Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101RADIOLOGICAL IMPACT OF NATURAL RADIOACTIVITY IN WHITE GRANITE AT UM BAANIB AREA, SOUTHEASTERN DESERT, EGYPT185547410.21608/ajnsa.2019.5051.1117ENMahmoud AhmedMahmoudNuclear Materials AuthorityEman SamirAbd El-HalimFaculty of Women for Arts, Science and Education, Ain Shams University, Cairo, EgyptJournal Article20180906In this study, the ground spectrometric surveying shows the distribution of uranium, thorium and their ratios in the studied white granite, which reflect the addition amount of uranium to the granite from the surrounding rocks.<br /> The activity concentrations of the natural radionuclides were measured using a high-purity germanium detector (HPGe). The average activity concentration of 235U, 238U, 226Ra, 232Th and 40K was found as (27.01, 83.29, 90.08, 11.59 and 490.75 Bq/Kg) for nine white granite samples obtained from the studied area. <br /> The radium equivalent (Raeq) in Bq/Kg, external hazard index (Hex), radioactivity level index (I_γ), the absorbed dose rate (D) and the annual effective dose (AED) in outdoor environment were estimated. The annual effective dose was found to be high for all samples due to high concentration of 238U in the area under investigation which represent radiological risk for the health of population.<br /> The concentrations of major oxides (%) and trace elements (ppm) have been determined by X-ray fluorescence spectrometry. High average value for Na2O and Al2O3 which are useful in ceramics industry, high average value of Sr and Ba are useful to many important industries.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Physical and spectral studies of Mg-Zn ferrite prepared by different methods9186516610.21608/ajnsa.2019.11102.1195ENAhmedHenaishPhysics Department, Faculty of Science, Tanta University, EgyptJournal Article20190325Nano particle of Magnesium Zinc ferrite (Mg1-xZnxFe2O4, where x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) have been prepared by using the standard ceramic technique and mechanical ball milling method. X-ray diffraction (XRD), (IR) spectra, and scanning electron microscope (SEM)were carried out to characterize the prepared samples. Single phase cubic spinel structure with a main peak (311) at 2Ɵ = 34o was observed for all studied samples. The crystallite size was found to be within the range 37–65 nm. From IR spectra, the absorption bands at 605 cm-1 (ν1) and 435 cm-1 (ν2) were observed and are assigned to tetrahedral (A site) and octahedral (B site) groups complex respectively. Morphological study which were determined by scanning electron microscopy (SEM) which shows grains agglomerated with different shapes and sizes. The initial permeability was measured at different frequencies. The fast decrease in initial permeability µi at Tc is a good reason to be a very strong candidate for magnetic switch devices.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Study of The Leachability and Solubility of Some Radionuclides in The Waste Repository19326547110.21608/ajnsa.2019.10208.1183ENRasha SamirZakyENRAAJournal Article20190303The safety of radioactive wastes in the repository depends on its capacity to confine radioactivity from being released to the biosphere. The most likely process that can lead to the release of radionuclides from a repository is the transport by groundwater. The release rate of radionuclides from the solidified blocks is controlled by the solubility limits and leaching rate of radionuclide. The present work investigates the solubility and leaching processes and their effect on the safety assessment of a radioactive waste in the repository. The paper studies both processes with different concentrations of elements. The experimental study focused on the elements; Strontium (Sr), Cobalt (Co) and Iron (Fe). To simulate the effect of radiation emitted from the radionuclides of these elements, the cement blocks that confine the elements are irradiated by Gamma (ɣ) Rays of doses; 40, 120, and 240 kGy. The results of non-irradiated and irradiated blocks are compared. The results indicate that ɣ radiation has significant effect on the pH of the leachate. The relation between leaching rate and solubility is illustrated.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Usages of Nanomaterials in the Treatment of Primary Coolant Water for Pressurized Water Reactor33456547810.21608/ajnsa.2019.16335.1259ENMahmoudAbdel-GoadDepartment of Chemical Engineering, Faculty of engineering, Mina UniversityNarmineMahmoudEgyptian Nuclear Radiological and Regulatory AuthorityBasmaSaadEgyptian Nuclear Radiological and Regulatory AuthorityJournal Article20190827The application of nano silica extracted from kaolinite, bentonite and rice straw is proposed as treatment material for the purification of primary coolant water of pressurized water reactor. Three elements are used to simulate some radionuclides that can be released in the primary coolant water; strontium, nickel and cobalt. Various batch experiments are performed; selection of efficient sorption nanomaterial, Optimum operational weight ratio (element/nano material, selectivity of the nano silica for elements used, determination of the equilibrium curve of sorption process, and desorption behavior of nanomaterial with pH and temperature variation. The samples are analyzed by using the inductively coupled plasma emission spectrometer. Silica of kaolinite, bentonite and rice straw show the same results to remove the three elements used. Silica form of rice straw has been selected as nano-treated materials for economic reasons and avoiding problem of pollution. The sorption process is reached equilibrium after 30 min approximately. The experiments demonstrate that the sorption reaction of element by the nano-silica is irreversible reaction with the change of temperature and pH. Objectively, these findings from experiments using the nano silica increase the safety margin of the treatment stage in the multi barrier concept.