Article
Engineering, Electrical & Electronic
Hosam M. Gomaa, H. A. Saudi, I. S. Yahia, H. Y. Zahran
Summary: Sodium borate glass doped with cerium oxide improves its properties. Increasing the content of CeO2 in the glass results in improved stability, dielectric constant, and optical transparency. The glass containing 10 wt% CeO2 shows the best performance in photon shielding, and cerium-rich glass exhibits the highest resistance to gamma rays and fast neutrons.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Green & Sustainable Science & Technology
Essam Sidique, Sedky H. A. Hassan, Mohammad Mahmoud Dawoud
Summary: This study determines the distribution of radioactive isotopes in Egyptian commercial granites and ceramic tiles and assesses their potential risks to human health. The results show that the use of these materials in residential facilities is safe, as they fall within the recommended safety limits.
Article
Chemistry, Multidisciplinary
Iuliana Banu, Iuliana Aprodu
Summary: This study investigated the composition and properties of various rice flours and found that the black rice flour had the best bread quality. The results showed correlations between flour composition and dough properties, as well as the effects of water content on bread quality.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Aylin M. Deliormanli, Ahmet H. Deliormanli, Fatih Turan, Shams A. M. Issa, Ghada ALMisned, H. O. Tekin
Summary: This study investigated the physical, chemical, structural, and radiation attenuation properties of granite samples collected from Kutahya-Simav and Izmir. The findings revealed regional variations in the particle density and diameter, as well as variations in chemical compositions. The study concluded that the quantity of Fe2O3 in the composition was the predominant factor affecting the radiation shielding characteristics of the granites.
Article
Energy & Fuels
Thomas Junique, Patricia Vazquez, David Benavente, Celine Thomachot-Schneider, Yves Geraud
Summary: This study experimentally investigated the physicochemical properties of granitic rocks subjected to quenching cycles. The results showed that thermal fatigue led to crack formation, increased porosity, water uptake, crack size and volume, while decreasing wave velocities and Young's modulus. The impact of temperature and initial weathering conditions on these changes was also significant.
Article
Chemistry, Physical
Youwei Lai, Haoze Yu, Takuya Ishimoto, Marilou Cadatal-Raduban, Suchart Kothan, Pruittipol Limkitjaroenporn, Toshihiko Shimizu, Nobuhiko Sarukura, Jakrapong Kaewkhao, Kohei Yamanoi
Summary: The study found that non-doped lithium borosilicate glasses exhibit red shifting of the absorption peak and increased absorption during gamma ray irradiation, while the addition of cerium can improve the transparency of the glass, with different forms of cerium showing varied behavior after irradiation.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Construction & Building Technology
Pengfei Bian, Binggen Zhan, Peng Gao, Qijun Yu, Yonggan Yang, Li Hong, Wenliang Zhang
Summary: Foamed cement-based materials with high electromagnetic wave absorption performance and wide effective absorption bandwidth were successfully fabricated to prevent electromagnetic pollution of architectural space. The electromagnetic wave absorption performance of these materials was investigated, and the mechanism of electromagnetic wave transmission and attenuation was analyzed. The results show that porosity, sample thickness, and pore size have significant effects on the electromagnetic wave absorption performance. Foamed cement-based materials with high electromagnetic wave absorption performance, low bulk density, and cost-effective properties are considered as ideal candidates for electromagnetic wave absorption in engineering.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Meteorology & Atmospheric Sciences
S. Freidenreich, D. Paynter, P. Lin, V Ramaswamy, A. L. Jones, D. Feldman, W. D. Collins
Summary: This study focuses on aerosol forcing and evaluates flux biases in aerosol instantaneous radiative effect for two participating models using the RFMIP experimental protocol. Two primary sources of error were identified, with potential solutions suggested for future model development. The results demonstrate how the RFMIP protocol can help determine parameterized errors and provide a viable path towards more rigorous quantification and control of forcings for future CMIP exercises.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Physics, Applied
Z. Dehghani, F. Ostovari, M. Nadafan
Summary: Solvothermal synthesized MoSe2 nanosheets were characterized for their structure and optical properties. The results showed high-purity MoSe2 with a 2D layer structure, as well as saturable absorption and self-focusing behavior. Fourier transform infrared spectroscopy confirmed the presence of MoSe2 ions.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Kofi Ofori, Chi M. Phan, Ahmed Barifcani, Stefan Iglauer
Summary: The study on geo-sequestration of hydrogen sulphide in geological formations used molecular dynamics simulations to investigate the parameters as functions of pressure and temperature. The research found that water-H2S interfacial tension and phase densities could accurately predict experimental values. Additionally, the absorption of H2S into water increased with pressure, with a constant interfacial thickness below saturation pressure.
