Geochemistry of Dredged Sediments and Pollutant Impacts of Heavy Metals from New Damietta Harbor, Egypt using X-ray Fluorescence Spectrometry Aya Ali, Atef El taher, ashraf elazab, sayed sultan Egyptian Journal of Chemistry, 2026 Heavy metals comprise a diverse group of elements that vary in their chemical properties and biological functions. Typically classified as transition elements in the Periodic Table, heavy metals are defined as elements with a specific gravity exceeding 5 g/cm³. These metals are predominantly found in soil and aquatic environments, while their presence in the atmosphere is relatively limited, occurring mainly as particulates or vapours. In this study, ten dredged sediment samples were collected from New Damietta Harbour, Egypt, and analysed for trace and heavy metals (Cr, Cu, Ni, Zn, Zr, Ga, Sr, Y, V, Nb, Pb, and Ba) using X-ray fluorescence (XRF) spectrometry. Geochemical indices, including the geoaccumulation index (Igeo), contamination factor (Cf), and pollution load index (PLI), were applied to assess the extent of contamination and identify potential sources. The results revealed that most metals were present at concentrations below shale and crustal background levels, suggesting low to moderate contamination. However, zirconium (Zr) showed elevated concentrations exceeding the average shale. Pearson correlation analysis demonstrated positive associations between several metals, reflecting mixed lithogenic and anthropogenic origins. The calculated PLI values ranged from 1.97 to 3.82, classifying the sediments as moderately to highly pollute. This study provides a comprehensive geochemical baseline for New Damietta Harbor and highlights the importance of regular monitoring programs to prevent potential ecological impacts and to guide future environmental management efforts.
Radiological Assessment of Wheat Flour Consumed in Iraq: Natural Radioactivity, Ingestion Dose, and Organ-Specific Risk Y. A. Baqir, M. Abdelmohsen, A. El-Taher Radiochemistry, 2026 Abstract This study presents a comprehensive radiological assessment of wheat flour consumed in Iraq, with emphasis on internal exposure resulting from ingestion. Nine wheat flour samples collected from different Iraqi markets were analyzed using a NaI(Tl) gamma-ray spectrometry system to determine the activity concentrations of naturally occurring radionuclides (238U, 232Th, and 40K). The measured activity concentrations were 3.6–6.5 Bq/kg for 238U, 1.28–2.23 Bq/kg for 232Th, and 18.4–26.3 Bq/kg for 40K, with the corresponding mean values of 5, 1.7, and 22 Bq/kg, respectively. Radiological health risks associated with wheat flour consumption were evaluated through several dose metrics, including the annual effective ingestion dose (EID), annual stochastic effective dose (ASED), excess lifetime cancer risk (ELCR), and organ-specific committed doses. The calculated EID values ranged from 0.0013 to 0.0018 mSv·year–1, representing less than 1% of the recommended public exposure limit. ELCR values were of the order of n × 10–5, indicating negligible cancer risk. Organ-specific dose assessments for sensitive tissues such as lungs, bone marrow, and reproductive organs revealed very low committed doses, all well below internationally accepted safety thresholds. For completeness, external exposure indices, including radium equivalent activity, hazard indices, and absorbed gamma dose rate, were also calculated and found to be insignificant compared to ingestion-related exposure. Overall, the results demonstrate that wheat flour consumed in Iraq contains natural radionuclide levels within normal background ranges and poses no significant radiological health risk. These findings provide valuable baseline data to support food safety monitoring and radiological protection programs in Iraq.
Radiological Assessment and Hazard Evaluation of Natural Radionuclides in Cement Manufactured in Iraq Y. A. Baqir, M. Abdelmohsen, A. El-Taher Radiochemistry, 2026 Abstract Comprehensive radiological assessment of cement products manufactured and commercially available in different regions of Iraq was made. Eighteen cement samples were collected and analyzed using gamma-ray spectrometry to determine the activity concentrations of the naturally occurring radionuclides 226Ra, 232Th, and 40K. The measured mean activity concentrations were 25 ± 6, 14 ± 5, and 163 ± 70 Bq/kg, respectively, all of which are below the worldwide average values recommended by UNSCEAR. Radiological hazard parameters, including radium equivalent activity (Raeq), absorbed gamma dose rate (Dγ), annual effective dose equivalent (AEDE), external and internal hazard indices (Hex and Hin), and excess lifetime cancer risk (ELCR), were evaluated to assess potential health risks associated with the use of cement as a building material. The obtained mean Raeq (56.8 Bq/kg) and Dγ (26.6 nGy/h) values are significantly lower than the recommended safety limits, indicating the low level of radiological exposure. The estimated AEDE was 0.28 mSv/year, while ELCR values remained well within acceptable limits. Correlation analysis revealed strong positive relationships between 226Ra, 232Th, and 40K, suggesting a common geochemical origin of these radionuclides in cement raw materials. One sample exhibited relatively elevated 40K activity, likely attributable to local geological characteristics or raw material composition.