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Event by Event Studies of Au-Au Collisions at √(S_NN )=200 GeV Using Two Event Generators46576582210.21608/ajnsa.2019.9617.1182ENMohammed HasanMohammed SoleimanPhysics Department, Faculty of Science, Cairo University Giza,, 12613, Egypt.Journal Article20190220The study of hadrons production in relativistic heavy ion collisions at STAR provides the researchers with valuable techniques to investigate the properties of quark gluon plasma (QGP) and the subsequent hadronizations. In the present work, we are going to investigate the asymmetry in hadron and anti-hadron productions at the relativistic heavy ion collisions with parameters; Δϕ: the azimuthal angle of the transverse momentum vector (p_t ) ⃗ with respect to the reaction plane, p_t: the transverse momentum, η:seudo rapidity, and Y: the rabidity, and allowing for event by event (i.e. local) studies. HIJING and HYDJET++ models are used to explain the data of the experiments produced at the RHIC for Au-Au relativistic collision by STAR, PHENIX, and BRAHMS experiments. Hadrons and the anti-hadrons productions are based on Monte Carlo techniques in the models. The particles selected for this study are proton and lambda (P^±,〖 Λ〗^± ) for baryons, and pi and kaon (π^±,κ^±) for mesons in order to determine the most probable production-asymmetries regions in phase-space of hadrons and anti-hadrons for heavy ions 〖^197〗 Au_79 -〖^197〗 Au_79 collisions at √(S_NN )=200 GeV with about ≥800 events, which are generated from each model event generator. It is found that, HYDJET++ 2.0.2 event generator is more realistic in comparing the results of simulations with those of the experimental data published by the BRAHMS, PHENIX, and STAR Collaboration.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Quantification of Various Factors Influencing Repeatability and Reproducibility of TLD-600 Detector58666582310.21608/ajnsa.2019.13313.1219ENAbdelhamid OmranElsheikhPhysics department, faculty of science, Helwan university, helwan,egyptArafaAbd El-HafezIonizing Radiation Metrology Laboratory, National Institute for Standards (NIS) Giza., EgyptMona MoustafaAhmedPhysics Department, Faculty of Science, Helwan University, Helwan, Egypt.Yassin Abdul-AzimAbdul-RazekNuclear material Authority, Cairo, EgyptMohamed ElsayedEl-NagdyPhysics Department, Faculty of Science, Helwan University, HelwanJournal Article20190323Various factors affecting the random and systematic error in the repeatability and reproducibility of thermoluminescent 6LiF:Mg,Ti dosimeters were investigated. These characteristics were examined by irradiating them with different doses in the range 3.8 µG to 433.94 mGy from a Cs-137 gamma source. Values of the element correction factors (ECFs) were obtained by exposing the chips to a dose of 433.93 mGy five times. This investigation denotes that more correction will be obtained by calculating the error due to non-subtracting zero dose reading from the delivered dose, which decreases the coefficient of variation as a percentage of the mean from range of 2.4%-18.6% to only 0.7%-16.9%. Using the individual sensitivity factor and repeating five calibrations decrease the coefficient of variation as a percentage of the mean to only 0.54% and the values of the Variability Index for System (SVI), Reader (RVI) and Detector (DVI) are 1.46 %, 1.40% and 0.34% respectively. Also, it is clear from the results that the best repeatability and reproducibility are going to be obtained by using the element correction factor associated with each dosimeter rather than carefully selecting the individual dosimeters. Finally, from the results we can note that at low doses the value of relative coefficient of variation becomes very large while at high doses it becomes basically constant and of the order of a few percent.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Peripheral Photon Doses from Different Techniques Delivered in Prostate Radiotherapy: Experimental Measurements and TPS Calculations.67756582410.21608/ajnsa.2019.13839.1222ENHalaAzabIonizing Radiation Metrology Lab., National Institute of Standards, Giza, Egypt.RanyaMoussaRadiation Therapy Department, Faculty of Medicine, Cairo University,Cairo, Egypt.MahaKamaleldinRadiation Therapy Department, Faculty of Medicine, Cairo University, Cairo, Egypt.Journal Article20190619Advanced techniques and modalities in delivering radiotherapy improved the ability of delivering higher tumor doses while minimizing dose to the critical organs. The aim of this work is to determine experimentally out-of-field doses associated with these modern radiotherapy techniques for actual clinical case of prostate carcinoma and intercompare it with the treatment planning system (TPS) calculations. Three prostate treatment plans of the intensity-modulated radiation therapy (IMRT), RapidArc, and the Three-Dimensional Conformal Radiotherapy (3D-CRT) techniques were delivered to an anthropomorphic phantom using 6 MV photons beams produced from a UNIQUE