Arab Journal of Nuclear Sciences and Applications最新文献_第7页

Nano Magnesium Aluminum Layered Double Hydroxide As A base Material For Chromatographic 99Mo/99mTc Column Generator. 纳米镁铝层状双氢氧化物作为99Mo/99mTc色谱柱发生器的基材。

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-04-10 DOI: 10.21608/ajnsa.2023.174941.1683

Hanem Saber, M. Mostafa, Sami El Bayoumi, E. Saad

引用次数: 0

Assessment of linear, mass attenuation coefficients and effective atomic numbers in some polymers for use as gamma-ray shields 一些用作伽马射线屏蔽的聚合物的线性、质量衰减系数和有效原子序数的评估

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-04-10 DOI: 10.21608/ajnsa.2023.164882.1642

Samah Elsayed

引用次数: 0

Legal Frame of Nuclear and Radiological Programs in Generals And the Egyptians Programs in Special Part2. Egyptian Nuclear and Radiological Programs 核与辐射项目的一般法律框架和埃及项目的特殊法律框架第二部分。埃及核与辐射项目

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-04-01 DOI: 10.21608/ajnsa.2023.144749.1598

Mohamed Ahmed, Farouk Abd El-Rahman

引用次数: 0

A Study on Heavy-Ion Fusion Reactions at Extreme Subbarrier Energies 极端亚载流子能量下的重离子聚变反应研究

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-03-28 DOI: 10.1501/nuclear.2023.60

H. Chabrak, B. Gönül

引用次数: 0

Excited Energy Spectra for He and Be Isotopes from Different Shell Model Interactions 来自不同壳模相互作用的 He 和 Be 同位素激发能谱

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-03-28 DOI: 10.1501/nuclear.2023.59

İ.A. Bektemir, S. Akkoyun

引用次数: 0

Influence of symmetry energy on neutron skin thickness of 40Ca, 48Ca, 90Zr, 116Sn, 144Sm and 208Pb 对称能对40Ca、48Ca、90Zr、116Sn、144Sm和208Pb中子皮厚度的影响

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-01-26 DOI: 10.21608/ajnsa.2023.161509.1635

Shayma&#;a Amin, A. Taqi, A. AL-RUBAIEE

引用次数: 0

Theoretical study on the quantum well junction CrI3 / CrGeTe3 CrI3/CrGeTe3量子阱结的理论研究

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-01-26 DOI: 10.21608/ajnsa.2022.150893.1616

S. Soliman, M. Salah

{"title":"Theoretical study on the quantum well junction CrI3 / CrGeTe3","authors":"S. Soliman, M. Salah","doi":"10.21608/ajnsa.2022.150893.1616","DOIUrl":"https://doi.org/10.21608/ajnsa.2022.150893.1616","url":null,"abstract":"Electronic structure calculations were conducted for the CrI3/CrGeTe3 junction with different separations ( z ) between the two slabs, CrI3 and CrGeTe3, which provide a means to resolve the magneto-volume spin coupling. The calculations demonstrate that high electron mobility, high frequency, and strongly electronic structure modification are obtained at a specific value for slab separation ( z ). z =0.36238, which is equivalent to the insulating separation of 13.85 Å, is preferable for free-to-move carriers, while the spin wave maximum is at z=18 Å. The moment observed in the DOS of the CrI3 layer supports an increase in the surface field, which, in turn, explains the effectiveness of the CrI 3 layer in tunneling applications. The CrI3 Fermi surface contains small electronic pockets derived from the Cr-3d doubly degenerate state at M. The doubly degenerate effective mass 𝒎 ∗ is approximately constant near the bottom of the nearly free electron band, but the triply 𝒎 ∗ increases somewhat at the inflection point by the Cr-3d magnetic field. Depending on the number of d-electrons, the junctions CoMnI3/CrGeTe3, MoI3/CrGeTe3 and WI3/CrGeTe3 are examined. The comparison between CoMnI3, MoI3 and WI3, and CrI3 ensures that the performance of the CrI3 layer is due to the activity of Cr-3d, which provides a unique opportunity to control the junction properties. The DOS shape of the MoI3 layer demonstrates fairly interesting magnetic properties that are nearly similar to those of the CrI3 layer.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43715590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of gamma ray attenuation properties of normal concrete with some nano materials using Monte Carlo simulation and experimental measurements. 用蒙特卡罗模拟和实验测量评价几种纳米材料对普通混凝土的γ射线衰减性能。