Assessment of Radiological Hazards of Natural Radionuclides 226Ra, 232Th, and 40K for Valley Sediments, Wadi Al-Maia, Eastern Desert, Egypt A. El-Taher, G. Salaheldin, L. Abd Elslam Radiochemistry, 2025 Abstract This study investigates the natural radioactivity of 40K, 226Ra, and 232Th in valley sediments from Wadi Al-Maia located in Egypt’s Eastern Desert. Radiation monitoring was conducted using high-resolution gamma-ray spectrometry with a NaI(Tl) detector. The activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K were measured. Based on these measurements, several radiological hazard parameters were calculated, including the absorbed dose rate (ADR), radium equivalent activity (Raeq), gamma index (Iγ), annual gonadal dose equivalent (AGDE), annual effective dose equivalent (AEDEout and AEDEin), and the external and internal hazard indices (Hₑₓ and Hᵢn).The average values of these parameters were 347 nGy/h (ADR), 724 Bq/kg (Raeq), 2.73 (Iγ), 2471 μSv/year (AGDE), 425 μSv/year (AEDEout), 1700 μSv/year (AEDEin), 1.96 (Hex), and 2.47 (Hin), all of which exceed the worldwide recommended limits. These results indicate that the study area exhibits elevated natural radioactivity levels and potential radiological health risks. The findings can serve as a baseline for future monitoring of natural radionuclide contamination and radiological risk assessment in the Eastern Desert of Egypt.
Effective of prompt and delayed gamma emission on the nuclear radiation shielding effectiveness of prevalent natural minerals Islam M. Nabil, Said M. Kassem, A. F. El-Sayed, Soliman M. El-Talawy, Atef El-Taher Scientific Reports, 2025 This study aims to explore the neutron and emphasizing gamma emission (prompt and delayed) radiation attenuation capabilities of the different natural minerals, including Magnetite, Rutile, Ilmenite, and concrete NBS materials. The Monte Carlo N–Particle simulation code (MCNP) and the EpiXs software (EpX) have been used to inspect the studied compounds against neutrons associated with secondary energetic γ-rays at the range 0.03–15 MeV of energy through different thicknesses 2–12 cm. For all materials, linear attenuation coefficients (µ), effective atomic number (Z ef ), half-value layer (H 0.5 ), tenth value layer (T 0.1 ), mean free path (MFP), and radiation protection efficieny (RP E ) are estimated. Additionally, fast neutrons flux, secondary γ-rays, the cross-section for the removal of fast neutrons (Σ R ), the half-value thickness (HVLn), and the relaxation length (λn) were accurately calculated. The results show that Magnetite minerals are better than Rutile, Ilmenite, and concrete NBS minerals at lower energies zones. Moreover, it is more effective in providing protection against intense photons, fast neutrons, and secondary produced γ-rays, which makes this mixture an potentional common shield for a combination of various environmental radiation.
Assessment of Natural Radioactivity and Radiological Hazards in Dredged Sediments from Damietta Harbor, Egypt Aya Ali, A. El-Azab, S. Alashrah, S. Makhluf, A. El-Taher Radiochemistry, 2025 Abstract 50 sediment samples were taken from three basins 600 m far from the beach in Egypt (Damietta harbour). The samples were thoroughly analyzed to calculate the natural radioactivity levels measured by gamma-ray spectrometry using a NaI (Tl) detector. The of specific activity varied from 10 ± 0.5 to 23 ± 1.1 with an average of 14.1 ± 1.2 Bq kg–1, from 7 ± 0.6 to 59 ± 3 with an average of 18.5 ± 1.3 Bq kg–1, and from 108 ± 5 to 402 ± 23 with an average of 287 ± 15 Bq kg–1 for 226Ra, 232Th, and 40K, respectively. These levels are lower than the worldwide average values. Hazardous radiation parameters such as radium equivalent, annual dose, and external hazards were estimated and compared to the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) recommended levels. The results showed that Damietta harbour sediments are safe in terms of natural radioactivity.
