Dr. Mohamed Mitwalli is interested in nuclear and radiation sciences and their various applications (radiation protection, nuclear technology, isotope dating, radioecology, geochemical, NAA, shielding, MCNP, SSNTDs, and radionuclide identification). Mitwalli also has extensive scientific cooperation within local and international research groups.
EDUCATION
PhD Nuclear and Radiaton Physics
RESEARCH, TEACHING, or OTHER INTERESTS
Nuclear and High Energy Physics, Radiation, Geophysics, Nuclear Energy and Engineering
Radioanalytical Assessment and Mineral Chemistry Investigations in the Pegmatites of Eastern Desert, Egypt: Implications for Mining and Radiation Protection Mohamed M. Ghoneim, Mohamed Mitwalli, Hanaa A. El-Dokouny, Mai A. El-Lithy, Maher Dawoud, et al. Geosciences Switzerland, 2026 This study is carried out to investigate the radiological characteristics and mineralogical controls of natural radioisotopes (238U, 226Ra, 232Th, and 40K) in granitic pegmatites from Abu Zawal Area (AZA) in the Eastern Desert of Egypt. The analyzed pegmatites, containing thorite, zircon, monazite, ferrocolumbite, and fergusonite, exhibit exceptionally high radioactivity concentrations of 238U ≤ 568; 232Th ≤ 674; 226Ra ≤ 170 (Bq kg−1), significantly exceeding the world average permissible limits (35, 30, 30, and 400 Bq kg−1 for 238U, 226Ra, 232Th, and 40K, respectively). Comprehensive radiological assessment reveals severely elevated radiological impact associated with Raeq ≤ 1243 (Bq kg−1) and hazard indices (Hex≤ 3.36; ELCR ≤ 12.2 × 10−3) surpassing international safety thresholds (Hex ≤ 1; ELCR ≤ 1 × 10−3). The observed disequilibrium between 238U and 226Ra (with 226Ra activities approximately half those of 238U) is attributed to the geochemical mobility of radium and potential selective leaching during late-stage hydrothermal alteration, while the overall enrichment of the uranium series over the thorium series is linked to the predominance of uranium-bearing minerals like zircon and fergusonite in these pegmatites. Mineralogical analysis demonstrates distinct radiation patterns: thorite and monazite dominate Th-derived gamma radiation and radon/thoron exhalation, while zircon and fergusonite control U enrichment and decay chain disequilibrium. Notably, nominally low-activity minerals like ferrocolumbite contribute to localized radiation hotspots through U/Th co-concentrations. The calculated absorbed dose rates ranged from 182 to 978 (nGy h−1) and annual effective doses show extreme spatial variability correlated with Th-rich mineral assemblages.
Nuclear track autoradiography for radon-related radiobiological hazards in Abu-Sannan Petroleum Area, Egypt Aya Abdelrazk, Hagar Ahmed, Ali El-Farrash, Mohamed Mitwalli Scientific Reports, 2025 Abu-Sannan Petroleum Area (ASPA) is situated in Egyptian Western Desert and presents a suitable site for oil exploration. This study aimed to evaluate the radiological hazards linked to technologically enhanced naturally occurring radioactive materials (TENORM), particularly Radium (²²⁶Ra) and Radon (²²²Rn), in the General Petroleum Y-Field (GPY) situated in the northeastern area of ASPA. The study was examined significant deficiencies in radiological monitoring by evaluating ²²²Rn dynamics, geological correlations, and related radiation hazards. CR-39 nuclear track detector was used to examine 23 sedimentary samples for ²²²Rn and ²²⁶Ra radioactivity concentration. The samples under study were taken from depths 100 to 2600 m ASPA. A radioecological assessment of shale, limestone, and sandstone formations was also conducted. Results showed that the radioactivity concentrations of ²²²Rn and ²²⁶Ra increased with depth, reaching a maximum of 1906.85 ± 194.52 Bq.m −3 and 89.99 ± 1.69 Bq.m −3 at 2600 m, respectively. The value of ²²²Rn and ²²⁶Ra were higher than the limits set by the IAEA and UNSCEAR. The annual effective doses (AED) varied from 7.41 ± 4.82 to 48.11 ± 12.27 m.Sv.y − 1 , exceeding the international safety threshold of 1–10 m.Sv.y − 1 . Increased hazards were observed in deeper layers, notably the Bahariya Sandstone, due to the presence of uranium-rich rocks and highly porous matrices. Radiometric and geological analyses indicated that shale strata contain ²²⁶Ra but cracked limestone and sandstone formations permit the migration of ²²²Rn. Principal component analysis (PCA) revealed significant correlations among ²²²Rn concentration, exhalation rates, and AED, underscoring the lithological influence on radiation hazards. The results highlight considerable occupational health hazards in ASPA, necessitating improved radiation protection measures and ongoing surveillance to reduce lung cancer risks associated with prolonged ²²²Rn exposure, in accordance with WHO guidelines. This study offers essential data to inform regulatory strategies in petroleum-producing areas with similar geological characteristics and radiation protection protocols.