linear accelerator. The out-of-field surface doses at various distances from the isocenter and peripheral doses to organs at risk (OARs) were measured using the thermoluminescent detectors (TLD-700) then compared to the calculated doses from the used commercial Eclipse TPS version 11. The two implemented algorithms in the Eclipse TPS (analytical anisotropic algorithm, AAA and the Acuros XB algorithm, AXB) underestimated the surface out-of-field doses by a maximum average deviation of 49% till the distance of 15 cm from the isocenter reported to the 3D-CRT technique. IMRT and RA techniques were more precise than 3D-CRT in tumor coverage and sparing of OARs but resulted in larger peripheral photon doses. RA technique has the advantage of less treatment time than IMRT technique and also produce less peripheral photon doses because it uses fewer monitor units. Our results show that although AXB algorithm is significantly faster in dose calculations than AAA algorithm especially in modern techniques, but less accurate in estimating the out-of-field doses.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Radioactivity and Geochemistry of Wadi El Reddah Stream Sediments, North Eastern Desert, Egypt76876582610.21608/ajnsa.2019.14126.1224ENOsama Abdel MoniemEbyanGeochemical Exploration Department, Nuclear Materials Authority (NMA), cairo, Egypt.0000-0002-5422-4080HosamKhamisNuclear material authority Cairo EgyptHaniAlinuclear material authority Cairo EgyptNeveenAbednuclear material authority Cairo EgyptJournal Article20190627Wadi El Reddah is considered as semi closed basin where the only open tributary is very narrow and has higher ground relative to the ground adjacent to the surrounding peaks. The 238U activity concentrations range between 101.24 and 347.96 with an average 214.63 Bq Kg-1, 234U activity concentrations range between 89.67 and 308.19 Bq Kg-1 with average 190.10 Bq Kg-1. 232Th activity concentrations vary between 96.42 and 463.71 Bq Kg-1 with 240.46 Bq Kg-1 as an average. 40K ranges between 1092.71 and 1227.25 Bq Kg-1 with an average 1153.82 Bq Kg-1. 235U activity concentration ranges between 4.66 and 17.38 Bq Kg-1 with average 10.19 Bq Kg-1. Most of stream sediment samples exhibit increase in SiO2, Fe2O3t, Na2O, P2O5 and K2O and L.O.I. However, trace elements in the studied samples show enrichment in Ni, Cu, Pb, Zn, Cd, Ta, Nb, Zr, Y, Rb, Cs, Ga, Hf, Sn, Th, Tl, U, W, Mo, Bi, As, Be, Li, Sb and Au whereas they are depleted in Co, Sr, V, Ag, Cr and Sc. Zr, Hf and Y are relatively immobile and essentially concentrated in the accessory minerals (zircon and its alteration product branirite, xenotime, thorite and uranothorite). Their REE patterns are well characterized by the M- and W-type tetrad effects. The M- type tetrad effect could be inherited from the surrounding granitic rocks whereas the positive Y anomalies intimately associating with the W-type tetrad effect of REE mainly occur in natural aquatic solutions including seawaters and in some hydrogenous deposits.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Surface modification of Cu/PS nanocomposite films: A comparative study of DC N2 plasma and Gamma radiation and their effects on the films' antibacterial activity88966586110.21608/ajnsa.2019.11047.1194ENNaglaa MohammedEl-SayedFaculty of Science, Zagazig University, EgyptNora AhmedEidFaculty of Science, Zagazig University, EgyptJournal Article20190323In this work we present a comparative study on the efficiency of surface modifications of Copper/Polystyrene (Cu/PS) nanocomposite films, induced by N2 DC plasma and gamma radiation to enhance their surfaces' antibacterial activity. Cu/PS nanocomposite films, with different concentrations of copper 0.4, 0.8 and 1 wt.%, were prepared by the solution casting method at room temperature. The samples were exposed to gamma with different radiation doses and N2 DC plasma for different treatment time. The structural and morphological properties of the samples were investigated before and after treatment by, water contact angle measurements, weight loss and scanning electron microscopy. The surface of the films were found to be more sensitive to N2 DC plasma than gamma radiation. The antibacterial properties of Cu/PS nanocomposite films against Staphylococcus aureus 15 have been evaluated by the optical density and colony forming unit's techniques. The results indicated that the N2 DC plasma treatment enhanced the antibacterial properties more than gamma radiation.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Mathematical Model for Studying the Effect of the Atmospheric Boundary Layer on the Surface Ozone Variations at a Coastal Site971096586210.21608/ajnsa.2019.12283.1210ENIbrahimBashterDepartment of physics, Faculty of Science, Zagazig UniversityMohamedLasheenNuclear Research Center Atomic Energy Authority ‎EmanMassoudFaculty of Science, Princess Norah Bint Abdulrahman UniversityOlfatSaadNuclear and Radiological Regulatory Authority &lrm;AnisaEl-GhazalyNuclear Research Center Atomic Energy Authority ‎Journal Article20190425Atmospheric Boundary Layer (ABL) height (h) is one of the basic criteria for describing its structure. ABL measurements, parameters and predictions have numerous practical and theoretical implementations as forecast of pollutant concentrations, surface temperature, expansion of disturbance measurements or in climate models and numerical weather prediction. The height of mixing layer is difficult to be measured; therefore, mathematical methods are