Georadiological Assessment and Radiological Hazard Mapping of Uranium-Enriched Formations in El Sheikh Soliman Area, Southwestern Sinai, Egypt E. Adel, A. Elshamy, W. R. Alharbi, A. El-Taher Radiochemistry, 2025 Abstract High-resolution georadiological assessment of 66 stratigraphically and lithologically varied rock samples from El Sheikh Soliman region (selected as the area of ground magnetic survey) was performed using gamma-ray spectrometry and multivariate statistical tools. The concentrations and distribution of natural radionuclides 238U, 238Ra, 232Th, and 40K were measured, and the associated radiological hazards were evaluated. The activity levels of 238U ranged from 45.1 to 1073.2 Bq/kg (mean = 316.4 Bq/kg), with peak values in ferruginous siltstones (Um Bogma formation), organic-rich shales (Adedia formation), and micaceous shales (Abu Hamata formation). Over 70% of samples exhibited uranium-series disequilibrium (U/Ra >1.5), suggesting recent uranium remobilization under oxidizing-suboxic conditions. Radiological indices such as radium equivalent activity (Raeq), absorbed dose rate (Dr), and annual effective dose equivalent (AEDE) indicated that 36% of samples exceeded the Raeq safety limit of 370 Bq/kg, and 41% surpassed the global AEDE average (0.07 mSv/year), with strong correlations (r > 0.85) between 238U and hazard indicators. Although 232Th concentrations were lower (22.4–186.1 Bq/kg), significant contributions were found in felsic and metavolcanic rocks due to accessory minerals like monazite and zircon. The 40K levels (54.3–1420.5 Bq/kg) were higher in granitic and clay-rich samples containing K-feldspar and muscovite. While 232Th and 40K posed lower direct risks, their cumulative effects influenced Raeq and Hex indices. Principal component analysis explained 87.3% of total variance, with uranium being the dominant factor. Hierarchical cluster analysis revealed four geochemically distinct groups, reflecting variations in lithology, mineralogy, and redox behavior. The study highlights the value of integrating radiometric and statistical data for effective radiological hazard mapping and environmental monitoring in uranium-rich arid zones.
Assessing the Sensitivity of a Single Crystal CVD Diamond Detector with Synchrotron Microbeam Techniques M. A. E. Abdel-Rahman, W. R. Alharbi, M. Y. M. Mohsen, A. Abdelghafar Galahom, A. El-Taher, J. Smedley, A. Lohstroh Physics of Particles and Nuclei Letters, 2025 Abstract In this study, X-ray sensitivity mapping was performed using a synchrotron microbeam at the National Synchrotron Light Source (NSLS, USA) on a low-purity single crystal CVD diamond sample labeled VS-Pt. This CVD-grown sample was chosen for its unique characteristics, including thin nitrogen lines and substrate areas, which can be identified and observed through synchrotron microbeam mapping. The objective of the study was to investigate the effects of varying pulsed bias voltage, beam size, beam step displacement, and device annealing on the homogeneity of the current response in the maps. Additionally, the impact of DC bias voltage, bias polarity, and bias pulse width was explored to determine the optimal conditions for synchrotron measurements. Theoretical relationships between the averaged normalized response and the applied bias voltage under synchrotron irradiation were also examined. The results showed that, compared to the annealed sample, the average normalized response of the detector reached saturation at a shorter pulse width for the bias voltage. Bias polarity did not significantly affect the device sensitivity, which contrasted with the annealed sample that exhibited noticeable variations in the images. Sensitivity saturation in the un-annealed sample occurred at 200 V or less. After annealing, the normalized response at –20 V increased linearly with pulse width, while the response at +20 V showed a slight tendency toward saturation, indicating that bias polarity influenced sensitivity. Following annealing, the sensitivity increased, possibly due to photoconductive gain resulting from a sensitizing effect. Moreover, the sensitivity was influenced by the sign of the DC bias, which differed from the pre-annealing response, where minimal differences were observed between images at positive and negative biases. Points near the nitrogen line exhibited slower current rise and decay times, likely due to shallow trap levels, while the substrate region showed lower photocurrent. Bias polarity affected the current amplitude, potentially due to polarization effects. When comparing the theoretical and experimental results for the VS-Pt sample, the theoretical values consistently fell below the experimental data. The sensitizing effect may contribute to this higher-than-expected response. Finally, as the beam size and/or step size decreased, the device sensitivity increased. This phenomenon is likely associated with the priming effect (pre-irradiation), whereby the sample accumulates a larger pre-irradiation dose as the beam or step size decreases. These insights could guide the development of detectors with improved spatial resolution, fast time response and dose-rate dependence, which are crucial for applications in dosimetry for X-ray radiotherapy and radiobiology applications as well as in beam monitors for accelerators and synchrotron radiation measurements.
