@article { author = {Gazy, Talaat}, title = {Measurements of Entrance Skin Dose in Egyptian Pediatric During Diagnostic X-Rays using Thermo Luminescence Dosimeter (TLD -100)}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {1-5}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2643.1056}, abstract = {Radiation protection in pediatric radiology deserves special attention where children are more sensitive to radiation than adults This study is concerned with the measurements of pediatric entrance surface dose (ESD) using thermo luminance dosimeter (TLD, LIF100) for patients ranging from age intervals: 0.1 -5 years, 5-10 years and 10-16 years . A central public pediatric hospital and 120 Egyptian patients were included in this investigation . By careful selection of patients three types of simple radiography were select ;(50chest,35abdomen and 35 skull). Pediatric chest examinations are the most frequent radiological examinations comparisons were made between these doses and diagnostic reference levels (DRLs). The results showed that mean patient skin doses measured with TLD for age ranged from 10-16 years old were 0.20 mGy 14%, 1.10 mGy 23% and 1.00 mGy 40% for chest, abdomen and skull examination respectively. The mean ESD values are found to be within the range ESD reference values except for chest examination.}, keywords = {Entrance Skin Dose,Pediatric,Diagnostic X-Rays,(TLD -100)}, url = {https://ajnsa.journals.ekb.eg/article_19709.html}, eprint = {https://ajnsa.journals.ekb.eg/article_19709_fb8179ab4dba6230295a58d5db27077b.pdf} } @article { author = {El seifi, Safaa and Abou-safi, Hekmat and Omar, Amal}, title = {Protective Effect of Emblica officinalis on Cardiac Dysfunction in Gamma-Irradiated Male Albino Rats}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {6-13}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2858.1057}, abstract = {Abstract: Emblica officinalis (EO) is a plant with diverse ethnical medicinal uses. The plant has been explored for diverse pharmacological actions, here it was planned to screen the radio-protective activities of its fruit powder. Experimental Animals and Design: Four groups of male albino rats were used: 1- Control: untreated group. 2- Irradiated: animals exposed to a single dose of whole-body gamma-irradiation (6Gy). 3- Eo group: given daily EO fruit powder dissolved in distalled water at a dose of 750mg/kg b.wt., for 30 days, intragastrically. 4- EO+ Irrad. group: given EO (as group 3), the last dose being 2 hours before irradiation. Blood and heart tissue samples were collected after 2hrs and 2 weeks post irradiation. Parameters Measured: Reduced glutathione (GSH) content and malondialdehyde (MDA) levels were measured in cardiac mitochondrial fraction. Xanthine oxidase (XO) and xanthine dehydrogenase (XDH) activities and the level of advanced oxidation protein products (AOPP) were measured in the cytosolic fraction of heart tissue. Atrial natriuretic peptide (ANP) and creatine phosphokinase (CPK) activity were measured in plasma. Cardiac cytosolic glucose-6-phosphate dehydrogenase (G6PDH) and Lactate dehydrogenase (LDH) activities were determined. Results: EO administration pre-irradiation, improved the disturbances induced in the heart by irradiation.}, keywords = {Ionizing radiation,Emblica officinalis,Cardiac functions}, url = {https://ajnsa.journals.ekb.eg/article_19710.html}, eprint = {https://ajnsa.journals.ekb.eg/article_19710_8f54754b0a799175e9834132d0a067a0.pdf} } @article { author = {saudy, heba and khamesy, samir and Garawi, M}, title = {Precise Assessment of gamma absorbed dose rates using different techniques.}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {14-21}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2415.1031}, abstract = {In the present work, the gamma spectroscopy technique has been applied to determine the outdoor and indoor absorbed dose due to background gamma radiations outside and inside King Saud University campus in Malaz (Girls' Branch). Also, thermoluminescence technique along with a theoretical model based on Monte Carlo simulation and point Kernel dose equation have been applied to determine the gamma rays indoor absorbed dose rates in the same place. The absorbed dose of each gamma line was calculated and estimation of the total absorbed dose for the detected gamma lines were obtained and found to 44.73 and 55.03 nG/h for outdoor and indoor respectively. Furthermore, TLD dosimeters were employed for two consecutive 60 days measuring periods. The obtained TLD results provide an estimation of outdoor and indoor average dose rates of values 45 and 63.21 nGy/h respectively. Additionally, the mean value of gamma rays indoor absorbed dose rates obtained by means of the applied theoretical model was 58.49±2.1 nGy/h.}, keywords = {absorbed dose,HPGe,TLD dosimeters}, url = {https://ajnsa.journals.ekb.eg/article_19907.html}, eprint = {https://ajnsa.journals.ekb.eg/article_19907_5101bd2ffe511d2c955c34129934c8c2.pdf} } @article { author = {Ahmed, Rania and A. Ibrahiem, A. and A. El-sayd, E.