introduced to calculate this layer and different FORTRAN programs have been developed to define the height of ABL on hourly basis per year. The analysis of the results showed that the variation of the height of the mixing layer for different seasons depends on the type of the dominant stability class and the value of wind speed, where the rise of the mixing layer in winter and autumn months may be referred to increased frequency of stability conditions in the unstable and slightly unstable atmosphere On the other hand, when the stable conditions are dominant, the height of the mixing layer remains smaller. <br /> The boundary layer ozone is a standard contaminant because of its harmful effects on living organisms and plants. It also has an active role in atmospheric chemistry and climate change; therefore, monthly and seasonal variation of the surface ozone O3 concentration and its effects on the atmospheric boundary layer measured for the first time at coastal site in Egypt at the period 2013.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Improved Surface Properties of Copper/PolyMethylMethacrylate nanocomposite films using DC O2 Plasma1101186586310.21608/ajnsa.2019.12400.1214ENNaglaa MohammedEl-SayedFaculty of Science, Zagazig University, EgyptOmar FaragFaragZagazig University, Faculty of Science, Physics Department, Zagazig, Egypt0000-0002-6423-7790Doaa Abd AlhameedNasrallahFaculty of Science, Zagazig University, EgyptJournal Article20190429Films of Polymethylmethacrylate with copper nanofiller were prepared and treated with low temperature oxygen DC glow discharge plasma. FTIR spectroscopy, AFM, water contact angle (WCA) measurements and UV-Vis spectroscopy were used to detect the produced chemical, morphological and optical changes as a function of plasma treatment time. The FTIR spectra, showed a decreasing value of the main characterizing signals of the composite films in addition to the creation of an oxygen containing functional group. The surface morphology of the treated samples was altered according to the increased values of the average surface roughness, obtained from the AFM images. The WCA also, decreased noticeably with increasing treatment time. The UV-Vis spectroscopic analysis showed a decreasing value of the optical absorption in the wave length range 190-270 nm which is an indication to the loss of carbonyl group. The value direct and inddirect optical band gap decreased with treatment time meanwhile, values of the band tail width were significantly increased.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Comparative Study and Dose Evaluation of Photon Beam for water phantom,2D-array and Treatment Planning System in Small Field sizes1191246586410.21608/ajnsa.2019.13053.1217ENSherihanHassanNational Cancer Institute (NCI), Cairo University, Cairo, Egypt0000-0003-3304-0781ArafaAlyTH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, EgyptNashaatDeiabCairo UniversityJournal Article20190522This study assessed the clinical usefulness of the 2D-Array Seven29 ,which may compensate for the of the water phantom, by comparing the radiological doses between the two depending on five field sizes. The experimental equipment used was a linear accelerator for medical use, treatment planning system (TPS) , water phantom, 2D-Array, solid phantoms,( Semiflex , Pinpoint) types ion chamber and electrometer. The field size was 10 x 10 cm2 and the radiation energies of the photon beam were 6 MV and 15 MV, The field size involved (1×1, 2×2, 3×3, 4×4, 5×5,) for each energy. The relative deviation ratio of the TPS to both chamber in water phantom and TPS to 2darray in the solid phantom was calculated. The measured doses in standard phantom were less than the TPS values for small field dimensions for fields less than 3×3 cm2, The measured data by 2D-Array data for fields 2×2 and 3×3cm2 this difference within ±2% is due to good accuracy of measurement planning system for field size 1×1cm2. The measured in standard phantom were less than the TPS values for small field dimensions and the measured data by 2D-Array for 6 MV shows mild differences between the TPS and the experimental data. Small difference existed between the TPS and the experimental data using 2D-Array for 15 MV the results were the same for TPS and measured data, at only field dimension of 1×1cm2. Measured data was increased as field area enlarged from 2×2 to 5×5cm2 by constant value of 4%.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Analyze the effect of void fraction on the main operating parameters of the VVER-12001251366600310.21608/ajnsa.2019.5643.1128ENAhmed AbdelghafarGalahomBasic Science, Higher Technological Institute, 10th of Ramadan City, EgyptJournal Article20181014The VVER-1200/AES-2006 is one of the most promising nuclear reactors for power generation. This work provides an in-depth analysis of the void fraction effect on the operation of VVER-1200 using MCNPX code. The void fraction in the VVER-1200 may be result from the loss of coolant accident (LOCA) or boiling the moderator/coolant materials. The fission multiplicities (υ), the estimated of the recoverable energy per fission (Q) and the effective delayed neutrons fraction (βeff) have been investigated at different fuel enrichment and a different void fraction. It is beneficial to calculate the βeff at the different void fraction and different enrichment, due to its impact on the reactor power change rate. The excess reactivity in the reaction can be controlled using the gadolinium dioxide or boron carbide. Increasing the void fraction decrease the burnup rate of gadolinium dioxide and boron carbide in the VVER-1200 assembly. The Doppler coefficient has a large effect on the reactivity of the reaction. Therefore, it is important to calculate the Doppler coefficient at different fuel temperature. The existence of the void fraction increases the concentration of the most hazardous radioactive nuclear waste products.