DETERMINATION OF PHOSPHATE ROCK MINES SIGNATURES USING XRF AND ICP-MS ELEMENTAL ANALYSIS TECHNIQUES: RADIONUCLIDES, OXIDES, RARE EARTH, AND TRACE ELEMENTS Romanian Reports in Physics, 2023
Influence of γ-irradiation dose on the structure, linear and nonlinear optical properties of BiI3 thick films for optoelectronics Department of Physics, Faculty of Science, Al-Azhar University, Assiut, A. M. Abdelnaeim, M. Salah, Department of Physics, Faculty of Science, Al-Azhar University, Assiut, E. El Sayed Massoud, Department Biology, Faculty of Sciences, Arts in Dahran Aljanoub, King Khalid University, Saudi Arabia, A. EL-Taher, Department of Physics, Faculty of Science, Al-Azhar University, Assiut, E. R. Shaaban, Department of Physics, Faculty of Science, Al-Azhar University, Assiut Digest Journal of Nanomaterials and Biostructures, 2022
Studying the structural, optical spectroscopic ellipsometry and electrical properties of variable-CdS thickness/CdTe for solar cell applications Physics Department, College of Science, Arts, Jouf University, P.O. Box 756, Al-Gurayyat, Saudi Arabia, M. A. Sebak, S. Ghalab, Physics Department, College of Science, Arts, Jouf University, P.O. Box 756, Al-Gurayyat, Saudi Arabia, Atef El-Taher, Physics Department, Faculty of Science, Al-Azhar University, Assiut, 71542, Egypt, E. R. Shaaban, Physics Department, Faculty of Science, Al-Azhar University, Assiut, 71542, Egypt Chalcogenide Letters, 2022
Structural and thermal properties of nickel oxide nanoparticles doped cadmium zinc borate glasses: preparation and characterization Digest Journal of Nanomaterials and Biostructures, 2022
Effect of uv-irradiation time on the structural and optical properties of polycrystalline of 720 nm of znse film for optoelectronic applications Chalcogenide Letters, 2020
Sedimentlogical studies of mangrove environment at Hamata –Wadi El-Gemal protected area, red sea coast, Egypt International Journal of Scientific and Technology Research, 2020
Verification of235u mass content in some nuclear fuel fabrication for candu reactors by an absolute method Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt, Ahmed G. Mostafa, Sayed A. Makhlouf, Elham El-Hakim, Morsy S. El-Tahawy, Abdel Fatah A. Hamed, Atef El-Taher, Physics Department, Faculty of Science, Al-Azhar University, Assiut, Egypt, Nuclear Fuel Research Laboratory, Nuclear Research Center, Atomic Energy Authority, Inshas, Egypt, Nuclear Safeguards, Physical Protection Department, Egyptian Nuclear, Radiological Regulatory Authority, Cairo, Egypt Nuclear Physics and Atomic Energy, 2020
Measurement of radon exhalation rate and annual effective dose from marine sediments, ras tanura, saudi arabia, using CR-39 detectors Romanian Journal of Physics, 2019
Heavy metal detection in soil and related health aspect at aila inundated sundarban region, bangladesh International Journal of Scientific and Technology Research, 2019
Radon activity measurements in irrigation water from Qassim Province by RAD7 Journal of Environmental Biology, 2016
Study of structural, electronic and magnetic properties of transition-metalperovskite oxides SrMO3(M = Mn and Co) by XRD and DFT techniques Digest Journal of Nanomaterials and Biostructures, 2016
Assessment of natural radioactivity level and radiation hazards in soil samples of Wadi Al- Rummah Qassim province, Saudi Arabia Journal of Environmental Biology, 2016
Assessment an accurate TL dosimeter recommended for patients and staff working in field of radiation: The physical properties of different kinds of TL dosimeters Afinidad, 2014
