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S
Shady, H. A., Study of elastic scattering of protons on nuclei at intermediate energy, , Giza, Cairo university, 1993.
Shady, P. H. A., P. E. H. Amin, and P. W. Seif, "The impact of using different fuel densities on the neutronic parameters of Material Test Research (MTR) reactor core", International Journal of Scientific & Engineering Research, vol. 8, issue 9, pp. 475 - 490, 2017. paper_4_impact_of_desnities.pdf
R
R O Abdel Rahman, Z. E. D. H. A. Abidin, and H. Abou-Shady, "Cesium binding and leaching from single and binary contaminant cement–bentonite matrices", Chemical Engineering Journal, vol. 245, pp. 276-287, 2014. AbstractWebsite

Abstract Binding mechanisms and leaching characteristics of cesium from different cement–
bentonite immobilization matrices were investigated. The effect of Sr presence as a
competitive contaminant in the matrices was studied by investigating the binding and
leaching mechanisms in binary contaminant matrices that contains both Cs and Sr solutions.
Binding investigations aimed to trace Cs binding mechanisms by calculating the distribution
of contaminant and major structural elements aqueous complexes in the mixing solution ...

R O Abdel Rahman, D. H. A. Z. E. Abidin, and H. Abou-Shady, " Assessment of strontium immobilization in cement–bentonite matrices", Chemical Engineering Journal, vol. 228, pp. 772-780, 2013. AbstractWebsite

The feasibility of immobilizing strontium in cement–bentonite matrices was investigated by studying the effect of mineralogical phase development on mechanical and containment performances. Within this context, the chemical composition and physical properties of bentonite were determined. Different cement–bentonite waste matrices were prepared and analyzed using XRD technique to trace the changes in phases during the curing period. The mechanical performance of these matrices was evaluated by measuring the compressive strength throughout their curing period and the containment performance was determined by conducting long-term static leaching test then the experimental results were checked against some regulatory limits. The results indicated that the presence of strontium and bentonite did not lead to formation of new hydrated phases. The mechanical performance of the matrices is acceptable and the enhanced compressive strength was attributed to the progression in the formation of cement hydrated phases and the pozzolanic reaction between bentonite and lime in cement–bentonite matrices. The speciation data and phase structures analysis indicated that Sr2+ containment in cement might be due to Ca substitution in Ettringite structure and cations exchange on Montmorillonite lattice. The mathematical analysis of the long-term leaching results indicated that strontium leaching resulted from a combination of first order reaction and diffusion mechanisms.

M
Mokhtar, M., E. M. Attalla, H. Abou-Shady, N. A. Deiab, and A. Amin, "Comparative dosimetry of forward and inverse treatment planning for Intensity-Modulated Radiotherapy of prostate cancer", IOSR Journal of Applied Physics, vol. 7, issue 6, pp. 97-106, 2015.
abdul Magead, I., Studies in differential cross section for reactions involving Deformed Nuclei, , Giza, Cairo university, 2009.
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Ismail, M., M. M. Osman, E. H. Gebaly, and H. Abou-Shady, "Effect of β 6 deformation parameter on fusion cross-section and barrier distribution", Acta Physica Hungarica Series A, Heavy Ion Physics, vol. 21, issue 1, pp. 27-38, 2004. AbstractWebsite

The effect of hexacontatetrapole deformation parameter on both the fusion cross-section and the barrier distribution have been studied for U238 + O16 nuclear pair using microscopically derived heavy ion (HI) potential. A method was described to extend the calculation of HI potential between two spherical nuclei using density dependent finite range NN forces to the spherical-deformed interacting pair. Density dependent and density independent effective NN forces were used in the generalized double folding model to derive the HI potential. We found that positive β 6 has large effect on both the fusion cross-section and the barrier distribution in the presence of a small value of hexadecapole deformation parameter β 4. In this case the fusion cross-section is less sensitive to the negative value of β 6. In the presence of a large value of β 4, negative and positive β 6 values affect the fusion cross-section and have a small effect on the barrier distribution.

Ismail, M., M. M. Osman, E. H. Gebaly, and H. Abou-Shady, "Orientation and deformation dependence of the reaction cross-section for a deformed target nucleus", Modern Physics Letters A, vol. 18, issue 1, pp. 57-64, 2003. AbstractWebsite

The optical limit approximation to Glauber theory was used to calculate the reaction cross-section, σR, for a deformed target nucleus. A method is presented to include both density dependence of NN reaction cross-section and higher order deformations of the target nucleus. We studied orientation, energy and deformation dependence of σR for C12–N17 and C12–U238 interacting pairs. We found that the orientation dependence of σR for the heavy target U238 depends on the value and sign of hexadecapole deformation and it is more than 2.2 times compared to the light deformed target nucleus N17. The presence of hexadecapole deformation does not affect the value of σR averaged over all orientation of the target nucleus. A geometrical model was proposed to account for the orientation dependence of σR. We found that the error in this model is less than 10%.

