Prof. Mohamed Salem Badawi
Alamein International University/Alexandria University, Egypt
Title: Gamma-ray Detectors Efficiency Calculations Using Geometry, Modeling and Numerical Simulation Techniques
Abstract:
The activity measurements of the artificiality and naturally occurring radionuclides have a great impact on life and the environment. This requires a γ-spectrometer of well-known efficiencies over a wide range of photon energies. The present work provides theoretical modeling approaches to determine the efficiency of the γ-ray detectors for different detector geometries with good accuracy to determine the concentrations of either naturally occurring or artificially prepared radionuclides samples. The theoretical approach to the detector efficiency is based on the numerical simulation techniques, the effective solid angles, the self-absorptions of the source matrix, the attenuation by the source container, and the detector housing materials. While, the calibration process can be done using radioactive sources in different shapes and different shapes like [Point, Disk, Cylindrical, Spherical, Parallelepiped and Marinelli … etc ], that turn out photons with a broad range of energies. Also, Such a theoretical approach can be verified and refined using experimental measurements. Trying to know the full-energy peak efficiency for a specific source-to-detector arrangement which is often required in various fields of research and applications as analysis of the nuclear waste drums and especially the environmental samples, where both require modeling because it is not practical easy to prepare a standard, that matches the physical and nuclear properties of every waste or environmental samples.
Keywords: Detector Efficiency, Geometry, Modeling, and Numerical Simulation Techniques.
Biography:
Dr. Badawi completed his Ph.D. in radiation physics in 2010 as a fellowship system between Alexandria University (Egypt) and the Belgian Nuclear Research Centre (SCK.CEN) (Belgium).
He has an active license as an expert in radiation protection from the Nuclear & Radiological Regulatory Authority-Egypt. He also renews, established, and managed the radiation physics research laboratory in the faculty of science, Alex Univ and faculty of science, BAU as well.
Dr. Badawi held several positions:
• Director of Academic Programs, Faculty of Science, Alamein International University - New Alamein, Egypt since 2022 up to now.
• Head of Physics Department, Faculty of Science, Beirut Arab University, Lebanon since 2020-2022.
• Editor and a Reviewer in 111 international Journals.
• Supervisor for 18 Ph.D. and 33 M.Sc. Thesis.
Throughout his career, he had several running international projects in the radiation field with Russia, Montenegro, Saudi Arabia, Lebanon, India, Bulgaria and Egypt.
Dr. Badawi research interests focus on the field of radiation physics, especially Gamma-ray spectroscopy, radiation detection, and measurement “Calibration Techniques and Protection”. He participated in 24 international conferences and he has published over 115 scientific professional papers. He received more than 1708 citations (h-index = 25).