@article{gallala_hamdi_martinez-martinez_almousa_shkoukani_moneghan_fusi_essghaier_montacer_bourham_2021, title={Effect of F-Ba and Pb-Zn tailing on the mechanical and radiation shielding properties of cement mortars}, volume={271}, ISSN={["1879-0526"]}, DOI={10.1016/j.conbuildmat.2020.121603}, abstractNote={The use of mine waste and tailing in concrete and mortar has widely expanded in the past years. Several studies aim to contribute to the recovery of these rejects and preserve natural raw materials, on the other hand, to improve the physio-mechanical performance of concrete. In the present investigation, the impacts of Pb-Zn and F-Ba as fine aggregate replacement in mortar were analyzed. The outcomes indicated that substitution materials affect the mechanical strength and gamma radiation shielding properties of the mortar. In this regard, the compressive strength of samples made with substitutions of 5%, 10% and 20% of F-Ba tailings were slightly decreased with those of the reference test. However, the replacements with Pb-Zn tailings cause a significant strength decrease of mortar samples (from 68% to 94%). On the contrary, the flexural strength was improved adding one of these types of tailing. Concerning the absorption properties for gamma radiation, obtained results show that incorporation of these solid residues increases the attenuation of gamma rays. The mortars made with F-Ba tailings are more effective than others. The influence of tailings is significant mainly between 0.122 and 0.622 MeV and the highest attenuation is observed for Sample 5′ and 6′. This could be explained by the relative content of heavy minerals in each waste. Furthermore, the half thickness decreases with the increase of mine tailings percentage. The difference is more marked at high energies up to 0.15 MeV. Subsequently, the obtained materials could be utilized for shielding against gamma radiation.}, journal={CONSTRUCTION AND BUILDING MATERIALS}, author={Gallala, Wissem and Hamdi, Samira and Martinez-Martinez, Javier and Almousa, Nouf and Shkoukani, Ghada and Moneghan, Daniel and Fusi, Nicoletta and Essghaier, Mohamed and Montacer, Mabrouk and Bourham, Mohamed}, year={2021}, month={Feb} }
 @article{almousa_bourham_2020, title={Simulation of Erosion and Redeposition of Plasma Facing Materials Under Transient Plasma Instabilities}, volume={48}, ISSN={["1939-9375"]}, url={https://doi.org/10.1109/TPS.2020.2963844}, DOI={10.1109/TPS.2020.2963844}, abstractNote={Deposition of plasma energy during off-normal fusion reactor operational events delivers a transient heat flux of up to 100 MJ/m2 to the plasma-facing materials (PFMs). Understanding the exact material response to the extreme energy loading conditions plays a key role in establishing a realistic computational tool that simulates the fusion plasma–material interaction. Surface damage can occur due to vaporization, melting, spallation, and liquid splatter. However, splashing mechanisms such as boiling and splattering, which result from various liquid instabilities, appear to be the main mechanism contributing to the melt layer erosion. The primary focus of this article is melting and resolidification and the effect of redeposition of the eroded material on surface erosion. A set of selected PFMs was exposed to a plasma heat flux of up to 40 GW/m2 over a deposition duration of $200~\mu \text{s}$ . The source of the high energy plasma used in this article is the Surface InteRaction Experiment at North Carolina State (SIRENS) plasma source, which used to simulate disrupted plasma conditions. The underlying erosion mechanisms involved in the formation, ejection, and solidification of molten droplets are investigated using the basic plasma equations and a plasma fluid model implemented in the simulation code. The net erosion and redeposition thickness due to erosion of the vapor and melt layer have been evaluated post-plasma exposure and compared to the experimental measurements.}, number={6}, journal={IEEE TRANSACTIONS ON PLASMA SCIENCE}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Almousa, Nouf M. and Bourham, Mohamed}, year={2020}, month={Jun}, pages={1512–1518} }
 @article{sayyed_kaky_mhareb_abdalsalam_almousa_shkoukani_bourham_2019, title={Borate multicomponent of bismuth rich glasses for gamma radiation shielding application}, volume={161}, ISSN={0969-806X}, url={http://dx.doi.org/10.1016/j.radphyschem.2019.04.005}, DOI={10.1016/j.radphyschem.2019.04.005}, abstractNote={In this work, six borate-bismuth glasses have been synthesized using a conventional melt-quenching-aneling process with a composition of (80-x)B2O310ZnO10MgO-xBi2O3 where x = 10, 20, 30, 40, 50 and 60 mol%. The glasses were melted at 975 °C for 30 min and annealed at 300 °C for 5 h. Different physical properties of these glasses have been measured and estimated. X-ray diffraction has been utilized to investigate the structural nature of these glasses. Optical absorption and transmittance spectra have been measured for all samples in the range of 300–800 nm at room temperature. The cutoff wavelength of all glass samples was determined. In addition, the radiation shielding characterization for the glass samples was done by calculating the linear and mass attenuation coefficients, mean free path, and half value layer of the photon energy ranges between 0.015 and 15 MeV using MicroShield. It was found that the glass with the highest Bi2O3 content showed the best performance in attenuating gamma radiation by exhibiting the highest linear attenuation coefficient and both lowest mean free path and half value layer due to its high density of 7.107 g/cm3.}, journal={Radiation Physics and Chemistry}, publisher={Elsevier BV}, author={Sayyed, M.I. and Kaky, Kawa M. and Mhareb, M.H.A. and Abdalsalam, Alyaa H. and Almousa, Nouf and Shkoukani, Ghada and Bourham, Mohamed A.}, year={2019}, month={Aug}, pages={77–82} }
 @article{almousa_bourham_2019, title={Performance of Capillary Plasma Source With Combustible Materials}, volume={47}, ISSN={0093-3813 1939-9375}, url={http://dx.doi.org/10.1109/TPS.2019.2940429}, DOI={10.1109/TPS.2019.2940429}, abstractNote={Application of an energetic material (EM) in a liquid or gaseous form to electrothermal (ET) plasma discharge systems can provide an energetic plasma jet that has desirable parameters for launching applications. In this energetic ET concept, the EM is basically injected into the plasma source that is operated in an ablation-free regime. The discharge and EM combustion processes have been simulated using the ETFlowCom code, which is an in-house developed energetic ET plasma model. In this article, the ETFlowCom code is used to predict the energetic plasma jet parameters such as temperature, pressure, heat flux, and exit velocity. Different computational case studies have been conducted using a variety of EM mixtures. The simulation results show that the generated energetic plasma jet has the density on the order of 10271/m3, kinetic pressure on the order of hundreds of MPa, and an exit velocity that can reach up to 6 km/s. These parameters are found to be functions of the EM type and the mixing ratio as well. The jet parameters show strong potential for launching applicability.}, number={11}, journal={IEEE Transactions on Plasma Science}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Almousa, Nouf M. and Bourham, Mohamed}, year={2019}, month={Nov}, pages={4873–4878} }
 @article{sayyed_mhareb_abbas_almousa_laariedh_kaky_baki_2019, title={Structural, optical, and shielding investigations of TeO2-GeO2-ZnO-Li2O-Bi2O3 glass system for radiation protection applications}, volume={125}, ISSN={["1432-0630"]}, DOI={10.1007/s00339-019-2709-3}, number={6}, journal={APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING}, author={Sayyed, M. I. and Mhareb, M. H. A. and Abbas, Zinah Yaseen and Almousa, Nouf and Laariedh, Farah and Kaky, Kawa M. and Baki, S. O.}, year={2019}, month={Jun} }