Elemental analysis of phosphate fertilizer consumed in Saudi Arabia Life Science Journal, 2013
Assessment of heavy metals concentrations resulting natural inputs in Wadi El-Gemal surface sediments, Red Sea Coast Life Science Journal, 2013
Rheological properties of blood serum of rats after whole body irradiation with different gamma radiation doses in vivo Life Science Journal, 2013
Recent benthic foraminifera in the saline pool and its surrounding areas at ras shukier and Gulf of Suez, Egypt Indian Journal of Marine Sciences, 2013
Determination of thermoluminescence kinetic parameters of bauxite by Computer Glow Curve deconvolution Method (CGCD) Life Science Journal, 2013
A study on transfer factors of radionuclides from soil to plant Life Science Journal, 2013
Assessment of natural radioactivity levels and radiation hazards for building materials used in Qassim area, Saudi Arabia Romanian Reports of Physics, 2012
Natural radioactivity levels and associated radiation hazards in Nile river sediments from Aswan to El-Minia, Upper Egypt Indian Journal of Pure and Applied Physics, 2012
Natural radioactivity levels in phosphate fertilizer and its environmental implications in assuit governorate, upper Egypt Indian Journal of Pure and Applied Physics, 2010
Determination of traces of uranium and thorium in some Egyptian environmental matrices by instrumental neutron activation analysis Environment Protection Engineering, 2004
Multi-element determination of sandstone rock by instrumental neutron activation analysis Indian Journal of Pure and Applied Physics, 2004
Gamma-ray absorption and scattering coefficients for two sedimentary rocks Indian Journal of Pure and Applied Physics, 1995
RECENT SCHOLAR PUBLICATIONS
Integrating multivariate statistics and natural radioactivity for radiation hazard assessment in Abu-Tartur phosphate mine, Egypt H Negm, M Alzaid, MAM Uosif, HS Najm, R Elsaman, A El-Taher, ... Journal of Radiation Research and Applied Sciences 19 (1), 102204 , 2026 2026
A Comparative analysis of radiation shielding character in engineered bricks blended with CaO, Al2O3, and Fe2O3 additives: thermal stability and Phy-X simulation insights into … AS Alshammari, U Rilwan, F Alafer, M AL-Kamali, A Almutery, A El-Taher Radiation Physics and Chemistry, 113674 , 2026 2026 Citations: 1
Radiological Assessment and Hazard Evaluation of Natural Radionuclides in Cement Manufactured in Iraq YA Baqir, M Abdelmohsen, A El-Taher Radiochemistry 68 (1), 90-97 , 2026 2026
Integrated Assessment of Natural Radioactivity, Radiological Hazards, and Uranium–Trace Element Geochemistry in Rocks from El Sheikh Soliman, Southwest Sinai E Adel, A Elshamy, A El-Taher 2026
Geochemistry of Dredged Sediments and Pollutant Impacts of Heavy Metals from New Damietta Harbor, Egypt using X-ray Fluorescence Spectrometry AAA Mohammed, SA Makhlouf, A El–Azab, AM El-Taher 2026
Determination of Gamma Photon Absorption Characteristics of Rice Husk Ash–Doped Concrete as an Alternative Radiation Shielding Material A Abdul-Jamiu, U Ibrahim, AA Mundi, IM Mustapha, A El-Taher 2026
Health Effects Assessment of Personnel Exposed to Radiation from Background and Scattered Radiation around X-ray Machines at Federal Neuropsychiatric Hospital, Maiduguri HM Umar, IW Fawole, A Adamu, AM El-Taher 2026
Assessment of Radiological Hazards of Natural Radionuclides 226 Ra, 232 Th, and 40 K for Valley Sediments, Wadi Al-Maia, Eastern Desert, Egypt A El-Taher, G Salaheldin, LA Elslam Radiochemistry 67 (6), 962-969 , 2025 2025
