发布求助
文献互助 智能选刊 最新文献

Journal of Nuclear Research and Applications最新文献

筛选
英文 中文
Ab Initio Study of Mechanical and Vibrational Characteristics of Uranium Monoxide in Nuclear Reactor 核反应堆中一氧化铀机械和振动特性的 Ab Initio 研究
Journal of Nuclear Research and Applications Pub Date : 2023-11-12 DOI: 10.24200/jon.2023.1070
M. Sahafi, E. Cholaki
{"title":"Ab Initio Study of Mechanical and Vibrational Characteristics of Uranium Monoxide in Nuclear Reactor","authors":"M. Sahafi, E. Cholaki","doi":"10.24200/jon.2023.1070","DOIUrl":"https://doi.org/10.24200/jon.2023.1070","url":null,"abstract":"By using density functional theory and the ab initio method for projector augmented wave pseudopotential parameterization, the mechanical and phonon properties of UO in the rock-salt phase have been systematically calculated. At null pressure and temperature, the obtained lattice constant is in good agreement with the experimental one. Mechanical stability is confirmed because the positive elastic constants meet the Born-Huang criteria. Mechanical properties including bulk modulus, shear modulus, and Young’s modulus are evaluated using the Voigt-Reuss-Hill approximation. The value of Poisson’s ratio ( v ) is nearly 0.36, which shows that this compound has an ionic bond and interatomic forces within the crystal are central. The elasticity analysis of the Kleinman parameter reveals that bond bending is dominant within the substructure of UO. The vibrational density of states and phonon dispersion are investigated through the linear response approach. The results show the dynamical stability of crystalline structure due to the inexistence of virtual frequencies in dispersion relations.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"110 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139279579","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
A hybrid CFD-DSMC Method for Numerical Simulation of the Rotating Cylinder Flows 用于旋转气缸流动数值模拟的 CFD-DSMC 混合方法
Journal of Nuclear Research and Applications Pub Date : 2023-11-01 DOI: 10.24200/jon.2023.1071
V. Ghazanfari, M. Shadman, F. Mansourzadeh
{"title":"A hybrid CFD-DSMC Method for Numerical Simulation of the Rotating Cylinder Flows","authors":"V. Ghazanfari, M. Shadman, F. Mansourzadeh","doi":"10.24200/jon.2023.1071","DOIUrl":"https://doi.org/10.24200/jon.2023.1071","url":null,"abstract":".","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139296178","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
Performance Assessment of a Channel Multi-pinhole Collimator for Myocardial Perfusion Imaging with SPECT: A Monte Carlo Simulation 通道多针孔准直器在SPECT心肌灌注成像中的性能评估:蒙特卡罗模拟
Journal of Nuclear Research and Applications Pub Date : 2023-09-01 DOI: 10.24200/jon.2023.1066
Z. Mohebbi, E. Saeedzadeh, H. Mahani
{"title":"Performance Assessment of a Channel Multi-pinhole Collimator for Myocardial Perfusion Imaging with SPECT: A Monte Carlo Simulation","authors":"Z. Mohebbi, E. Saeedzadeh, H. Mahani","doi":"10.24200/jon.2023.1066","DOIUrl":"https://doi.org/10.24200/jon.2023.1066","url":null,"abstract":"While conventional parallel-hole collimators are widely used in myocardial perfusion imaging (MPI) with SPECT, they are suboptimal in balancing the existing sensitivity-resolution compromise. Therefore, multi-pinhole collimation has been proposed to address the problem. In the present study, a channel multi-pinhole collimated SPECT scanner is modeled and then simulated using GATE Monte Carlo simulation. The multi-pinhole collimator comprises eight apertures. The material, diameter, and height of the apertures were assumed to be varying. A comparison with a conventional single-pinhole was also conducted. The results show that increasing the hole diameter leads to degraded spatial resolution for the multi-pinhole collimator. Compared to single-pinhole collimators, multi-pinhole collimators suffer from projection overlapping and thus deteriorated spatial resolution. The findings confirm that the channel multi-pinhole collimators outperform the single-pinhole apertures by providing much higher sensitivity at the expense of slightly lower spatial resolution and therefore would be the collimator of choice for MPI with SPECT.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131965996","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
Investigation of impact of using the ICRP 110 adult reference phantoms and ICRP 103 tissue weighting factors on the radiopharmaceutical’s effective dose 使用ICRP 110成人参考幻影和ICRP 103组织加权因子对放射性药物有效剂量影响的研究
Journal of Nuclear Research and Applications Pub Date : 2023-09-01 DOI: 10.24200/jon.2023.1065
A. Sadre Momtaz, F. Safarnejad