Corrigendum to “Radioanalysis of radon in dietary legumes using polymeric nuclear autoradiographic techniques”[J. Food Compos. Anal. 147 (2025) 108047] DH Shabaan, N Alsaif, SA Abd El-Azeem, E El-Bialy, EH EL-Araby, ... Journal of Food Composition and Analysis, 109226 , 2026 2026
Elasto-Mechanical and Nuclear Shielding Characterization of La2O3 based Boro-Silicate Glasses for Radiological Protection A Saleh, MI Sayyed, K Said, KT Osman, R Touti, TY Wais, SM Tajudin, ... Radiation Physics and Chemistry, 113950 , 2026 2026
Recycling solid waste to develop a novel and sustainable glass shielding for nuclear and radiation applications M Mitwalli, M Humaid, J Asad, MHA Mhareb, A AboAlatta, Y Alajerami, ... Scientific Reports , 2026 2026 Citations: 1
Efficient elimination and naked-eye detection of trace radioactive iodide by silver-decorated oxygen vacancy-rich TiO2-x derived from MIL-125 KW Chen, C Wu, MJ Zhang, M Mitwalli, YY Liu, HX Wang, TS Li, Y Yang Separation and Purification Technology, 137630 , 2026 2026
IRPA Bulletin 49 M Mitwalli, M Gomaa INTERNATIONAL RADIATION PROTECTION ASSOCIATION 49 (DOI: 10.13140/RG.2.2 … , 2026 2026
Short-term radon exhalation and dose assessment of marble and granite utilized as construction materials in Saudi Arabia T Al-Abdullah, MA Baloch, F Liadi, M Mitwalli The European Physical Journal Plus 141 (3), 317 , 2026 2026
Radiometric and Statistical Multivariate for Surveillance Radioactivity in Infant and Adult Powdered Milk: Case of Public Health and Food Safety EH EL-Araby, A Azazi, DH Shabaan, YA Baqir, R Hassani, M Mitwalli Food Control, 112035 , 2026 2026
Radioanalytical Assessment and Mineral Chemistry Investigations in the Pegmatites of Eastern Desert, Egypt: Implications for Mining and Radiation Protection MM Ghoneim, M Mitwalli, HA El-Dokouny, MA El-Lithy, M Dawoud, YY Liu, ... Geosciences 16 (2), 69 , 2026 2026
Integration between radiation shielding performance, structural evolution, and mechanical features of co-doped sodium phosphate glasses NA Abdelhakim, RM Shalaby, AM Abdelghany, M Mitwalli, AH El-Farrash, ... Scientific Reports , 2026 2026 Citations: 9
IRPA Bulletin 48 M Mitwalli, M Gomaa INTERNATIONAL RADIATION PROTECTION ASSOCIATION 48 (DOI: 10.13140/RG.2.2 … , 2026 2026
Synthesis and Characterization of a Novel BT-Cz-3HT2 Donor-Acceptor Conjugated via Oxidative Polymerization: Potential for Optoelectronic Applications E El-Bialy, A Azazi, EH El-Araby, R Hassani, DH Shabaan, S Fezai, ... Synthetic Metals, 118066 , 2025 2025
Nuclear track autoradiography for radon-related radiobiological hazards in Abu-Sannan Petroleum Area, Egypt A Abdelrazk, H Ahmed, A El-Farrash, M Mitwalli Scientific Reports 15 (1), 39573 , 2025 2025 Citations: 2
IRPA Bulletin 47 M Mitwalli, M Gomaa INTERNATIONAL RADIATION PROTECTION ASSOCIATION 47 (DOI: 10.13140/RG.2.2 … , 2025 2025
Radioanalysis of radon in dietary legumes using polymeric nuclear autoradiographic techniques DH Shabaan, N Alsaif, SA Abd El-Azeem, E El-Bialy, EH EL-Araby, ... Journal of Food Composition and Analysis, 108047 , 2025 2025 Citations: 2