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101The Models Used in Predicting Steam Condensation Occurs during Nuclear Reactor Loss of Coolant Accident1371486600410.21608/ajnsa.2019.6413.1146ENAdel LotfyIsmail MohammedNuclear Research Centre, Reactors Department,0000-0001-9693-856XJournal Article20181202The objective of this paper is to make review and comparison between the methodologies used for modeling condensation with non-condensable, in two-phase flows channel. The important state-of-the art numerical algorithms for the solution of multi-phase conservation equations are reviewed. The methodology for modeling condensation in these algorithms is based on the stagnant film theory. The methodology used in RELAP5/MOD3 that was the most accurate model is rigorously treats the coupling between the heat and mass transfer process, and gas-liquid interphase without iteration. <br /> <br /> <br /> The objective of this paper is to make review and comparison between the methodologies used for modeling condensation with non-condensable, in two-phase flows channel. The important state-of-the art numerical algorithms for the solution of multi-phase conservation equations are reviewed. The methodology for modeling condensation in these algorithms is based on the stagnant film theory. The methodology used in RELAP5/MOD3 that was the most accurate model is rigorously treats the coupling between the heat and mass transfer process, and gas-liquid interphase without iteration.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Comparison of Thermoluminescence Dosimeter’s Response to Neutron and Gamma in a Mixed Radiation Field1491556600610.21608/ajnsa.2019.11356.1198ENNabilHassanDepartment of Physics, Faculty of Science, Zagazig University, Zagazig, P.O. Box 44519, EgyptNassifAnsourdepartment of physics- faculty of science- zagazig university- EgyptTalaat Salah El-DinGazyRadiation Protection Depart., NRC, EAEA Inshas, Abou-Zabal, Cairo, Egypt.SaherGamalDepartment of Physics, Faculty of Science, Zagazig University, Zagazig, P.O. Box 44519, EgyptJournal Article20190331Measuring radiation dose in a mixed radiation field cannot be performed by using only one dosimeter, but a pair of dosimeters TLD600 and TLD700 can be successfully used to estimate that radiation dose. Therefore, in the present study, the response of TLD600 and TLD700 to neutron/gamma mixed radiation field was deeply discussed. Moreover, the sensitivity and stability of TLD600 and TLD700 were studied. A strong correlation between TL output signal intensity of TLD700 to gamma dose was appeared, with a linear coefficient of R2 = 0.99. Likewise, a strong correlation between TL output signal intensity of TLD600 to gamma dose and neutron irradiation was also appeared, with a linear coefficient of R2 = 0.99. Thus, TLD700 can be applied to measure gamma dose with good sensitivity, while TLD600 can be applied to measure both gamma and neutron dose. Hence, a combination of TLD700 and TLD600 can be successfully employed to assess the radiation doses characterizing a mixed radiation field of neutron and gamma rays.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101The Saturation properties of Nuclear Matter Using Different Three-Body Force at zero and finite temperature1561626600710.21608/ajnsa.2019.12162.1208ENMohamed AhmedEl-ZohryPhysics, Faculty of Scienceو Sohag University
Sohag, EgyptJournal Article20190421We have used the three-body force (3BF) to modify the two body forces to achieve the empirical saturation points as well as study the ground state properties for symmetric nuclear matter using the Brueckner-Hartree-Fock approximation (BHF) with the Argonne AV18 potential at zero and finite temperature. Besides the energy per nucleon (E/A) as a function of nuclear density ρ is calculated. Further, the correction of the two-body dependent potential (correction 1) is added to shift and improve the saturation properties of the nuclear matter from ρ_o=0.265 〖fm〗^(-3) to ρ_o=0.149 〖fm〗^(-3) at E/A = -16.142 MeV towards to the empirical saturation point ρ_o=0.16 〖fm〗^(-3). In addition, the pressure p for symmetric nuclear matter for zero-temperature T=0 as a function of density ρ/ρ_o using the Argonne AV18 potential is calculated revealing good agreement between our calculations and the experimental data. On other hand, more calculations for the pressure are added at different energies T= 4, 8, 12, 18 and 20 MeV. Also, the level-density parameter as a function of density ρ is calculated for the BHF approach. Moreover, the internal energy F for the symmetric nuclear matter as a function of density ρ using the Argonne AV18 potential for continuous choice at T= 4, 8, 12, 18 and 20 MeV for the BHF with and without 3BF is calculated.