}, title = {Effect of Cobalt Chloride on the Optical Properties of PVA/PEG Blend}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {22-32}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2768.1049}, abstract = {Herein, solution casting technique has been used to prepare films of different composites of cobalt chloride (CoCl2) embedded in a blend of (poly vinyl alcohol (PVA) /poly ethylene glycol (PEG) 72/28 wt.%). Fourier Transform Infra Red (FT-IR) has been used to determine the effect of CoCl2 on the characteristic functional groups of both PVA and PEG. A shift in the absorption edge of the pure blend has been obtained by adding CoCl2 which indicates a decrease in the energy gap (Eg) values based on the CoCl2 content. By increasing the content of CoCl2, the refractive index, the Urbach energy, the dispersion parameters, the moments of the optical spectrum and the static dielectric constants show a reduction in their values compared to these of the pure blend. The oscillator energy gap Eo equals about 2.23 Eg, for the different composites. The calculated values of the penetration depth, for all the composites, exhibit an increase by increasing the wavelength whereas they decrease in the region of the absorption band of the CoCl2 from 420 nm to 750 nm depending on the CoCl2. The optical conductivity of the composites has been increased in the region of the absorption band of the CoCl2.}, keywords = {Cobalt chloride,optical conductivity,energy band gap,Urbach energy, optical dispersion parameters}, url = {https://ajnsa.journals.ekb.eg/article_19908.html}, eprint = {https://ajnsa.journals.ekb.eg/article_19908_a6915e8ccaf6dbfe3c9ce3c4ac46601f.pdf} } @article { author = {Ali Mohamed, Mostafa and Salama, Mohamed and Yousef, Kholood}, title = {Detection of Natural Radionuclides Concentration in Corchorus olitorius and Soil asAffected by Different Fertilizers}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {33-43}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2950.1063}, abstract = {The main objective of this work to measure the activity concentration of naturally radionuclides 226Ra, 238U, 232Th and 40K in sandy loam soil and leaves of Jew's-mallow plant (Corchorus olitorius). A pot experiment was carried out and Jew's-mallow was cultivated in sandy loam soil with six types of commercial and recommended fertilizers (NPK). The activity concentrations of 226Ra, 238U, 232Th and 40K in Bq kg-1 were measured by the high purity germanium detector to assess the effective dose of Jew's-mallow that largely consumed by Egyptian population. Gamma activities at the end of grown season in sandy loam soil contain slightly higher concentration of natural radionuclide than that soil at the beginning season and lower than worldwide values. The transfer factor for 226Ra, 238U, 232Th and 40K from soil to Jew's-mallow plants is less than unity in all treatments. The estimated annual effective dose due to the ingestion of Jew's-mallow plant varied from 7.89 - 21.5µSv y-1, which indicated that the use of fertilizer is not effect on the level of radionuclide in Jew's-mallow and it's safe for human consumption.}, keywords = {Gamma activities,fertilizer,Sandy loam soil,Jew&#039;s-mallow,Transfer factor}, url = {https://ajnsa.journals.ekb.eg/article_20272.html}, eprint = {https://ajnsa.journals.ekb.eg/article_20272_86a0285c1bbbc0d96cf2b2641eca8c5e.pdf} } @article { author = {Shoeib, Marwa}, title = {The Induced Changes in the Bulk Etch Rate and the Thermal Stability of PADC by the Effect of Long Storing Time at Room Temperature and Heat Treatment}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {44-55}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2917.1058}, abstract = {The samples of poly allyl diglycol carbonate PADC (CR-39) (stored and fresh samples) polymer track detectors have been heated for different annealing temperatures and different annealing times. The thermal stability has been studied for different annealed samples; also it was examined as a function of storage time. The degree of crystallinity percentage has been studied for different annealed samples and stored samples. The samples were etched in 6 M KOH solution at 70°C for 3 h as etchant duration. The variation of bulk etch rate of isochronal annealed samples has been studied. The results indicate an improvement in the thermal stability of Poly allyl diglycol carbonate PADC; where the bulk etch rate increases with the increase in the annealing temperature and annealing time. The storage time has no noticeable effect on the bulk etch rate of un- annealed samples, though the thermal stability of PADC improved with increasing the storage time.}, keywords = {CR-39,Annealing Temperature,storage time,Thermal stability,Activation energy}, url = {https://ajnsa.journals.ekb.eg/article_20273.html}, eprint = {https://ajnsa.journals.ekb.eg/article_20273_1677ea8cf0658e8eba44799f8aa104b5.pdf} } @article { author = {Hassan, Amin and Gamal, Mohamed and Zakhary, Safwat and Osman, Lama and Hanafy, Magda}, title = {Development of a Radio Frequency Coupled Broad Beam Ion Source for Material Processing}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {56-69}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2616.1038}, abstract = {The development of a radio frequency (RF) broad beam ion sources for generating a high brightness ion beams for material processing is presented. The source was able to deliver ion beams from 100 eV up to 2000 