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-01-26 DOI: 10.21608/ajnsa.2023.173903.1678

Rsaha Elsadany, Rasha Elsadany, Sherif H. Al-Tersawy, Khaled Metwaly, Wael Elgammal

{"title":"Evaluation of gamma ray attenuation properties of normal concrete with some nano materials using Monte Carlo simulation and experimental measurements.","authors":"Rsaha Elsadany, Rasha Elsadany, Sherif H. Al-Tersawy, Khaled Metwaly, Wael Elgammal","doi":"10.21608/ajnsa.2023.173903.1678","DOIUrl":"https://doi.org/10.21608/ajnsa.2023.173903.1678","url":null,"abstract":"The linear attenuation coefficient of normal weight concrete containing nanoparticles has been simulated using Monte Carlo transport code MCNP5 to evaluate their shielding performance. The outcomes of the numerical simulations were compared to the experimental samples computed with Cesium 137 (0.662 MeV) and XCOM program results. Three different nanoparticles mainly nano silica (NS), nano ceramic (NC), and nano metakaolin (NMK), and their hybridization were used in the present research. Slump test, density, water absorption, compressive strength and tensile strength were investigated. Moreover, the scanning electron microscopy technique (SEM), X ray diffraction analysis (XRD) were used to prove the improvement in the microstructure of concrete as a result of the use of NS, NC, NMK, and their hybridization. The results in the present study indicate that the inclusion of single nanomaterials as a replacement of cement improves the mechanical, physical, properties and the linear attenuation coefficient of concrete, while the results of the hybrid nano inclusion showed a slight improvement of the properties of concrete. In addition, the results of the simulation of the linear attenuation coefficient using the Monte Carlo simulation were in good agreement with the experimental and XCOM program results.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48874643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of Radon Radioactivity and Radiological Impact by Using Solid-State Nuclear Track Detector for Erediya younger granites of Central Eastern Desert in Egypt 用固态核径迹探测器评价埃及中东部沙漠Erediya年轻花岗岩的氡放射性和辐射影响

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-01-26 DOI: 10.21608/ajnsa.2022.160908.1632

Mohamed Mitwalli, Fatma Qabeeli, A. El-Khatib, Mahmoud A. Abaas, G. Saleh

引用次数: 2

Preparation and Stabilization of Monoclinic Zirconia by Yttria through Mechanical Alloying 氧化钇机械合金化制备单斜氧化锆及其稳定性研究

Arab Journal of Nuclear Sciences and Applications Pub Date : 2023-01-26 DOI: 10.21608/ajnsa.2022.161293.1634

wagih eldesouky, Ahmed Abd El_Kareem, hussein abd el-aziz, E. Mosa

{"title":"Preparation and Stabilization of Monoclinic Zirconia by Yttria through Mechanical Alloying","authors":"wagih eldesouky, Ahmed Abd El_Kareem, hussein abd el-aziz, E. Mosa","doi":"10.21608/ajnsa.2022.161293.1634","DOIUrl":"https://doi.org/10.21608/ajnsa.2022.161293.1634","url":null,"abstract":"Yttria-stabilized zirconia is a vital material for a variety of high-tech industrial applications. Fully stabilized zirconia is an excellent material for manufacturing of solid electrolyte for solid oxide fuel cell. In the present study, high purity zirconia was successfully synthesized from Egyptian zircon. The produced zirconia was subsequently fully stabilized by 10 mol% yttria via mechanical alloying. Mechanical alloying was conducted in a planetary ball mill with; stainless steel milling assembly, at a rotation speed of 350 rpm, and ball to powder weight ratio of 10. The effect of milling time (up to 32 h) on phase transformation was studied. Characterization of the as prepared zirconia and milled samples was conducted by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis. The obtained results revealed that, the crystal structure of the prepared zirconia is monoclinic. The degree of stabilization and the level of contamination increase gradually with the course of milling. Under the described conditions, the required time for full stabilization was 32 h. The produced powder is nanocrystalline (13.7 nm) with a submicron particle size.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49252535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0