Ismail, M., A. Y. Ellithi, and H. Abou-Shady, "Effect of finite range of the N N force and N N cross section on reaction cross section for neutron rich nuclei", PHYSICAL REVIEW C, vol. 71, issue 2, 2005. AbstractWebsite

The reaction cross section (σR) is calculated using the optical limit of the Glauber theory. A density-dependent effective nucleon-nucleon (NN) cross section σNN is considered. Finite and zero range NN interactions are studied. The effect of finite range and an appropriate local density can increase σR up to 20% compared to the zero range at constant density (0.16fm−3), while a zero range calculation with free NN cross section increases σR up to 13%. These factors affect the values of the rms radii for neutron rich nuclei extracted from σR.

Ismail, M., W. M. Seif, A. Bakry, and H. Abou-Shady, "Study of Coulomb interaction for two diffuse spherical-deformed nuclei", Physics of Atomic Nuclei, vol. 69, issue 9, pp. 1463-1471, 2006. AbstractWebsite

The Coulomb interaction for a spherical—deformed interacting pair is derived assuming realistic nuclear charge distributions. The effect of a finite diffuseness parameter is described either by the folding product of spherical or deformed sharp-surface distribution and a spherical short-range function or by using a Fermi two-parameter distribution function. The approximate solutions obtained using these categories of charge distributions are then compared to the numerical solution obtained within the framework of the double-folding model. We found that the finite surface diffuseness parameter affects slightly the inner region of the total Coulomb potential, while it produces large errors in calculating the Coulomb form factors used frequently in nuclear reactions and fusion numerical codes.

Ismail, M., A. Y. Ellithi, and H. Abou-Shady, "EFFECT OF ISO-SPIN AVERAGING AND FINITE RANGE OF THE NN FORCE ON REACTION CROSS SECTION FOR NEUTRON RICH NUCLEI", A new era of nuclear structure physics. Proceedings of the international symposium (NENS03): IAEA - world scientific, pp. 330-331, 2004. Abstract

The optical limit to Glauber theory is used to calculate the reaction cross section, σR, for neutron rich nuclei. In-medium and iso-spin dependence of the effective nucleon-nucleon (NN) reaction cross-section, σNN, are treated correctly assuming both finite and zero range NN interaction. We find that the combined effect of iso-spin dependence and finite range of NN force can increase up to 20% for neutron rich nuclei compared to σR calculated using zero range approximation and constant matter density value 0.16 fm-3 in σNN. The maximum percentage increase is reduced to 13% compared with σR based on free NN cross section

Ismael, E., M. M. Y. Hassan, S. Ghazal, and H. Abou-Shady, "Elastic scattering of p-4He and p-12C at intermediate energies", Egyptian Journal of Physics, vol. 30, issue 3, pp. 317-330, 1999.
Ibrahim, H. F., H. Abou-Shady, and S.M.M.Hozayen, "Design and modeling of Medical linear accelerators using the Geant4/GATE Platform", Journal of Nuclear Technology in Applied Science, vol. 5, issue 4, pp. 241-252, 2018.
H
Hamadiche, M., and H. Abou-Shady, "Optical fiber instability during coating process", Journal of Fluids and Structures, vol. 22, issue 5, pp. 599 - 615, 2006. AbstractWebsite

In the present work, we study the stability of a system designed for the coating of optical fiber. This is achieved by studying the stability of the flowing resin in the die while coupled with a viscoelastic optical fiber. We develop a numerical code based on a sixth-order compact finite-difference method in order to solve the two-dimensional Navier–Stokes equations. We show that there is a bifurcation flow for a given value of the Reynolds number, wherever the vibration of the optical fiber has been experimentally observed. The stability of the resulting flow, coupled with a nonrigid optical fiber, is considered. Two-dimensional and three-dimensional stability analyses were made. The system was found to be subjected to two kinds of instability induced by two distinguishable groups of modes. For an optical fiber with a small radius, we assume that the preceding vibration may not be the only cause of the irregularity in the coating thickness. Therefore, a model taking into account the deformation of the liquid resin surface, under the action of the surface-tension forces, before resin solidification, and after leaving the die, is proposed. This model assumes that the liquid layer is subjected to surface-tension and gravity forces. It was found that the dynamic equation depends on two dimensionless parameters. It is found that the surface of the fiber has a wavy form. The length of the wave depends on the two dimensionless parameters. Our work shows qualitative agreement with the experimental results without adjusting arbitrary constants.