eV and with beam currents 100 µA up to 25 mA. The beams divergence do not exceed 7 degrees when using nominally flat grids. The current of ions extracted from a plasma source depends on the plasma parameters particularly the electron number density and electron temperature of the plasma. The Optical Emission Spectroscopy (OES) is employed to determine the plasma electron density and temperature. The effects of argon filling pressures and RF power on electron temperature and density plasma parameters are investigated. The electron density of Ar plasma is between 4x1011 cm-3 and 7x1012 cm-3 whereas electron temperatures 0.6 - 5 eV at pressures from 5x10-4 - 8.5 x10-3 mbar over the RF powers deposited within the plasma from 25 W to 200 W. The ion source is installed on a homemade accelerating tube. The beam optics is extensively studied with space charge compensation by TRANSPORT code. A solenoid magnet located between the ion source and the accelerating tube is used to focus and get the beam divergence under control. The performance of the accelerating facility is reported and applications for material modification is examined.}, keywords = {Radio Frequency ion source,Optical Emission Spectroscopy,Ion Beam Processing}, url = {https://ajnsa.journals.ekb.eg/article_20315.html}, eprint = {https://ajnsa.journals.ekb.eg/article_20315_12aeff658492211ab419453e5b2fce69.pdf} } @article { author = {Sife-eldeen, Kh.}, title = {On the Possibility of Urea Peroxide Formation in ɤ- Irradiated Urea Aqueous Solution : A Spectroscopic Study}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {70-88}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2236.1022}, abstract = {In order to investigate the possibility of urea peroxide formation in ɤ- irradiated urea aqueous solutions, we conducted energy-dispersive x-ray (EDS), mass, 1H NMR, and Raman spectral studies on the solid residues (SR) that remains after water evaporation of these solutions. Spectroscopic data of SR for both irradiated and unirradiated samples were analyzed and compared. EDS data show an increase of oxygen content in SR of urea aqueous solutions upon radiolysis. Comparison of mass spectrum of RS of irradiated sample and that of urea shows a significant increase in m/z 16 peak intensity of O+ as well as m/z 61of M+1in the former. The NMR spectrum of SR of an irradiated sample shows a signal down field shift of urea protons, as well as the appearance of new signals, which were assigned to H2O2. The Raman spectral study of both RS and solutions evinces differences in all band positions and intensities for irradiated samples. As a consequence of this study, it seems that the possibility of urea peroxide formation in ɤ- irradiated aqueous urea solution cannot be rolled out.}, keywords = {Keywords: Urea peroxide,urea,ɤ-Radiation,Raman,NMR,mass spectrometry,Energy-dispersive x-ray spectrometry}, url = {https://ajnsa.journals.ekb.eg/article_20915.html}, eprint = {https://ajnsa.journals.ekb.eg/article_20915_269e9d1830bcd4eb7b884ac1fa905172.pdf} } @article { author = {el shennawy, Ashraf}, title = {Improvement of Low-grade rutile using chemical and physical processes}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {89-107}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2406.1029}, abstract = {This paper describe improvement of Low-grade rutile Rutile is very important mineral for several industrial applications . So, in this work we will discuss the physical and chemical methods which are used to beneficiation of low grade rutile sample (10 Kg ) was collected from Abu Khashaba beach area at the Mediterranean cost ( Fig. 1 ) . The leach process whereby iron coatings around rutile particles is removed by the addition of sulphuric acid at 20 wt% to mineral at 160°C .Then the sample is sent for the physical processes which include up-current classifiers, gravimetric separation, hydraulic separation and magnetic separation . Stereo microscope and XRF analyses were used to study heavy and light mineral fraction .Rutile identification is established and the results at optimum conditions gave a high grade of rutile product which analyzed 95.8 % Ti with 0.8 % Fe, 1.8 % Zr and 0.80 % Nb.}, keywords = {Up-current classifiers,Gravimetric separation,Hydraulic separation}, url = {https://ajnsa.journals.ekb.eg/article_20916.html}, eprint = {https://ajnsa.journals.ekb.eg/article_20916_7f9d218206e2e0a9153bdb14f1ce4d16.pdf} } @article { author = {Salama, Mohamed and Yousef, Kholood}, title = {Effect of Organic Manure Application on Neutron Moisture Meter Calibration Curve of Sand Soil}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {108-111}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2844.1055}, abstract = {Neutron moisture meter (NMM) calibration accuracy and precision must be done to obtain reliable results. The aim of this study was to investigate the effect of applied organic manure on neutron moisture meter calibration curve of sandy soil. The experiment was carried out at the farm of soil and water department, Atomic Energy Authority. Two rates of organic manure were added (48 and 71.5m3/ha) including untreated control to surface sand soil at depth 20 cm. Neutron moisture meter calibration curve for 30 and 50 cm depth were done, the results showed that a 30 cm depth the neutron calibration curves for three treatments have approximately the same slope, and there is differences in the intercept which were 1.131, 1.298 and 1.978 for rate 2, rate 1 and control, respectively. The values of volumetric soil water content versus count ration presented in Tables 2 and 3 showed that at the same count ratio the values of water content decrease with increasing rate of organic matter in the case of 30cm depth, for 50cm depth the values of soil water content approximately the same at each count.