{"title":"Investigation of impact of using the ICRP 110 adult reference phantoms and ICRP 103 tissue weighting factors on the radiopharmaceutical’s effective dose","authors":"A. Sadre Momtaz, F. Safarnejad","doi":"10.24200/jon.2023.1065","DOIUrl":"https://doi.org/10.24200/jon.2023.1065","url":null,"abstract":"The effective dose is an important tool in the radiation protection community. This is because it represents the health risk associated with different procedures involving ionizing radiation, and therefore it allows comparing them. Therefore, accurate determination of the effective dose for nuclear medicine procedures is important. In this study, the effective dose per unit activity administered was calculated for some of the 99m Tc-based radiopharmaceuticals. The MIRD method was used for the calculation of the organ’s absorbed doses using the ICRP 110 adult male and female reference phantoms. The biokinetic data was taken from ICRP Publications 128 and 53. Then, the effective doses were calculated using the ICRP 103 tissue weighting factors. The results show that with some exceptions, the calculated effective doses based on new phantoms and tissue weighting factors are lower than the ICRP published data. This reduction is significant in some cases and can significantly reduce the collective effective dose of patients.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"54 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124370078","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
Improvement of Scintillation Detection System using Plasmonic Aluminum Photocathode 等离子体铝光电阴极闪烁检测系统的改进
Journal of Nuclear Research and Applications Pub Date : 2023-09-01 DOI: 10.24200/jon.2023.1064
H. Zaki Dizaji, A. Arabkhorasani, J. Khalilzadeh, Y. Shahamat
{"title":"Improvement of Scintillation Detection System using Plasmonic Aluminum Photocathode","authors":"H. Zaki Dizaji, A. Arabkhorasani, J. Khalilzadeh, Y. Shahamat","doi":"10.24200/jon.2023.1064","DOIUrl":"https://doi.org/10.24200/jon.2023.1064","url":null,"abstract":"A large category of nuclear radiation detection systems are based on scintillation detectors. One of the most important and effective subsystems in performance of scintillation detectors is photomultiplier tube. Photomultiplier tubes with plasmonic photocathodes increase efficiency and decrease dead time. In this research, in order to improve the efficiency and optical response of the photocathode, the plasmonic phenomenon has been used and a new photocathode has been designed and simulated. By periodic circular nanocavities on the surface of aluminum metal, a structure is presented that by making it possible to pair the incoming light to an electron density wave on the surface, plasmonic intensification is created in the desired wavelength range and the field intensity increases greatly. In this way, the quantum efficiency of the photocathode is improved and the detection efficiency is increased up to 15 times compared to the previous cases.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129664886","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
Plasma Mismatching with Microwave Transmission Characteristics for Diagnostic Purposes 等离子体错配与微波传输特性诊断
Journal of Nuclear Research and Applications Pub Date : 2023-09-01 DOI: 10.24200/jon.2023.1067
E. Noori
{"title":"Plasma Mismatching with Microwave Transmission Characteristics for Diagnostic Purposes","authors":"E. Noori","doi":"10.24200/jon.2023.1067","DOIUrl":"https://doi.org/10.24200/jon.2023.1067","url":null,"abstract":"Many remote diagnostic systems rely on the transmission and reflection of electromagnetic waves. In diagnostics facilities such as microwave reflectometers which operate in the cut-off frequency range, the collisionality of the plasma can affect the transmission and reflection characteristics of electromagnetic waves. In this paper, plasma mismatching and reflection properties of microwave propagation through partially ionized, uniform, and cold plasma were studied. Using the simplified Lorentz model of the plasma and associated dispersion relation of electromagnetic wave propagation through collisional, cold plasma, propagation characteristics of the electromagnetic waves were investigated in different collisional regimes of single-interface and double-interface, bounded plasma. It was found that in the cut-off frequency range, the propagation coefficients of the electromagnetic wave can be significantly affected depending on the collision frequency of the plasma. It was also found that in the double-interface case, the thickness of the plasma can cause multiple reflections in the plasma slab, and such reflections can be suppressed in the high-loss collisional regime.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126375720","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
The Comparison of Wheat Growth Indicators Under the Influence of Different Treatments of Cold Plasma and Plasma-Activated Water 冷等离子体和等离子体活化水不同处理对小麦生长指标影响的比较
Journal of Nuclear Research and Applications Pub Date : 2023-09-01 DOI: 10.24200/jon.2023.1068
A. Naeimabadi, M. Nohekhan, M. Bakhtiyari Ramezani