Assessment of radon in traditional building materials using polymeric nuclear track detector HA Yousef, KA Korany, MA Salama, M Mitwalli Radiation Effects and Defects in Solids 180 (3-4), 304-313 , 2025 2025 Citations: 7
IRPA Bulletin 45 M Mitwalli, M Gomaa INTERNATIONAL RADIATION PROTECTION ASSOCIATION 45 (DOI: 10.13140/RG.2.2 … , 2025 2025
Nuclear radiation attenuation properties of PbO-doped polymeric composites HA Yousef, AM Abdelghany, IM Nabil, MS Mitwalli Journal of Materials Science: Materials in Electronics 36 (8), 457 , 2025 2025 Citations: 15
Author Correction: Comprehensive study for radiation shielding features for Bi2O3–B2O3–ZnO composite using computational radioanalytical Phy-X/PSD, MCNP5, and SRIM software YS Alajerami, MHA Mhareb, MI Sayyed, MK Hamad, F Kodeh, M Rashad, ... Scientific Reports 15, 4527 , 2025 2025 Citations: 1
Author Correction: Comprehensive study for radiation shielding features for Bi YS Alajerami, MHA Mhareb, MI Sayyed, MK Hamad, F Kodeh, M Rashad, ... 2025
A good balance between the efficiency of ionizing radiation shielding and mechanical performance of various tin-based alloys: comparative analysis NA Abdelhakim, A Saleh, M Mitwalli, AH El-Farrash, RM Shalaby Radiation Physics and Chemistry 226, 112155 , 2025 2025 Citations: 42
MOST CITED SCHOLAR PUBLICATIONS
IRPA Bulletin 32 M Mitwalli, M Gomaa INTERNATIONAL RADIATION PROTECTION ASSOCIATION 32 (DOI: 10.13140/RG.2.2 … , 2022 2022 Citations: 47
A good balance between the efficiency of ionizing radiation shielding and mechanical performance of various tin-based alloys: comparative analysis NA Abdelhakim, A Saleh, M Mitwalli, AH El-Farrash, RM Shalaby Radiation Physics and Chemistry 226, 112155 , 2025 2025 Citations: 42
Thermal, and radiation shielding properties of SrO–B2O3–TeO2–ZnO–Bi2O3 glasses doped with Dy2O3 HA Thabit, YSM Alajerami, MHA Mhareb, S Hashim, M Mitwalli Ceramics International 50 (17), 29776-29786 , 2024 2024 Citations: 25
Comprehensive study for radiation shielding features for Bi 2 O 3 –B 2 O 3 –ZnO composite using computational radioanalytical Phy-X/PSD, MCNP5, and SRIM … YS Alajerami, MHA Mhareb, MI Sayyed, MK Hamad, F Kodeh, M Rashad, ... Scientific Reports 14 (1), 17700 , 2024 2024 Citations: 19
Environmental Radioactivity of Radon and its Hazards in Hamash Gold Mine, Egypt GM Saleh, HA Yousef, MES Mitwalli, AHE farrash Arab Journal of Nuclear Sciences and Applications 52 (4), 190-196 , 2019 2019 Citations: 16
Nuclear radiation attenuation properties of PbO-doped polymeric composites HA Yousef, AM Abdelghany, IM Nabil, MS Mitwalli Journal of Materials Science: Materials in Electronics 36 (8), 457 , 2025 2025 Citations: 15
Radon measurement and radiological dose assessment from terrestrial rocks using Solid-State nuclear track detectors M MITWALLI, W BADWAY, H YOSEF, S SALAMA, G SALEH, ... Arab Journal of Nuclear Sciences and Applications 56 (1), 1-8 , 2023 2023 Citations: 13
Elemental distribution patterns in rock samples from Egypt using neutron activation and complementary X-ray fluorescence analyses W Badawy, I Silachyov, A Dmitriev, S Lennik, G Saleh, M Mitwalli, ... Applied Radiation and Isotopes 202, 111063 , 2023 2023 Citations: 12