}, keywords = {organic matter,Neutron probe,calibration,Sand soil}, url = {https://ajnsa.journals.ekb.eg/article_20917.html}, eprint = {https://ajnsa.journals.ekb.eg/article_20917_28c9b368630f2af4699211b010bfa5a6.pdf} } @article { author = {Salem, Mahmoud}, title = {Effect of addition of GO Nanoparticles on the tensile properties and deformation temperature of Sn-3.5Ag-0.7Cu lead free solder alloy}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {112-120}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2952.1061}, abstract = {The advantage of lead-liberated welding is the melting point of Sn-Ag-Cu (SAC) alloys in the Sn-rich alloy. The nanoparticles welding with lowering melting point near to the Sn-Pb eutectic point is found more interest. Latterly, the phase persistence of nanoparticles has been the project of massiveness of academic and experiential investigations. In this study, graphene nanoparticles (GNPa) with 0.3 percentages wt.% were successfully added into Sn-3.5Ag-0.7Cu lead-free solder. The effects of graphene nanoparticles (GNPa) on the microstructure, tensile properties, wettability, corrosion resistance, and hardness were subsequently investigated. The results show that graphene nanoparticles (GNPa) refine the microstructure with different features and enhance the wettability efficiently. Stress-strain tests discover that the combined solder with 0.3 wt.% GNPa exhibits about 15% and 25% enhancement in tensile strength and hardness, respectively. In addition, the total elongation of Sn-3.5Ag-0.7Cu is 22% greater than that of the pure Sn-3.5Ag-0.7Cu+0.3GO solder alloy. The enhancing mechanism of 0.3GO on the achievement of combined samples is also studied. Stress strain experiments were inspected under different five strain rates ranging from 5.4x10-5 S-1 to 2.9x10-3 S-1 and different five temperatures extended from R.T. (298K) to 383 K for two alloys. The activation enthalpy suggests that the dominant mechanism is the grain bounding diffusion (GBD). Also, X-ray diffraction examination display the permanence of both β-Sn rich phase and the intermetallic compound Ag3Sn and very little particles or residue from the intermetallic composition γ-In Sn4.}, keywords = {Nanoparticles,Tensile Properties,free solder alloy}, url = {https://ajnsa.journals.ekb.eg/article_21114.html}, eprint = {https://ajnsa.journals.ekb.eg/article_21114_21f59737b05540beb38971f498a7d0a5.pdf} } @article { author = {khader, shaaban and khedr, mona}, title = {A uniform Laser Pulse for a Solid Cylinder by using different theories of magneto thermo elasticity}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {121-130}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2043.1062}, abstract = {This work is concerned with the study of vibrations induced by a laser beam in the context of different theories of magneto thermoelasticity, coupled thermoelasticity (CTE), thermoelasticity with one relaxation time (L-S) and thermoelasticity without energy dissipation (G-L), of an infinitely long solid conducting circular cylinder. The surface of the cylinder is assumed to be traction free. The temporal profile of the laser beam is considered as non-Gaussian. The cylinder is considered to be made of an isotropic homogeneous thermoelastic material put in a uniform magnetic field in the direction of the axis. This produces an induced magnetic field and an induced electric field. Laplace transform techniques are used to derive the solution in the Laplace transform domain. The inversion process is carried out using a numerical method based on Fourier series expansions. The temperature, displacement, stresses, induced magnetic field and induced electric field are calculated numerically then represent the result by graphs.}, keywords = {Magneto Thermoelasticity,Coupled Thermoelasticity,Generalized Thermoelasticity,Non-Gaussian Laser Pulse}, url = {https://ajnsa.journals.ekb.eg/article_21115.html}, eprint = {https://ajnsa.journals.ekb.eg/article_21115_48266d66754b53876d8af882b0abd307.pdf} } @article { author = {esmail, samia and mayhoub, ahmed}, title = {Evaluation of External Beta Absorbed Dose for Contamination of the Skin}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {131-136}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.1961.1008}, abstract = {Skin dose is very difficult to measure directly and is usually estimated. The beta dose rate to the skin expressed in terms of average surface concentrations of a radionuclide on the skin gives more reliable estimates for this exposure pathway. However, the data in the literature vary as much as an order of magnitude. In this study, we calculate external beta-ray dose rate for human skin contamination around an isotropic point source of mono-energetic electrons. The beta-ray doses rates were computed by performing analytical integration of a semi-empirical point dose rate function . Evaluation of the model is realized by calculating the dose rate for the contamination of the skin at different depths for samples of air collected around the Research Reactor located at the Atomic Energy Authority (Egypt). Meandering of the plume i.e., low wind condition is taken into consideration. The above mentioned treatment is applied for different meteorological states, namely different thermal stability classes, A,B,C,D and E. The maximum beta absorbed dose for the contamination of the skin is for stability class E for nuclide of Cs137 at depth of 20m from the skin.