Article
Thermodynamics
Mohammad Javad Sharifi, Vahab Ghalehkhondabi, Alireza Fazlali
Summary: This study investigated the acoustic absorption performance of polyurethane (PU) elastomer with different molecular masses of polypropylene glycol (PPG) and a PU composite sample with multi-wall carbon nanotubes (MWCNT). The results showed that PU_2 exhibited good acoustic absorption properties, while PU_3 had higher hardness compared to PU_2.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Metin Usta, Ismail Hakki Karahan
Summary: This study aimed to produce Ni-Co-B material on steel substrates as a substitute for existing shielding materials, incorporating hexagonal boron nitride at different proportions. Structural and morphological properties were observed using XRD and SEM images. The samples were then irradiated with alpha, beta, and gamma rays to examine their radiation attenuation properties. The results showed an increase in incorporation levels as the hexagonal boron nitride ratios increased from direct current to alternating current. Gamma rays were absorbed the most, while positrons were absorbed the least. As the hexagonal boron nitride ratios increased and changed from direct current to alternating current, both radiation absorption rates and stopping power increased, with gamma photons having a greater range in alternating current.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Environmental Sciences
Kamila M. Harenda, Mateusz Samson, Radoslaw Juszczak, Krzysztof M. Markowicz, Iwona S. Stachlewska, Malgorzata Kleniewska, Alasdair MacArthur, Dirk Schuttemeyer, Bogdan H. Chojnicki
Summary: The study found that an increase in aerosol optical thickness and diffusion index significantly increased the net ecosystem production (NEP) of peatlands. This highlights the importance of considering light scattering effects in calculating global CO2 uptake estimates for such ecosystems.
Article
Metallurgy & Metallurgical Engineering
Ming He, Li-yuan Yu, Ri-cheng Liu, Yu-jing Jiang, Zhi-cong Li, Xiao-lin Wang
Summary: This study investigated the influence of temperature on the physical, mechanical and acoustic emission characteristics of granites. The results showed that as the temperature increased, the density and P-wave velocity decreased, the peak compressive stress and cohesion decreased, the peak strain and frictional angle increased. The maximum acoustic emission counts exhibited a decreasing trend with increasing temperature. When the temperature exceeded 573 degrees C, the crystal lattice structure of quartz changed, resulting in a significant decrease in the mechanical behavior of granites. The critical temperature range to characterize the influence of temperature on granites was found to be 500-600 degrees C.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Optics
Ming Cai, Hongxia Liu, Shulong Wang, Yindi Wang, Dong Wang, Mengwei Su
Summary: This paper investigates the transmission characteristics of grating-gate GaN-based HEMTs under different incident angles in the mid-infrared region, revealing their angle-tunable transmission properties. The research suggests that this structure holds promise for designing mid-infrared angle selection filters, sensors, and other subwavelength devices in the future.
Article
Chemistry, Analytical
Alper Ozseven, Iskender Akkurt
Summary: This study investigated the natural radioactivity level of Egirdir Lake surface water in Isparta province of Turkey and found that the gross-alpha and gross-beta activity concentrations were lower than the suggested limits of WHO screening procedure, indicating that the lake water is suitable for drinking as well as other purposes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Recep Kurtulus, Taner Kavas, K. A. Mahmoud, Iskender Akkurt, Kadir Gunoglu, M. I. Sayyed
Summary: By adding niobium oxide to waste soda-lime glass, the optical and physical properties can be improved, enhancing the radiation shielding effect, which shows potential value in gamma radiation applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Nuclear Science & Technology
M. Y. Hanfi, M. I. Sayyed, E. Lacomme, I. Akkurt, K. A. Mahmoud
Summary: The mechanical moduli and microhardness of TeO2-MgO glasses were theoretically calculated using the Makishimae-Mackenzie model, showing improved properties with higher MgO content. The radiation shielding capacity of the studied glasses was evaluated, with TM10 glass exhibiting the highest linear attenuation coefficient and TM45 glass showing the lowest value. The BXCOM program was used to calculate the effective atomic number and buildup factors of the glasses, as well as the effective removal cross-section for fast neutrons.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Recep Kurtulus, Taner Kavas, K. A. Mahmoud, Iskender Akkurt, Kadir Gunoglu, M. I. Sayyed
Summary: This study examined the potential use of waste soda-lime-silica (SLS) glass with varying MoO3 content in radiation shielding applications. The glass samples were found to have an amorphous structure and transparent appearance, with density and refractive index values increasing with higher MoO3 content. Experimental evaluation of the gamma-ray shielding ability showed an increase in linear attenuation coefficient (LAC) with increasing MoO3 ratio, confirming good agreement between experimental and theoretical calculations.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Y. S. Rammah, I. O. Olarinoye, F. El-Agawany, K. A. Mahmoud, Iskender Akkurt, ElSayed Yousef
Summary: The study on the effects of antimony trioxide on ternary tellurite-vanadium-antimonite glasses revealed that increasing the Sb2O3 insertion ratio significantly enhances the shielding capacity of the glasses, making them good candidates for various nuclear protection applications.
