . All the crystalline diffraction peaks at about 20.8°, 26.6°, 36.5°, 39.5°, 40.32°, 42.47°, 45.8°, 50.6°, 54.9°, and 55.3° are attributed to the crystalline zirconium silicate according to JCPDS (card no.…”

Section: Resultsmentioning

confidence: 99%

Ecofriendly synthesis and characterization of Ni2+ codoped silica magnesium zirconium copper nanoceramics for wastewater treatment applications

Mansour

Hemdan

Elzwawy

et al. 2022

Sci Rep

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This article investigates the effect of Ni2+ content on structural (XRD, XPS), morphological (TEM), and magnetic behaviors of silica magnesium zirconium copper nanoceramics calcined at 800 °C. The sol–gel route is followed for the silica magnesium zirconium copper/(0.0–0.7) Ni2+ samples preparation. X-ray photoelectron spectroscopy is employed to analyze the chemical states of elements for the samples. The three representative binding energy magnitudes for O, Ni, and Cu reside at 534, 857, and 979 eV, consecutively. The saturation magnetization constricts with the elevation of Ni2+ content, while the magnetic hysteresis loop resembles the superparamagnetic attitude. The optical spectra present the possibility of direct and indirect transitions in the prepared nanoceramics. Energy gap (value and type), refractive index, and real and imaginary dielectric constant were extracted. The energy gap approaches 3.75 eV and 3.71 eV for direct and indirect transitions correspondingly with (0.7) Ni2+. The antimicrobial and the toxicity performance of all inspected nanocomposites were conducted against pathogenic microbes. The attained results evidenced that SMZC-0.7Ni possesses energetic antimicrobial potential against all targeted microbes. The investigated SMZC-0.7Ni nanocomposite functioned to eradicate frequent waterborne pathogens in wastewater at an appropriate dose (100 mg/L), demonstrating that SMZC can be utilized as a competent disinfectant in the municipal wastewater decontamination process. Inherently, SMZC-0.7Ni can be employed as an excellent nano-weapon against multiple dangerous microorganisms.

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“…The value of MDD is very close to the background signals. An empirical formula suggested by Shrouk et al [32] was used to determine the MDD of the prepared α‐alumina sample (P1) as following:

true M D D = (() B^{^{*}} + 2 σ_{B}) F

…”

Section: Resultsmentioning

confidence: 99%

A Co‐Precipitated α‐Alumina (Al₂O₃) used as a TL‐Micro Dosimeter

Said

Tantawy

El-Faramawy

et al. 2021

Zeitschrift anorg allge chemie

Self Cite

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This study describes the preparation method of alumina (Al 2 O 3 ) as a type of thermoluminescence dosimeter (TLD) to monitor gamma photons (γ-rays) in abroad band of radioactive doses (0.5 : 2000 Gy). Alumina is selected in this study because it has a relatively low cost TL material and can be easily prepared. Aluminum oxide (Al 2 O 3 ) was chemically prepared using two different methods which are the Sol-Gel and Co-precipitation methods. For each method, the produced alumina (Al 2 O 3 ) was divided into 4 groups which was thermally treated at (400, 600, 800, 1100°C) respectively for 6 hours for each group. The crystalline features, morphology and sample composition of the prepared samples were chemically characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX). Al 2 O 3 prepared by the Coprecipitation method which was treated at 1100°C (P4) was found to exhibit the highest gamma ray response compared to other samples. The deconvolution analysis showed that the main TL glow curve consisted of ( 5) overlapped peaks corresponding to number of traps. The linearity of the gamma response for this sample appeared in doses ranging from 1 Gy up to 200 Gy. The minimum detectable dose that can be detected by precipitated-alumina sample (P1) was calculated mathematically to be 3.653 mGy. The fading was found to be 45.6 % after being stored for 45 days at room temperature and approximately 65 % after 90 days. This sample was reproducible according to the repeated TL results for the same sample for 5 times as their values were very close from one other with standard deviation (� σ) 0.96 %. Henceforth, Co-precipitated αalumina can be used as a TL-Micro dosimeter.

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Investigation of thermoluminescence glow curves in quartz extracted from the Central Eastern Desert, Egypt

Cited by 14 publications

References 17 publications

Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications

Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications

Ecofriendly synthesis and characterization of Ni2+ codoped silica magnesium zirconium copper nanoceramics for wastewater treatment applications

A Co‐Precipitated α‐Alumina (Al₂O₃) used as a TL‐Micro Dosimeter

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Investigation of thermoluminescence glow curves in quartz extracted from the Central Eastern Desert, Egypt

Cited by 14 publications

References 17 publications

Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications

Dosimetric Study of Heat-Treated Calcium–Aluminum–Silicon Borate Dosimeter for Diagnostic Radiology Applications

Ecofriendly synthesis and characterization of Ni2+ codoped silica magnesium zirconium copper nanoceramics for wastewater treatment applications

A Co‐Precipitated α‐Alumina (Al2O3) used as a TL‐Micro Dosimeter

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Resources

About

A Co‐Precipitated α‐Alumina (Al₂O₃) used as a TL‐Micro Dosimeter