}, keywords = {External absorbed dose,Gaussian concentration,analytical treatment,an isotropic point source of mono-energetic electrons}, url = {https://ajnsa.journals.ekb.eg/article_23085.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23085_8757e8474ba5fd654788b4905e1c5661.pdf} } @article { author = {Shager, Azza and Abd El-Latif, Samar}, title = {Experimental studies on DC axial virtual cathode electric discharge}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {137-144}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2818.1060}, abstract = {A new modification is carried out on axial virtual cathode oscillator to improve the device performance. The device operates by virtual cathode theory to generate high power microwave from the interaction between energetic electron beam and virtual cathode field. The electrical parameters are measured to understand the behavior of the discharge by using nitrogen gas. The breakdown potential Vb against Pd is investigated. A single electric probe is used to measure and estimate the plasma parameters. The virtual cathode position is defined from the axial distribution of electron density, axial distribution of electric field and axial distribution of plasma potential. The position of virtual cathode has been estimated to be at about 2cm from the mesh anode which can be confirmed from the electric field changing its direction and from the maximum value of plasma density at that position. The exposed samples to microwave radiation ensure the effects of the microwave radiation on them.}, keywords = {DC discharge,Axial vircator,Virtual cathode,microwave,Electric probe}, url = {https://ajnsa.journals.ekb.eg/article_23087.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23087_e2fbcaa93904dfd33aaf2ed65d21ab1a.pdf} } @article { author = {helmy, salwa and hamza, ahmed and elnaggar, sayed}, title = {Investigation of Thermal Hydraulic Behavior of Dry Spent Fuel Cask Under Forced Convection}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {145-153}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.2995.1064}, abstract = {The thermal hydraulic behavior of the spent fuel in dry storage cask under forced convection mode is experimentally and numerically investigated. For this purpose a test rig is designed and constricted to simulate the cooling loop cask contains 21 spent fuel discharged from pressurized water reactor (PWR). A numerical simulation is performed by ANSYS-CFX fluid dynamic code. The effect of decay heat generation and inlet air velocity are investigated. The results show that the increase in the inlet air velocity improves the coolability of the fuel while the increase in decay heat leads to decrease the coolability of the fuel. Within the range (1.1< V < 2.8 m/s) for inlet air velocity and heaters power (630 < Q < 1260 watt), a new empirical correlation has been obtained for Nusselt number, Nu as a function in Reynolds number, Re. The comparisons between experimental and numerical results show a good agreement.}, keywords = {Spent fuel,Dry Storage cask,thermal hydraulic,forced circulation}, url = {https://ajnsa.journals.ekb.eg/article_23088.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23088_6e213c989a0f888a5288018aabdd450e.pdf} } @article { author = {Hafez, Hanaa and Attia, Lamis and Hendi, Asmaa}, title = {Thermoluminescence and Kinetic Analysis of Gamma Irradiated Some Rocks from Makkah, Saudi Arabia}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {154-160}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.3060.1068}, abstract = {In the present work some rocks were collected from Makkah, Saudi Arabia. Thermoluminescence technique utilized to investigate the ability of the sample to use as an accidental radiation dosimetry. After γ-ray irradiation by Co-60 source, Makkah rocks sample revealed a peak at 155°C. The peak position is decreased with the increase of the γ-dose. Chemical analysis of Makkah rocks were achieved by using XRF technique. The natural fading, the effect of temperature on the ability of the sample to store the TL-signal and the optimum grain size of the sample were studied. The activation energy was calculated by using peak shape method. The TL-signal exhibits a linear response through the gamma dose range 10Gy-10KGy. In this range of exposure the sample under study can be considered as an accidental dosimetry. The natural fading, the effect of temperature on the ability of the sample to store the TL-signal and the optimum grain size of the sample were studied. The activation energy was calculated by using peak shape method.