Gamma radiation shielding investigations for selected germanate glasses

Sayyed, M.I.; Kaky, Kawa M.; Şakar, Erdem; Akbaba, Uğur; Taki, Malaa M.; Ağar, O.

doi:10.1016/j.jnoncrysol.2019.02.014

Cited by 108 publications

(22 citation statements)

References 41 publications

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“…Concerns related to the use of lead in high-radiation protective materials have grown due to the health risk associated with this heavy metal [69]. Different studies have been oriented to the development of lead-free radiation-shielding materials using Bi 2 O 3 , WO 3 , and MoO 3 [70,71]. Likewise, lead-free natural fillers such as Yahyali Sotone, which is composed by Fe 2 O 3 (75.28 wt %), SiO 2 (17.21 wt %), and Al 2 O 3 (4.24 wt %), have been used to obtain epoxy resin nanocomposites.…”

Section: Composites As An Approach To Enhance the Performance Of Polymers Against He-emrmentioning

confidence: 99%

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

Acevedo-Del-Castillo

Águila-Toledo

Maldonado-Magnere

et al. 2021

IJMS

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This paper revises the use of polymer nanocomposites to attenuate high-energy electromagnetic radiation (HE-EMR), such as gamma radiation. As known, high-energy radiation produces drastic damage not only in facilities or electronic devices but also to life and the environment. Among the different approaches to attenuate the HE-EMR, we consider the use of compounds with a high atomic number (Z), such as lead, but as known, lead is toxic. Therefore, different works have considered low-toxicity post-transitional metal-based compounds, such as bismuth. Additionally, nanosized particles have shown higher performance to attenuate HE-EMR than those that are micro-sized. On the other hand, materials with π-conjugated systems can also play a role in spreading the energy of electrons ejected as a consequence of the interaction of HE-EMR with matter, preventing the ionization and bond scission of polymers. The different effects produced by the interactions of the matter with HE-EMR are revised. The increase of the shielding properties of lightweight, flexible, and versatile materials such as polymer-based materials can be a contribution for developing technologies to obtain more efficient materials for preventing the damage produced for the HE-EMR in different industries where it is found.

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Section: Composites As An Approach To Enhance the Performance Of Polymers Against He-emrmentioning

confidence: 99%

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

Acevedo-Del-Castillo

Águila-Toledo

Maldonado-Magnere

et al. 2021

IJMS

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“…where, μ indicates the linear attenuation coefficient of absorber. A widely used important radiation shielding parameter (reflecting effectiveness of radiation protection for any materials) called half value layer is described as the sample thickness which reduces photon intensity to 50% of incident intensity and it can be computed according to following expression [19,26]:…”

Section: Calculationsmentioning

confidence: 99%

“…The µm, Zeff and Neff of WO3 based glass system were experimentally determined for the 0.356 and 0.662 MeV energies and theoretically calculated at 1 keV-100 GeV using XCOM program by Mostafa et al [18]. Sayyed et al theoretically investigated gamma ray attenuation behaviors of different germanate glasses in the energy range of 15 keV to 10 MeV by using WinXCOM program [19]. Ahmed et al experimentally measured different gamma ray attenuation parameters (μ, μm and HVL) of some sodium iron phosphate glasses at the energy range of 121.8 keV to 1407.9 keV [20].…”

Section: Introductionmentioning

confidence: 99%

Gamma Radiation Shielding Properties of Natural Glass Obsidian

Cengiz

Çağlar

Bílír

2020

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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The present study was carried out to estimate gamma radiation shielding properties of natural glass obsidian. For this purpose, linear attenuation coefficient, mass attenuation coefficient, mean free path, half-value layer, tenth-value layer, effective atomic number and effective electron number values of obsidian samples in black and brown colors were experimentally measured for 661.66, 1172.23 and 1332.48 keV gamma ray energies obtained from 137 Cs, and 60 Co radioactive sources. Measurements were performed at narrow-beam transmission geometry using a NaI(Tl) scintillation detector. In addition, all these parameters were theoretically calculated by using WinXCOM program in the energy region of 0.015 to 15 MeV. A good agreement was observed between theoretical and experimental values. Furthermore, energy absorption and exposure buildup factors (EABF and EBF) of obsidian specimens were determined in the energy range of 0.015 to 15 MeV using G-P fitting method. Finally, it can be concluded that these naturally occurring volcanic glasses can be used for radiation shielding applications.

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“…The prior knowledge of radiation attenuation parameters such as mass attenuation coefficients (µm), effective atomic number (Zeff), effective electron density (Nel) and buildup factors are critical in various practices such as medical physics, radiation physics, radiation dosimetry, radiotherapy, computerized tomography, and radiation biology. The most basic parameter among these parameters is the mass attenuation coefficient, which measures the probability of photon interaction (absorption or scattering) with the drug sample and this parameter and other parameters can be calculated using µm [4]. Buildup factor, an important term in radiation dosimetry besides that shield design can be categorized as energy absorption buildup factor (EABF) and exposure buildup factor (EABF).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of radiation attenuation properties of some cancer drugs

Çağlar¹,

Cengiz²

2021

Adıyaman University Journal of Science

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The present study was conducted to estimate the radiation attenuation parameters of six different antineoplastic drugs used in the cure of cancer diseases. The effective atomic number and electron density of anastrozole, epirubicin, gemcitabine, ifosfamide, methotrexate and paclitaxel were computed theoretically in the energy region of 1 keV to 100 GeV. The energy absorption buildup factors (EABF) and exposure buildup factors (EBF) for these chemotherapy drugs were also examined by applying Geometric Progression (GP) fitting method. The variation of EABF and EBF values with photon energy and penetration depth were presented graphically and discussed. The results obtained from this study pointed out that buildup factors rely on the chemical combination of the drugs, incident photon energy and penetration thickness. It was observed that ifosfamide had a significantly better radiation absorption effect compared to other drugs. The data obtained from this study are expected to be useful in the fields of radiation biology, radiation dosimetry and radiotherapy.

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Gamma radiation shielding investigations for selected germanate glasses

Cited by 108 publications

References 41 publications

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

Gamma Radiation Shielding Properties of Natural Glass Obsidian

Evaluation of radiation attenuation properties of some cancer drugs

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