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Evaluation of ENDF/B-VI.8 and ENDF/B-VII.0 Nuclear Data Libraries using OSMOSE Samples of MINERVE Reactor1631716616310.21608/ajnsa.2019.14381.1228ENHeshamShahbunderDepartment of Physics, Faculty of Science, Ain Shams University0000-0002-1347-6820Journal Article20190706The evaluation of nuclear data libraries is an important tool to develop nuclear technology. To achieve this goal, OSMOSE program utilized samples that are composed of separated actinides which contain isotopes of americium, plutonium, uranium, and thorium. By inserting those samples in the core configuration of MINERVE reactor, they can be used for improvement of nuclear cross-section databases by cross checking their calculated reactivity worth per each sample using several nuclear data library versions and experimental measurements. The present study investigated the effect of the used nuclear data library on the calculated reactivity of MINERVE reactor with several OSMOSE samples employed in R1-UO2, R1-UO2, and R1-MOX core configurations. The study performed a comparison between the calculated effective multiplication factor using MCNPX code with ENDF/BVI.8 and ENDF/BVII.0 nuclear data libraries. Moreover, the relative difference between the calculated reactivity worth by ENDF/BVI.8 and ENDF/BVII.0 was examined and discussed using available experimental results of the relevant core.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Reduction of some extra-articular complications associated with arthritis development in rats by low dose γ-irradiation1721816649610.21608/ajnsa.2019.12214.1209ENHabiba Abd El-wahabAbd El-fatahBiochemistry,faculty of science, Ain shams university,Cairo, EgyptMagda KamalEzzBiochemistry Department, faculty of sciences, Ain shams universityHanan AhmedEl-kabanyHealth Radiation Research Department, National Center for Radiation Research & Technology, Atomic Energy Authority, Cairo, EgyptSawsan MohammedElSonbatyRadiation Microbiology Department , National Center of Radiation Research and Technology, Atomic Energy AuthorityJournal Article20190423Rheumatoid arthritis (RA) is considered a systemic inflammatory disease that affects not only the joints but also other organs in the body causing many extra-articular complications. Low-dose radiation (LDR) modulates a variety of immune responses that have exhibited the properties of immune hormesis. LDR has been used clinically for the treatment of autoimmune diseases. Several molecular mechanisms and cellular components contribute to the clinical efficacy of low dose radiotherapy (LD-RT). The present study aimed to evaluate the possible capability of low dose γ-irradiation to reduce some of these extra-articular complications in adjuvant-induced arthritis model in rats. Our results revealed a significant increase in liver parameters in serum including ALT, AST activities as well as creatinine level in adjuvant induced arthritic rats that indicate liver and kidney impairment respectively. Results also revealed sharp increase in total leukocytic count (TLC). All of these biochemical and hematological disturbances were found to be significantly improved after exposure to low dose γ-irradiation. <br /> Keywords: Rheumatoid arthritis, extra-articular complications, adjuvant induced arthritis, low dose γ-irradiationEgyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Detection of Radon, Radon Daughters and Thoron Daughters in Abu Tartur open pit Phosphate Mine, Egypt1821906649810.21608/ajnsa.2019.14897.1237ENMohamed HassanDallalRadiation safety department, Egyptian Nuclear and Radiological Regulatory Authority (ENNRA), Cairo, EgyptIbrahim EidHassanPhysics Department, Faculty of Science, Helwan University, Cairo, EgyptNadia LotfyHelalRaiation safety department, Egyptian Nuclear and Radiological Regulatory Authority (ENRRA), Cairo, EgyptRizk Abd El-MoneimRizkPhysics Department, Faculty of Science, Helwan University, Cairo, EgyptMohamed IbrahimHussainRadiation safety department, Egyptian Nuclear and Radiological Regulatory Authority (ENNRA), Cairo, EgyptJournal Article20190816In this study, Abu Tartur open pit Phosphate mine and underground tunnels have been studied from radiation safety point of view. Radon, Radon daughters and Thoron daughters were measured by collecting (31) samples from (5) main sites that represent the process of Phosphate mining. Radon, Radon daughters and Thoron daughters in case of open pit mining results ranged from 1.37 to 131.52 Bq m-3, 0.000099 to 0.0024 WL, and 0 to 0.92 Bq.m-3 respectively. For postpone tunnels, Radon, Radon daughters, Thoron daughters results ranged from 411.55 to 2539.27 Bq m-3, 0.056 to 0.37 WL, and 1.26 to 3.89 Bq.m-3 respectively. Also gamma radiation levels, surface contamination and effective annual dose were measured. Gamma radiation levels were ranged from 0.07 to 0.6 mSv/h for open pit mine and from 0.24 to 0.5 mSv/h for tunnels. Surface contamination measurements gave normal readings for open pit mining and 7.1 in underground mine. And effective annual dose ranged from 0.033 to 0.153 mSv/y for open pit and 4.948 mSv/y for tunnels. The results in case of open pit mine are lower than permissible limits determined by UNSCEAR, 2010 while exceeds the permissible limits in case of underground tunnels. So the open pit mining is much useful from point of occupational radiation protection viewEgyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Investigation of Microstructure and Mechanical Properties of Different Nano - Particles Doped Sn-Zn Lead-Free Solder Alloys1911996668510.21608/ajnsa.2019.13962.1223ENReda AfifyIsmailPhysics department, Faculty of Science , Ain Shams UniveristyJournal Article20190624This study investigate the effect of two different nano-particle additions; namely copper oxide (CuO) and/or titanium oxide (TiO2) to modify the properties of Sn-9wt. % Zn lead free solder alloy. The composite approach has been developed to enhance the microstructure and mechanical properties of lead free solder. The microstructure before and after alloy modification were investigated. Results indicated that 1wt.