Assessment of Natural Radioactivity and Radiological Hazards in Dredged Sediments from Damietta Harbor, Egypt A Ali, A El-Azab, S Alashrah, S Makhluf, A El-Taher Radiochemistry 67 (6), 970-978 , 2025 2025
Effective of prompt and delayed gamma emission on the nuclear radiation shielding effectiveness of prevalent natural minerals IM Nabil, SM Kassem, AF El-Sayed, SM El-Talawy, A El-Taher Scientific Reports 15 (1), 39365 , 2025 2025 Citations: 2
Using a Focused X-Ray Beam for Mapping Sensitivity of a Single Crystal CVD Diamond Detector: Abstracts Y Alzamil, MYM Mohsen, M Alobaid, A El-Taher, A Lohstroh, ... Письма в ЭЧАЯ 22 (4) , 2025 2025
Georadiological Assessment and Radiological Hazard Mapping of Uranium-Enriched Formations in El Sheikh Soliman Area, Southwestern Sinai, Egypt E Adel, A Elshamy, WR Alharbi, A El-Taher Radiochemistry 67 (5), 708-720 , 2025 2025
Assessing the Sensitivity of a Single Crystal CVD Diamond Detector with Synchrotron Microbeam Techniques MAE Abdel-Rahman, WR Alharbi, MYM Mohsen, AA Galahom, A El-Taher, ... Physics of Particles and Nuclei Letters 22 (5), 1262-1277 , 2025 2025 Citations: 1
Using a Focused X-Ray Beam for Mapping Sensitivity of a Single Crystal CVD Diamond Detector Y Alzamil, MYM Mohsen, M Alobaid, A El-Taher, A Lohstroh, ... Physics of Particles and Nuclei Letters 22 (4), 901-916 , 2025 2025 Citations: 2
Investigating the Sensitivity of CVD Diamond Detectors with Synchrotron Microbeam Mapping MAE Abdel-Rahman, WR Alharbi, MYM Mohsen, AA Galahom, A El-Taher, ... Physics of Particles and Nuclei Letters 22 (4), 883-900 , 2025 2025 Citations: 2
Indoor concentrations of radon in Cairo subway N El-Faramawy, O Abo-Bakr Omar, S Rawash, M El-Kinawy, A El-Taher, ... Journal of Physics: Conference Series 3075 (1), 012001 , 2025 2025
Feasibility study on the possibility of utilizing e-nut shell ashes for gamma-radiation protection application U Rilwan, MA Abdulazeez, I Maina, OW Olasoji, A El-Taher, ... Radiation Physics and Chemistry 233, 112748 , 2025 2025 Citations: 13
Leveraging machine learning for accurate DNBR prediction using python MYM Mohsen, M Al Meshari, Y Alzamil, A Alhammad, K Alenazi, ... Nuclear Engineering and Technology 57 (7), 103532 , 2025 2025 Citations: 4
Gamma radiation shielding and thermal performance of concrete with coconut shell ash replacement U Rilwan, MA Abdulazeez, I Maina, OW Olasoji, SF Olukotun, A El-Taher, ... NIPES-Journal of Science and Technology Research 7 (2), 254-262 , 2025 2025 Citations: 19
Distribution of Uranium, Thorium, and Potassium and Their Bearing on the Radiogenic Heat Production of Some Granitic Rocks from the Eastern and Western Deserts M Abdelmohsen, MA Elhaddad, A El-Taher Radiochemistry 67 (3), 358-377 , 2025 2025
MOST CITED SCHOLAR PUBLICATIONS
Study of the spatial distribution of natural radioactivity in the upper Egypt Nile River sediments A El-Gamal, S Nasr, A El-Taher Radiation measurements 42 (3), 457-465 , 2007 2007 Citations: 244
Effect of film thickness on microstructure parameters and optical constants of CdTe thin films ER Shaaban, N Afify, A El-Taher Journal of Alloys and Compounds 482 (1-2), 400-404 , 2009 2009 Citations: 224
Natural radioactivity and dose assessment for phosphate rocks from Wadi El-Mashash and El-Mahamid Mines, Egypt AGE Abbady, MAM Uosif, A El-Taher Journal of Environmental radioactivity 84 (1), 65-78 , 2005 2005 Citations: 219
A study on transfer factors of radionuclides from soil to plant A Alharbi, A El-Taher Life Science Journal 10 (2), 532-539 , 2013 2013 Citations: 138