Article
Materials Science, Multidisciplinary
Recep Kurtulus, Taner Kavas, Iskender Akkurt, Kadir Gunoglu
Summary: In this study, waste CRT-derived glass systems doped with varying amounts of CoO were synthesized to evaluate their radiation shielding abilities. It was found that increasing CoO content in the glass resulted in improved radiation shielding properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Yonca Yahsi Celen, Iskender Akkurt, Huseyin Firat Kayiran
Summary: The study investigated the shielding properties of BaTi4O9 ceramic, including linear attenuation coefficients and other related parameters. Exposure buildup factor and energy absorption buildup factor were also calculated for gamma energies ranging from 10(-3) to 10(5) MeV using Phy-X/PSD software.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
M. I. Sayyed, Aljawhara H. Almuqrin, Ashok Kumar, J. F. M. Jecong, I. Akkurt
Summary: The TeO2-CdO-PbO-B2O3 glass system was prepared using the melt quenching method. It was observed that optical packing density, number of bonds per unit volume, and various elastic moduli increased with higher PbO content. Additionally, indirect and direct band gap energies decreased as the concentration of PbO increased. The mass attenuation coefficient derived from EPICS2017 library showed higher values at lower energies compared to Phy-X/PSD, but lower values at higher energies.
Article
Polymer Science
Roya Boodaghi Malidarre, Iskender Akkurt
Summary: This study investigated the neutron-gamma photon efficiency of two vinyl ester composites using MCNPX Monte Carlo Simulation Code, analytical calculations, and newly developed software. Results showed different characteristics in neutron-gamma photon spectra and fast neutron shielding capacity between colemanite and barite vinyl ester series.
Article
Materials Science, Composites
Iskender Akkurt, Roya Boodaghi Malidarre, Ilyas Kartal, Kadir Gunoglu
Summary: The study aimed to report the gamma ray-neutron attenuation parameters of eight types of vinyl ester pumice (V-P) composites across a wide energy range of 511-2140 keV using MCNPX and FLUKA codes. Results showed that FLUKA code can be used as an alternative technique to determine the attenuation features of vinyl ester composites, and the composite coded as V-P50 can be a competitive candidate for shielding gamma rays and neutrons.
POLYMER COMPOSITES
(2021)
Article
Nuclear Science & Technology
Kadir Gunoglu, Iskender Akkurt
Summary: In this study, linear attenuation coefficients of concretes containing different rates of basalt-magnetite aggregates were measured for gamma energies emitted from radioactive sources. The results showed a linear relationship between the linear attenuation coefficients and the basalt-magnetite ratio. The experimental and theoretical results were found to be compatible, indicating the importance of basalt-magnetite as an aggregate in developing concrete with radiation shielding properties.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Nuclear Science & Technology
Iskender Akkurt, Roya Boodaghi Malidarre
Summary: This study aimed to investigate the gamma photon-neutron attenuation parameters of marble concrete using MCNPX Monte Carlo code. The results showed that an increase in penetration depth led to an increase in Exposure Buildup Factor, and that Sigma(R) was closely related to the weight fractions of light elements in the selected shielding materials. NM-15 exhibited the best gamma photon shielding quality compared to other types of marble concrete.
RADIATION EFFECTS AND DEFECTS IN SOLIDS
(2021)
Article
Environmental Sciences
Iskender Akkurt, Parisa Boodaghi Malidarreh, Roya Boodaghi Malidarre
Summary: This study examines the shielding qualities of non-lead ceramic materials using FLUKA code and artificial neural network algorithm. The results show that increasing the concentration of a certain component in the material improves its density and neutron attenuation parameter, thereby enhancing its shielding ability.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Mucize Sarihan, Roya Boodaghi Malidarre, Iskender Akkurt
Summary: The present study investigates the shielding performance of charged-uncharged particles with the addition of a mixed type of cathode ray tube (CRT) in a glass system. The results show that CG1 glass sample has the best neutron attenuation and increasing the density of the glass leads to a higher linear attenuation coefficient. Additionally, CG1 glass structure demonstrates better capacity in stopping proton and alpha particles compared to other glass structures.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Iskender Akkurt, Faez Waheed, Hakan Akyildirim, Kadir Gunoglu
Summary: Radiation measurement is crucial in radiation physics to assess its potential impact on human health. The NaI(Tl) crystal is commonly used due to its cost-effectiveness and resistance to thermal effects. The performance of a detector system is important in determining absolute radiation values, with parameters measured using radioactive sources like Na-22, Cs-137, and Co-60 in this study.
INDIAN JOURNAL OF PHYSICS
(2022)