G
Guirgis, O. W., S. A. Elawam, W. M. Morsi, and H. A. M. Shady, "Optical properties study of PMMA/PbO(NP's) composites films", Materials science, vol. 14, issue 12, pp. 471-483, 2016. optical_prop.pdf
E
Elawam, S. A., O. W. Guirguis, W. M. Morsi, and H. M. Abou-Shady, "Structural Configuration and Thermal Analyses of Composite Films of Poly (methyl methacrylate)/Lead Oxide Nanoparticles", SSRG International Journal of Applied Physics (SSRG-IJAP), vol. 3, issue 6, pp. 1- 8, 2016.
Elawam, S. A., Radiation protection by using polymer composites material, , Giza, Cairo university, 2017.
B
Bakry, A. S. E., Coulomb interaction for deformed target nucleus, , Cairo- Giza, Cairo University, 2005.
A
AZIZ, R. A. N. I. O. S. A. M. A. A., E. H. AMIN, and H. Abou-Shady, "THE IMPACT OF GRAPHITE REFLECTOR MODIFICATION ON NEUTRONIC PARAMETERS OF A TYPICAL MTR TYPE RESEARCH REACTOR", Asian Academic Research Journal of Multidisciplinary, vol. 1, issue 26, pp. 91-108, 2014. AbstractWebsite

Abstract
Neutronic analysis of a typical swimming pool type research reactor, Pakistan research
Reactor-1 (PARR-1), was carried out for determine the effect of graphite reflector
configuration modification as a way to optimize the neutron flux in the irradiation positions.
Standard computer codes WIMSD and CITVAP were employed to calculate core excess
reactivity, neutron fluxes, power distribution, and burn-up distribution. A comparison
between four different core configurations is presented in this article.

Aziz, R. O. A. A., OPTIMIZATION of MTR reactor core fuel loading for isotope production, , Cairo- Giza, Cairo University, 2014.
galal Amin, D., Biophysical studies of melanin nano particles as radioprotectors, , Cairo, Cairo University, 2014.
Amin, D. G., M. M. Rageh, R. H. El-Gebaly, and H. Abou-Shady, "Effect of Melanin nanoparticles (MNPs) on radiation-induced cytotoxicity in Chinese hamster ovary cells", Egyptian journal of Biophysics, vol. 18, issue 1, pp. 10, 2013. effect_of_melanin_nanoparticles_mnps_on_radiation-induced_cytotoxicity.pdf
Amin, D. G., M. M. Rageh, R. H. El-Gebaly, and H. Abou-Shady, "Melanin Nanoparticles (MNPs) provide protection against whole-body ɣ-irradiation in mice via restoration of hematopoietic tissues", Molecular and Cellular Biochemistry, vol. 396, issue 554, 2014. AbstractWebsite

During radiotherapy, ionizing irradiation interacts with biological systems to produce free radicals, which attack various cellular components. The hematopoietic system is easily recognized to be radiosensitive and its damage may be severe. Melanin nanoparticles (MNPs) act as free radical scavengers prepared by polymerization of dopamine. In this study, a total of 110 male BALB/C mice were divided into five equal groups. Each group contained 22 mice. Mice of group A did not receive MNPs or irradiation (control group), group B was injected intraperitoneally (i.p.) with 50 mg/kg MNPs. Mice of group C and D were exposed to a dose of 7 Gy ɣ-irradiation and injected with the same dose of MNPs as in group B either 30 min pre- or post-irradiation, and group E was exposed to a dose of 7 Gy ɣ-irradiation only. The impact of MNPs on peripheral blood, spleen, and DNA damage induced by irradiation was evaluated by blood count, histopathology of the spleen, and comet assay for the DNA in the bone marrow at 1, 4, 8, and 12 days post-irradiation. Results of group E compared with control group (A) showed a significant depression in complete blood count. Additionally, histopathological observation showed the absence of megakaryocytes with delayed time post-irradiation, deposition of eosinophilic protein of their spleen appeared, as well as a remarkable decrease in spleen size was observed. Moreover, ɣ-irradiation-induced DNA damage as can be inferred from a significant increase by about 5–10 folds in all comet parameters (% of DNA, tail length, tail moment, and olive moment) in the DNA of the bone marrow. In contrast, pre-post treatment with MNPs protected hematopoietic tissues against radiation damage, and therefore, enhanced the survival of mice with 40 % in groups (C&D) compared with 10 % to group (E) till 30 days post-irradiation. In conclusion, these results demonstrated that synthetic MNPs provide significant radioprotection to the hematopoietic tissues.

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