}, keywords = {Thermoluminescence,Fading,Radiation/ Dosimetry. Kinetic Parameters/ Makkah Gabbro rocks}, url = {https://ajnsa.journals.ekb.eg/article_23090.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23090_6f92de99b35857d777537b17f86d505c.pdf} } @article { author = {Shager, Azza and Abd El-Latif, Samar and Ebrahim, Fawzia}, title = {Minimum breakdown parameters through H2, He, N2 and Ar gases}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {161-168}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.3102.1070}, abstract = {The gas discharge plasma has attracted the attention of scientists and technologists because it is a source of electrons and ions beams which are needed and used in several applications and modern instruments. Minimum breakdown voltage of the cylindrical coaxial virtual cathode oscillator is investigated on Nitrogen (N2), Argon (Ar), Helium (He) and Hydrogen (H2) through different anode transparencies. The study includes the effect of secondary electron emission on the minimum breakdown voltage (Vb)min and the product of gas pressure P and inter-electrode distance d, Pdmin. The changes in the minimum breakdown voltage with the gas pressure are studied where pressure is the main factor of electric discharge. Paschen curve is studied through electric discharge for Ar and H2 by using different anode transparencies. This study aims to understand the parameters that can affect the minimum voltage (Vb)min at which the gas transfers from a non-conducting state to a conducting state. The study is carried out on a cylindrical coaxial vircator for different gases and different anode transparencies.}, keywords = {Glow discharge,Coaxial vircator,Anode transparency,Minimum breakdown voltage}, url = {https://ajnsa.journals.ekb.eg/article_23091.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23091_4eef0cafc2d3074dc42e0f58818d4ad2.pdf} } @article { author = {louis, heba}, title = {Investigation of the IAEA benchmark problem using MCNP code}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {169-177}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.3214.1074}, abstract = {The "IAEA PWR benchmark problem" was intended to draw some conclusions about the accuracy of the different neutronic calculation codes used in the routine deterministic reactor calculation. The objective of this paper is to test the MCNP code against previously obtained solutions to provide new reference solutions to the IAEA benchmark with Monte Carlo method. The effective multiplication factor, radial and axial assembly power distributions and zone average group flux were calculated using Monte Carlo code (MCNP). The MCNP results are compared with the results of deterministic solutions in two and three dimensions. Good estimates of effective multiplication factor values and power distributionvalues in two and three dimensions were showed. To assess the MCNP results, the collective percent error measures were investigated. The results of AVG, MRE and RMS error measures were less than 1 % error. So all results presented here are considered an accurate reference solution and can using as Monte Carlo reference for IAEA PWR benchmark problem.}, keywords = {Multi-Group cross section,multiplication factor,power distribution,MCNP code}, url = {https://ajnsa.journals.ekb.eg/article_23149.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23149_12296468c9e3737c85c01e6c5cabd216.pdf} } @article { author = {Shaaban, Ashraf and Hamza, Refaat and El shahat, Amro}, title = {Studying the Ameliorative Effect of Bee Venom Against Damage and Inflammation Induced in Gamma-Irradiated Rats}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {178-184}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.3107.1071}, abstract = {The aim of this study was focused on investigating the possible protective effect of Bee Venom (BV) against gamma radiation induced damage and inflammation in male rats. Gamma-irradiation (6 Gy) resulted in a significant elevation in the level of tumor necrotic factor-alpha (TNF-α) , interleukin-6 (IL-6) , creatinine kinase-MB (CK-MB) and cardiac troponin I (cTnI), lactate dehydrogenase (LDH), creatine phosphokinase (CPK), serum aspartate transaminase (AST) and alanine transaminase (ALT) , serum glucose, malondialdehyde (MDA) concentration and xanthine oxidase activity associated with remarkable decrease in insulin level, glutathione content (GSH) and the activity of xanthine dehydrogenase (XDH), superoxide dismutase (SOD) and catalase (CAT) in heart and liver tissues compared to control group. Injection of BV (5ml/kg b. wt. / day/6weeks) to γ-irradiated rats was found to offer protection against γ-irradiation induced oxidative stress and significantly ameliorated the changes occurred in the above investigated biochemical parameters. It could be concluded that Bee venom clarified a modulatory role against gamma radiation induced oxidative damage and inflammation in the heart and liver tissues.}, keywords = {Bee venom,Gamma Irradiation,Inflammation,antioxidants}, url = {https://ajnsa.journals.ekb.eg/article_23351.