Evaluation of radon radioactivity and radiological impact by using Solid-State nuclear track detector for Erediya younger granites of central Eastern desert in Egypt M MITWALLI, F Qabeeli, A El-Khatib, M Abaas, G Saleh Arab Journal of Nuclear Sciences and Applications 56 (3), 81-94 , 2023 2023 Citations: 10
Integration between radiation shielding performance, structural evolution, and mechanical features of co-doped sodium phosphate glasses NA Abdelhakim, RM Shalaby, AM Abdelghany, M Mitwalli, AH El-Farrash, ... Scientific Reports , 2026 2026 Citations: 9
Environmental Radioactivity Monitoring Using High Resolution Gamma-ray Spectrometer for Lake Manzala in Egypt M Mitwalli, C DULAMA, M SALLAH, D CHIRLEŞAN, AH EL-FARRASH Arab Journal of Nuclear Sciences and Applications 55 (4), 139-149 , 2022 2022 Citations: 9
Radionuclides determination and computing radiobiological dose for TENORM exposure using NaI (Tl) Gamma-ray spectrometer M MITWALLI, F Qabeeli, A El-Khatib, M Abbas, G Saleh Arab Journal of Nuclear Sciences and Applications 56 (5), 114-126 , 2023 2023 Citations: 8
Assessment of radon in traditional building materials using polymeric nuclear track detector HA Yousef, KA Korany, MA Salama, M Mitwalli Radiation Effects and Defects in Solids 180 (3-4), 304-313 , 2025 2025 Citations: 7
Neutron activation analysis for geochemical characterization of rocks from gold mines in Egypt WM Badawy, M Mitwalli, AY Dmitriev, O Chepurchenko, G Saleh, ... Applied Sciences 13 (7), 4564 , 2023 2023 Citations: 6
Nuclear track autoradiography for radon-related radiobiological hazards in Abu-Sannan Petroleum Area, Egypt A Abdelrazk, H Ahmed, A El-Farrash, M Mitwalli Scientific Reports 15 (1), 39573 , 2025 2025 Citations: 2
Radioanalysis of radon in dietary legumes using polymeric nuclear autoradiographic techniques DH Shabaan, N Alsaif, SA Abd El-Azeem, E El-Bialy, EH EL-Araby, ... Journal of Food Composition and Analysis, 108047 , 2025 2025 Citations: 2
Implementation of “CODE SEPSIS” for septic patients at Al Wakra Hospital: A practice improvement initiative H Abdelaziz, M Khatib, R El Sayed, M Khaled, R Al Anany, W Smidi, ... Journal of Emergency Medicine, Trauma and Acute Care 2016 (2), 152 , 2016 2016 Citations: 2
Recycling solid waste to develop a novel and sustainable glass shielding for nuclear and radiation applications M Mitwalli, M Humaid, J Asad, MHA Mhareb, A AboAlatta, Y Alajerami, ... Scientific Reports , 2026 2026 Citations: 1
Author Correction: Comprehensive study for radiation shielding features for Bi2O3–B2O3–ZnO composite using computational radioanalytical Phy-X/PSD, MCNP5, and SRIM software YS Alajerami, MHA Mhareb, MI Sayyed, MK Hamad, F Kodeh, M Rashad, ... Scientific Reports 15, 4527 , 2025 2025 Citations: 1
Correlation Influence and Quantification of Grain Size on Radon Radioactivity for (Ca2SiO4) Ore Rocks M MITWALLI, A Abdelrazek Arab Journal of Nuclear Sciences and Applications 57 (1), 41-50 , 2024 2024 Citations: 1