Assessment of natural radioactivity levels and radiation hazards due to cement industry A El-Taher, S Makhluf, A Nossair, ASA Halim Applied Radiation and Isotopes 68 (1), 169-174 , 2010 2010 Citations: 130
Gamma spectroscopic analysis and associated radiation hazards of building materials used in Egypt A El-Taher Radiation Protection Dosimetry 138 (2), 166-173 , 2010 2010 Citations: 126
Investigation of mechanical and radiation shielding characteristics of novel glass systems with the composition xNiO-20ZnO-60B2O3-(20-x) CdO based on nanometal oxides RM El-Sharkawy, KS Shaaban, R Elsaman, EA Allam, A El-Taher, ... Journal of Non-Crystalline Solids 528, 119754 , 2020 2020 Citations: 125
Assessment of natural radioactivity levels and radiation hazards for building materials used in Qassim area, Saudi Arabia A El-Taher Rom. J. Phys 57 (3-4), 726-735 , 2012 2012 Citations: 125
Distribution and environmental impacts of metals and natural radionuclides in marine sediments in-front of different wadies mouth along the Egyptian Red Sea Coast A El-Taher, HA Madkour Applied Radiation and Isotopes 69 (2), 550-558 , 2011 2011 Citations: 120
Radioactivity measurements and radiation dose assessments in soil of Al-Qassim region, Saudi Arabia A El-Taher, JH Al-Zahrani Indian J Pure Appl Phys 52 (3), 147-154 , 2014 2014 Citations: 111
Natural radioactivity levels in phosphate fertilizer and its environmental implications in Assuit governorate, Upper Egypt A El-Taher, S Makhluf Indian Journal of Pure & Applied Physics 48 (10), 697-702 , 2010 2010 Citations: 102
Environmental implications and spatial distribution of natural radionuclides and heavy metals in sediments from four harbours in the Egyptian Red Sea coast A El-Taher, HMH Zakaly, R Elsaman Applied Radiation and Isotopes 131, 13-22 , 2018 2018 Citations: 101
Assessment of natural radioactivity levels and radiation hazard indices for soil samples from Abha, Saudi Arabia AA Ibraheem, A El-Taher, MHM Alruwaili Results in Physics 11, 325-330 , 2018 2018 Citations: 99
Fabrication and characterization of phosphotungstic acid-Copper oxide nanoparticles-Plastic waste nanocomposites for enhanced radiation-shielding ME Mahmoud, RM El-Sharkawy, EA Allam, R Elsaman, A El-Taher Journal of Alloys and Compounds 803, 768-777 , 2019 2019 Citations: 97
An extended assessment of natural radioactivity in the sediments of the mid-region of the Egyptian Red Sea coast HMH Zakaly, MAM Uosif, SAM Issa, HO Tekin, H Madkour, M Tammam, ... Marine Pollution Bulletin 171, 112658 , 2021 2021 Citations: 94
Effect of γ-irradiation exposure on optical properties of chalcogenide glasses Se70S30− xSbx thin films M El-Hagary, M Emam-Ismail, ER Shaaban, A El-Taher Radiation Physics and Chemistry 81 (10), 1572-1577 , 2012 2012 Citations: 87
Natural radioactivity levels and heavy metals in chemical and organic fertilizers used in Kingdom of Saudi Arabia A El-Taher, SS Althoyaib Applied Radiation and Isotopes 70 (1), 290-295 , 2012 2012 Citations: 87
Radiological significance of beach sand used for climatotherapy from Safaga, Egypt MAM Uosif, A El-Taher, AGE Abbady Radiation Protection Dosimetry 131 (3), 331-339 , 2008 2008 Citations: 87
Gamma ray shielding and structural properties of iron alkali alumino-phosphate glasses modified by PbO A El-Taher, AM Ali, YB Saddeek, R Elsaman, H Algarni, KS Shaaban, ... Radiation Physics and Chemistry 165, 108403 , 2019 2019 Citations: 84
Radiological assessment of Abu-Tartur phosphate, western desert Egypt MAM Uosif, A El-Taher Radiation Protection Dosimetry 130 (2), 228-235 , 2008 2008 Citations: 84