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23351_7434a4eceb54abb452187900d2b15943.pdf} } @article { author = {Amar, Ahmed}, title = {Discrepancy of Astrophysical S-Factor.}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {185-192}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.3204.1073}, abstract = {Optical potential parameters have been discussed as an art more than physics. The effects of optical model parameters (OMPs) on differential cross section calculations and hence extraction of spectroscopic factor has been discussed. Optical model parameters have been expected especially for charged particles with light nuclei. The ambiguity of the optical potential parameters has been solved. Global optical potential parameters have been explained as not the best choice for extraction spectroscopic factor and hence calculate astrophysical S-factor. The measurements of experimental data have been discussed as the most important parameter that produces discrepancy in the astrophysical S-factor. The models used to extract spectroscopic factor is briefly discussed where examples are discussed. The importance of astrophysical s-factor has been explained under nuclear models. Few models have been chosen as just examples of discrepancy of astrophysical S-factor in spite of there are many models deal with such point of view. The discussion has neglected some effects of extraction astrophysical S-factor as coulomb barrier and electron screening.}, keywords = {Optical Model Parameters,Spectroscopic Factor,astrophysical S-factor,Experimental Data}, url = {https://ajnsa.journals.ekb.eg/article_23352.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23352_b3fbbae1575a6c83c6c06b6a07dd0a98.pdf} } @article { author = {salem, ehab and naweto, mohamed and mahmoud, mahmoud}, title = {Effect of Irradiation and Edible Coating as Safe Environmental Treatments on The Quality and The Marketability of “ Anna “ Apples During Cold Storage}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {193-202}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.5418.1123}, abstract = {The present study was carried out during two successive seasons of 2014 and 2015 on “Anna“ apples . The effect of gamma irradiation of 0.5and 1.0 kGy in addition to edible coating with paraffin oil and glycerol on the shelf-life and quality of apples during cold storage at 0°C, 90-95% RH for 90 days was evaluated . Gamma irradiation 0.5 and 1.0 kGy caused a reduction in blue mold incidence (%) caused by Penicillium expansumin from 20.2% to 10.0% and 6.5% after 90 days cold storage hawever , in artificial inoculated fruits blue mold incidence reduced from 40% to 20.2% and 18.7% after 30 days . At 60 days this level was reduced from 85% to 36.1% and 30% . While at the end of cold storage period blue mold was reduced from 100% to 55.7% and 42.1%, respectively. The results indicated that irradiation and edible coating greatly affected storage quality of apples. Edible coating paraffin oil or glycerol as well as irradiation of 1.0 kGy were effective in increasing storability of apples during storage compared to 0.5 kGy irradiation doses. These treatments decreased discarded and weight loss percentage and increased firmness, shelf life and calcium flesh of apples content . It could be noticed that untreated apples could be stored for 60 days where the treated ones by irradiation of 0.5 kGy could be stored for 75 days. However edible coated apples or irradiation with 1.0 kGy could increase the storage period to be 90 days.}, keywords = {Irradiation,Edible coating paraffin oil or glycerol,Fungal mold,Anna apples,Treatment,shelf- life,Marketability}, url = {https://ajnsa.journals.ekb.eg/article_23357.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23357_0c98129726c41960c4e38082e52317d2.pdf} } @article { author = {abdelmoniem, nagwa}, title = {Electric Field Effect on Soot Formation and Collection from Diffusion Flames}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {203-210}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.4100.1095}, abstract = {characterization of combustion-formed particulate matter for possible applications as optoelectronic organic materials is studied. A copper probe is inserted at different heights above the burner hole. Probe sampling si followed by collection via particles impactor, containing two main different classes of materials, soot and nanoparticles of organic carbon (NOC). Soot (Carbon) particles are collected from laminar and turbulent diffusion flames by means of a DC electric field in the form of chains and clusters. The great majority of soot particles are found to be positively charged. The I-V characteristics are measured in order to estimate the electrical properties during soot collection. The electric current increases as the collection time increases due to the agglomeration of charged soot particles on the copper probe. It is observed that the activation energy Ea increases with increasing probe height H till reaching a maximum value. The mobility of ions for soot particles decrease with the applied potential and increases with the probe height for the turbulent and laminar diffusion flame. The compositions of soot powder samples are investigated by energy dispersive X-ray pattern (EDX) and the size of the soot particles are calculated by dynamic light scattering (DLS) technique.