{"title":"The Comparison of Wheat Growth Indicators Under the Influence of Different Treatments of Cold Plasma and Plasma-Activated Water","authors":"A. Naeimabadi, M. Nohekhan, M. Bakhtiyari Ramezani","doi":"10.24200/jon.2023.1068","DOIUrl":"https://doi.org/10.24200/jon.2023.1068","url":null,"abstract":"In this paper, the direct effects of gliding arc discharge (GAD), dielectric barrier discharge (DBD), and argon plasma jet (APJ) discharge as generators of reactive oxygen and nitrogen species (RONS) on wheat seed yield have been evaluated. This evaluation was conducted for a period of eight months in fall planting. The plasma-activated water was used for irrigation during this period. Physical quantities of the plant, such as length, weight as well as panicle length, neck diameter, weight, number of seeds per panicle, and grain weight were Appropriate comparisons were made on the measurements. The results indicated that cold atmospheric pressure plasma increased plant length and biomass. Moreover, the length and diameter of the panicle also increased which resulted in a relative increase in the number and weight of seeds. Therefore, it can be claimed that cold plasma has a positive effect on the growth and reproduction of wheat.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126846129","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
Removal of Phenol from Steel Industry Wastewater by using Electron Beam 电子束法去除钢铁工业废水中的苯酚
Journal of Nuclear Research and Applications Pub Date : 2023-09-01 DOI: 10.24200/jon.2023.1063
P. Kazemi, A. Akhavan, M. Athari Allaf
{"title":"Removal of Phenol from Steel Industry Wastewater by using Electron Beam","authors":"P. Kazemi, A. Akhavan, M. Athari Allaf","doi":"10.24200/jon.2023.1063","DOIUrl":"https://doi.org/10.24200/jon.2023.1063","url":null,"abstract":".","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"95 1-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289176","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
Preparation and Characterization of Nano porous Silica Glasses for Nuclear waste Immobilization 核废料固定化用纳米多孔硅玻璃的制备与表征
Journal of Nuclear Research and Applications Pub Date : 2023-06-22 DOI: 10.24200/nst.2023.0623
Z. Hamnabard, M. Taghavi, M. Mohebi, A. Yadollahi
{"title":"Preparation and Characterization of Nano porous Silica Glasses for Nuclear waste Immobilization","authors":"Z. Hamnabard, M. Taghavi, M. Mohebi, A. Yadollahi","doi":"10.24200/nst.2023.0623","DOIUrl":"https://doi.org/10.24200/nst.2023.0623","url":null,"abstract":"The current study investigates crystallization and phase separation of a borosilicate glass composition in the system Na 2 O–CaO–Al 2 O3–B 2 O 3 –SiO 2 used for nuclear waste immobilization. At first, base glass composition was prepared by mixing and homogenizing of pure raw materials, melting in an alumina crucible and then casting in a stainless steel mold. Mo 2 O 3 was added in constant values of 0.5, 1.5, 2.5, and 3.5% mole. XRD analysis was carried out to ensure no crystalline phases were formed. Heat treatment was performed at temperature intervals of 620, 650, 680 and 710°C. To study phase separation creation, SEM analysis was carried out. In the next step, acid leaching of phase-separated glasses was performed. Porosity analysis and measurement of specific surface area by BET were performed on acid-leached samples. The results show all samples demonstrate different amounts of phase separation. Also, the highest specific surface area was related to the sample containing 1.5% mole Mo 2 O 3 with two acid-washing steps.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134573512","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 GEANT4 and COMSOL Multiphysics Coupling Capabilities by Simulation of an Optimized Betavoltaic Battery GEANT4与COMSOL多物理场耦合性能的优化倍他伏打电池仿真评价
Journal of Nuclear Research and Applications Pub Date : 2023-06-22 DOI: 10.24200/nst.2023.0622
D. Ghasemabadi, H. Zaki Dizaji, M. Abdollahzadeh
{"title":"Evaluation of GEANT4 and COMSOL Multiphysics Coupling Capabilities by Simulation of an Optimized Betavoltaic Battery","authors":"D. Ghasemabadi, H. Zaki Dizaji, M. Abdollahzadeh","doi":"10.24200/nst.2023.0622","DOIUrl":"https://doi.org/10.24200/nst.2023.0622","url":null,"abstract":"A beta-voltaic battery design can be used to evaluate the functionality of the GEANT4 code and COMSOL Multiphysics software. The spatial distribution of the deposited energy for the beta particles in the semiconductor transducer has been simulated by using the GEANT4 and then, the electron-hole pair generation rate has been obtained. Subsequently, output performances of the battery such as the current-voltage (I–V) characteristics and the maximum electrical power have been determined by using the COMSOL Multiphysics in which the electron-hole pair generation rate from the GEANT4 simulation was utilized as input. Validation is done by considering an optimized planar betavoltaic battery. The results of the current study have been compared with other articles. The results are in good agreement and the relative errors are less than 8%. Our simulation model can be extended to the betavoltaic batteries with other semiconductors and radioactive isotopes and can provide a powerful tool for predicting the output performance and optimizing the betavoltaic batteries.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128376765","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信