% of either CuO and /or TiO2 lead to microstructure refinement due to the the nanosized reinforced particles which dispersed uniformly in the solder matrix. A significant improvement is achieved by 1 wt.% TiO2 addition to Sn-9wt. % Zn. In the current work we have extended our studies to show the effect of different aging temperatures (75, 100, 125, 150 °C) on the solder alloy doped with 1wt.% TiO2. Anomalous effect was shown at the aging temperature of 100°C due to the dissolution of Zn-metal in the β-Sn rich phase. The stress exponent values for the solder alloy doped with TiO2 were found to be varied with aging temperatures between (4.7-14.9) respectively.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Estimation of Surface Skin Dose Using TPS and TLD of Breast Radiotherapy Using Co-60 Teletherapy Unit2002076675610.21608/ajnsa.2019.14766.1234ENMohammedElywaPhysics Department, Faculty of science,Zagazig University, Zagazig, EgyptMagdaHanfydepartment of physics, faculty of science, zagazig university, egyptMohamadAbd ElgawadNuclear medicine Department, Faculty of medicine, Zagazig University, EgyptBasmaEl-okbaM Sc. student, Physics Department, Faculty of Science, Zagazig University, EgyptJournal Article20190712Estimation of surface skin dose is very important for patients who undergo breast radiotherapy to show that the skin dose is under the safe level and to avoid tumor recurrence. The aim of this study is utilizing the thermolumiscent dosimeters (TLDs) as quality control in conventional radiotherapy procedures. Twenty patients undergo breast remove were stimulated by treatment planning system (TPS) and six lithium florid TLD-LiF chips have applied at the irradiated breast area. All measurements were performed using a Co-60 teletherapy (open field). All TLD chips were measured using the Harshaw 6600 reader system. Results have been shown that the correlation coefficient and the Bland–Altman agreement plot of 20 patients at six points illustrated that no significant difference (p>0.05) between TPS calculations and TLD measurements except at beams centers, there is high significance difference (p<0.001), where the high dose was applied. Thus, the conclusion is that not all locations in the area of treatment absorbed the same dose either using TLD measurements or using TPS valuesEgyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Gamma Irradiation Induced Preparation of Gum Arabic/ Poly (Vinyl Alcohol) Copolymer Hydrogels for Removal of Heavy Metal Ions from Wastewater2082216675710.21608/ajnsa.2019.15587.1246ENShaimaaNasefPolymer Chemistry Department, National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City, Cairo, Egypt.0000-0002-5323-0374EmanElNesrPolymer Chemistry Department, National Center for Radiation Research and Technology, Atomic Energy Authority, P.O. Box 29, Nasr City, Cairo, Egypt.FatmaHafezChemistry Department. Faculty of Science(Girls). Al-azher University, Cairo, EgyptNaguazBadawyChemistry Department. Faculty of Science(Girls). Al-azher University, Cairo, EgyptSabahSlimChemistry Department. Faculty of Science(Girls). Al-azher University, Cairo, EgyptJournal Article20190802In this study, the copolymer hydrogel was prepared by copolymerization of gum arabic (GA), Poly (vinyl alcohol) (PVA) using gamma irradiation. The factors affecting the preparation condition of (GA/PVA) copolymer hydrogels such as copolymer composition, copolymer concentration and irradiation dose were investigated. The swelling property of the prepared hydrogels was studied and the results showed that the swelling percent increases with increasing concentration of GA in feed solution and reached an equilibrium time at 6 h. The obtained hydrogels were characterized using thermal gravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). The morphology of the prepared hydrogels was examined by Scanning electron microscopy (SEM). The mechanical properties of copolymer hydrogel were measured by tensile strength (TS), elongation at break (Eb) and compressive test (CS). The prepared hydrogels can be used for the removal of Cu2+, Co2+, Pb2+and Cd2+ ions from industrial wastewater. The parameters influencing the metal uptake, for example, pH, time, GA content and temperature were investigated. The adsorption of metal ions by hydrogel increases as follow Pb2+ > Cu2+ > Co2+ > Cd2+. The prepared copolymer hydrogel possessed good affinity toward the adsorption of metal ions, which make them acceptable for the treatment of industrial Wastewater from such metal ions.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Plasma Current Sheath Dynamics and Energy Dissipation in a Low-Energy Plasma Focus Device2222336675810.21608/ajnsa.2019.16003.1256ENAhmedLashinPlasma and Nuclear Fusion Department, Nuclear Research Center, Atomic Energy Authority, Egypt.Tarek M.AllamPlasma and Nuclear Fusion Dept., Nuclear Research Center, Atomic Energy Authority, Egypt.Kamal M.AhmedPlasma &amp; Nuclear Fusion Dept.
Nuclear Research Center
Atomic Energy Authority