}, keywords = {soot,combunsion,fuel}, url = {https://ajnsa.journals.ekb.eg/article_23355.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23355_e141c1ee555995efce02a32689d331be.pdf} } @article { author = {Abdel Hakam Mahdy, Rania and Ghazala, Reda}, title = {Evaluation Study for Uranium Adsorption from Gattar Pilot Plant Pregnant Solution by Egyptian Bentonite Sediments}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {211-220}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.4302.1101}, abstract = {Bentonite deposits have a great potential for using an engineering barrier in the multicarrier system of deep geological repository. In this paper, Egyptian clay sediments of bentonite collected from El Sahel EL Shamally (North Coast-H) West Alexandria, Egypt. Firstly, complete characterizations of the bentonite clay sediments such as complete chemical analysis of major oxides and trace elements, XRD and IR spectroscopy were performed. The bentonite clay sediment adsorption factors towards anionic uranium species were also investigated such as the ratio of the clay sediment to the pregnant uranium solution (S/L ratio), the uranium pregnant solution initial concentrations and its pH and the agitation time ranging from 30 to 240 min. Uranium adsorption optimum conditions by bentonite sediments are as follow: S/l 1:2, pH=6, agitation time 120 min., temperature 30 oC and uranium concentration 70 ppm giving about 70% adsorption efficiency. On the other hand, uranium desorption efficiency percent obtained was 78% using 1M HCl for 3 cycles and 69% using 1 M NaCl for 3 cycle.}, keywords = {Clay sediments,Egyptian bentonite,Uranium,pregnant solution}, url = {https://ajnsa.journals.ekb.eg/article_23356.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23356_44465acfd5f1a8c60bab6ab4871fb8c9.pdf} } @article { author = {Seyyedi, Seyyed Masoud and Hashemi-Tilehnoee, Mehdi and Khaleghi, Masoud}, title = {Allocating the residues cost of a typical HTGR directly integrated with steam cycle using distributed entropy method}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {221-233}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2018.3875.1092}, abstract = {Exergetic cost theory (ECT) method, is a conventional exergoeconomic analysis method. In energy systems, disposing of remaining flows of matter or energy is called residues. Distributed entropy (DE) method is an important method for allocating the residues cost. In this study, ECT method and the DE method are applied to a high-temperature gas-cooled reactor (HTGR) that coupled with the steam cycle through the heat exchanger. Exergetic cost and exergoeconomic cost are obtained for each stream. Then residues cost distribution ratio is calculated by ECT and DE methods. The results have been compared with a model that is based on the disaggregation of physical exergy into its enthalpic and entropic terms which known as “H&S” model. The results show that DE method performed similar to the H&S model, but the DE method is a rational criterion to allocate the cost of the residues. The unit product cost of HTGR turbine and steam turbine are calculated as 0.2526 cents/kWh and 1.1500 cents/kWh, respectively. The maximum product unit exergoeconomic cost value is 3.1420 cents/kWh that is corresponding to steam cycle superheater.}, keywords = {Exergoeconomic,residues,Cost allocation,Exergetic cost theory,Distributed entropy,HTGR}, url = {https://ajnsa.journals.ekb.eg/article_23353.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23353_bb5fdb268f0245022487bd5a82ca07d9.pdf} } @article { author = {farag, omar}, title = {A Comparative Study of Surface Modification of PS Films Using DC Glow Discharge Plasma in N2 and Ar}, journal = {Arab Journal of Nuclear Sciences and Applications}, volume = {52}, number = {1}, pages = {234-242}, year = {2019}, publisher = {Egyptian Society of Nuclear Sciences and Applications (ESNSA)}, issn = {1110-0451}, eissn = {2090-4258}, doi = {10.21608/ajnsa.2019.23358}, abstract = {In this paper, the polystyrene (PS) film surface was treated using DC glow discharge nitrogen (N2) and argon (Ar) plasma to improve the wettability and antibacterial properties. The untreated and plasma treated surfaces were characterized by contact angle, FTIR, XRD and SEM analysis. The antibacterial activity of untreated and plasma treated PS films was evaluated using optical density (OD) technique against Staphylococcus aureus bacteria. The results of the PS film surface treated in both N2 and Ar showed a noticeable increase in the wettability due to the increase in the roughness and the introduction of oxygen-containing polar groups as corroborated with SEM, weight loss calculations and FTIR spectra. The results of antibacterial activity showed that the treated samples inhibit the bacterial growth. The Ar treatment created more oxygen-containing polar groups and increase roughness on the PS film surface and extensively modified the polymer surface than the N2 treatment. }, keywords = {DC plasma,Surface modification,Polymer film,Hydrophilicity,Antibacterial activity}, url = {https://ajnsa.journals.ekb.eg/article_23358.html}, eprint = {https://ajnsa.journals.ekb.eg/article_23358_23dfe4fb9ee4c410b6d635103fe38711.pdf} }