Egypt0000-0003-1086-5131Hanaa A.ElsayedPlasma and Nuclear Fusion Department, Nuclear Research Center, Atomic Energy Authority, Egypt.Sayed A.WardElectrical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Egypt.MohamedAnwarElectrical Engineering Department, Faculty of Engineering at Shoubra, Benha University, Egypt.Hanaa M.SolimanPlasma and Nuclear Fusion Dept., Nuclear Research Center, Atomic Energy Authority, Egypt.Journal Article20190819This paper reports the measurements of plasma current sheath (PCS) dynamics, the energy dissipation processes, and the plasma focus (PF) electrical characteristics, particularly during the axial phase discharge in a Mather-type PF device (EAEA-PF1) energized with a 30 µF capacitor bank charged with 8, 10 and 12 kV. All these works are carried out under discharge conditions where the optimal PF action is achieved. At each charging voltage (Vch), 8 kV, 10 kV and 12 kV, the optimal PF action is studied for different Argon gas pressures (P) ranging from 0.4 to 1.2 Torr. The results show that the best PF is formed at Vch = 8 kV and P = 0.6 Torr, Vch = 10 kV and P = 0.8 Torr, and Vch = 12 kV and P = 0.8 Torr. The implosion velocity (Vz) results of PCS show that the maximum value of Vz (4.48 cm/µs) occurs at the end of the axial phase (i.e., at the coaxial electrode muzzle), which is detected at Vch = 12 kV and P = 0.8 Torr. Moreover, a less inefficient snowplow action is observed under these discharge conditions. The energy dissipation process data indicate that at Vch = 12 kV and P = 0.8 Torr, the ratio between the total energy dissipation and the input energy has a maximum value of ≅ 90%, and the minimum residual energy left on the condenser bank (175.39 J) is also achieved under these discharge conditions.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Anticancer Activity of Fermented Solenostemm Aargel Extract and/or Low Dose Gamma Radiation Against Hepatocellular Carcinoma2342426650010.21608/ajnsa.2019.66500ENAsmaaHassanDepartment of Radiation Biology, National Center of Radiation Research and Technology, Atomic Energy Authority, EgyptS. M.El-SonbatyDepartment of Radiation Microbiology, National Center of Radiation Research and Technology,
Atomic Energy Authority, EgyptJournal Article20190101<strong><span>For many decades the terrestrial plants are represent an infinitive source of bioactive substances as well as pharmaceutical components which play a main role in the discovering ,developing and manufacturing of anticancer and antibiotic drugs.Solenostemmaargel is a desert plant widely used in Arabic countries as antispasmodic, anti-inflammatory and anti-rheumatic agent. It also has anti-tumor activity. Aim: the present study was oriented to investigatethe hepato-protective effect of fermentedSolenostemmaargelleave extract (100amg/kg b.wt) and/or low dose γ-radiation (0.5Gy) againsthepatocellular carcinoma (HCC)developedin rats by injection of diethylnitrosamine. Results: the data obtained revealed that thepro-apoptotic agents (caspase 3 and cytochrome c) undergoes significant elevation in HCC rats received plant extract and/or γ-radiation compared to HCC rats.While,the vascular endothelial growth factor (VEGF), hypoxia inducible factor-α (HIF-α)and monocytichemotactic protein-1(MCP-1) were significantly decreased. Also, the activity of cyclooxygenase-2 (COX-2) was significantly decreased. Moreover, the histopathological analysis revealed that a mild improvement .In conclusion, the improvement emerged in HCC rats could be attributed to the potency of extract and/or γ- radiation by induce apoptosis and reduce angiogenesis.</span></strong>Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153120200101Characteristics of Biological and non-biological Aerosol Particles in Indoor Environment and their Inhalable Fractions in the Human Lung2432516714710.21608/ajnsa.2020.67147ENJournal Article20190731<strong>Air quality of public buildings is an important issue to assess human health. School and university buildings represent an important category of indoor environments. This study aims at evaluating the concentration and size distribution of fungal and non-biological aerosol particles in classrooms of Minia University, Egypt. In addition, the inhalable fractions were determined and indoor exposure dose (IED) of fungi and aerosols were estimated for the students. A six-stage Andersen impactor was used for collecting the fungal particles and Berner cascade impactor was used for sampling the non-biological aerosol particles. Indoor average concentration of fungi was 307±102 CFU/m<sup>3</sup>. The most frequently isolated genera were <em>Aspergillus niger</em> with concentration 175±85 CFU/m<sup>3</sup> representing about 57% of the of the total collected fungi. <em>Aspergillus flavus </em>represents about 31% of the total fungi with concentration 96±32 CFU/m<sup>3</sup>. A low concentration 36 ±12 CFU/m<sup>3 </sup>of <em>Penecillium </em>was investigated representing only 12% of the total collected fungi. The mean concentration of non-biological aerosols was 442±99 µg/m<sup>3</sup>. The concentration of airborne fungal aerosol particles were lower than the World Health Organization guideline while the corresponding concentration of non-biological aerosols exceeded WHO limit. Most of the collected fungal particles were found in the inhalable size range (< 5µm) where inhalable fraction of fungi represents 84% of the total collected particles while inhalable fraction of non- biological aerosols represents 92% of the total collected particles. Size distributions of biological and non-biological aerosols were bimodal in nature. IED of fungi was 25.6 CFU/kg while the IED of non-biological aerosols was 37 CFU/kg.</strong>