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Studying the Radioactivity of Local and Imported Cars Oil in Baghdad Using High Purity Germanium Detector 用高纯锗探测仪研究巴格达本地和进口汽车油的放射性
Pub Date : 2017-03-03 DOI: 10.11648/J.NS.20170202.12
Nada Farhan Kadhim, O. H. Adnan, A. Ridha
The radioactivity of fifteen cars oil samples were be studied in this research, eight of them are local collected from the fuel station in Baghdad, the remaining seven are imported from different origins collected from local markets of Baghdad. The specific activity of the detected radionuclides were be measured by the spectral analysis technique of gamma-ray using high purity germanium (HPGe) detector. It was also a calculation of radiation risk factors; and the specific effective activity (Aeff), which was calculated for the first time in this research. Eight radionuclides were be detected in this work, 226Ra, 214Pb and 214Bi which belong to the uranium-238 series and 212Pb, 208Tl and 228Ac which belong to Th-232 series in addition to 40K and 137Cs. The results shown that the radium equivalent activity (Raeq) were 1.73 -13.72 Bq/l, the absorbed gamma dose rate (Dˠ) were 0.82 -6.24 nG/h, the representative gamma index (Iγr) were 0.012-0.096, the indoor annual effective dose equivalent (AEDE) in were 0.004 - 0.03m Sv/y, the outdoor annual effective dose equivalent (AEDE) out were 0.002-0.037 mSv/y, and the internal hazard index (Hint) 0.009-0.052, the external hazard index (Hext) 00.5-0.037. Another factor has been calculated for the first time in this research it’s the specific effective activity (Aeff) which is ranged between 1.76 and 13.26 Bq/l. The obtained results were compared with the worldwide average; it was within the recommended values. That mean, oils used in automobile engines are safe, valid for consumption and does not pose a danger to society and the environment.
本研究对15个汽车油样品进行了放射性研究,其中8个样品是在巴格达的加油站当地采集的,其余7个样品是在巴格达当地市场从不同来源进口的。利用高纯锗(HPGe)探测器,用伽马射线光谱分析技术测定了所检测到的放射性核素的比活度。这也是对辐射风险因素的计算;比有效活性(Aeff),本研究首次计算了比有效活性。在此工作中检测到8种放射性核素,226Ra, 214Pb和214Bi属于铀-238系列,212Pb, 208Tl和228Ac属于Th-232系列,此外还有40K和137Cs。结果表明,辐射当量活度(Raeq)为1.73 ~ 13.72 Bq/l,吸收γ剂量率(D - h)为0.82 ~ 6.24 nG/h,代表性γ指数(i - γ - r)为0.012 ~ 0.096,室内年有效剂量当量(AEDE)为0.004 ~ 0.03m Sv/y,室外年有效剂量当量(AEDE)为0.002 ~ 0.037 mSv/y,内部危害指数(Hint)为0.009 ~ 0.052,外部危害指数(Hext)为00.5 ~ 0.037。本研究还首次计算了比有效活性(Aeff),其范围在1.76 ~ 13.26 Bq/l之间。所得结果与世界平均水平进行了比较;它在推荐值之内。这意味着,用于汽车发动机的油是安全的,可以有效使用,不会对社会和环境构成危险。
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引用次数: 0
PIXE Elemental Analysis of Boroujerd’s Tap Water Boroujerd自来水的PIXE元素分析
Pub Date : 2017-02-21 DOI: 10.11648/j.ns.20170202.11
A. Ansarinejad, Goudarzi Maryam, Moradi Mahmoud
In this study, we carried out Particle Induced X-ray Emission (PIXE) analysis of tap water from several houses located in different parts of Borojerd city In Iran. A 2.0 MeV proton beam was employed to excite the samples. The concentration of these elements varied from one month to other depending on session but the average elemental concentrations during a complete year seams invariant. The main objective of this work was to characterize and to monitor the trace elements in drinking water, as well as to provide valuable information about the levels of heavy metallic pollutions. The experimental results of trace elements analysis of drinking water of city of Borujerd which was sampled in different months during a year, has been presented by a spectrum of X-rays (in mg/lit) and graphs of quality concentration of elements. Our results were within the permissible limits reported by International standards, and WHO guidelines for drinking water quality and could be observed that the drinking water of Borojerd lacks any toxic trace elements and heavy metals.
在这项研究中,我们对位于伊朗Borojerd市不同地区的几所房屋的自来水进行了粒子诱导x射线发射(PIXE)分析。采用2.0 MeV质子束对样品进行激发。这些元素的浓度随季节而变化,但全年的平均元素浓度几乎不变。这项工作的主要目的是表征和监测饮用水中的微量元素,并提供有关重金属污染水平的宝贵资料。本文用x射线光谱(mg/lit)和元素质量浓度图对一年中不同月份的博鲁耶德市饮用水进行了微量元素分析。我们的结果在国际标准和世界卫生组织饮用水质量指南的允许范围内,可以看出Borojerd的饮用水不含任何有毒微量元素和重金属。
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引用次数: 0
Experimental Investigation of Damage Detection Based on a Novel Optical Method 基于新型光学方法的损伤检测实验研究
Pub Date : 2017-02-21 DOI: 10.11648/J.NS.20170201.15
M. Sandor, James Cheung
In this article, the stress concentration in homogenous material was studied using an optical method of caustics. The study on stress concentration is of great research value to evaluate the damage inside materials. In this work, one optical experimental method, caustics method, is introduced to study the mechanical behavior of an elastic plate of transparent material. The governing equations of caustics method which is used to represent the optics-mechanics relation of the singular yield close to the external load are derived based on the exponential asymptotic expansion. The experimental result shows this optical method as a nondestructive methodology can be used to detect the damage in load zone with high accuracy.
本文用焦散的光学方法研究了均质材料中的应力集中。应力集中的研究对评价材料内部损伤具有重要的研究价值。本文介绍了一种光学实验方法——焦散法来研究透明材料弹性板的力学行为。在指数渐近展开的基础上,导出了用于表示外载荷奇异屈服的光-力学关系的焦散量法控制方程。实验结果表明,该方法是一种无损检测方法,可用于检测载荷区域的损伤,具有较高的精度。
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引用次数: 0
Statistic Methods for Assessments of Risks and Damages at Nuclear Power Plants 核电厂风险与损害评估的统计方法
Pub Date : 2017-02-20 DOI: 10.11648/J.NS.20170201.14
A. Valyaev, G. Aleksanyan, A. Valyaev, O. Arkhipkin
Many high development countries have not the natural hydrocarbon deposits. That is why NPP energy production is constantly and intensive increases. For example, in France. The corresponding treats under NPP exploitation also are increasing, that caused by different natural and manmade factors, including as attractive objects for possible directed terrorist attacks. Correct assessments of corresponding risks and damages are necessary for any NPP at all periods: its projecting, building and exploitation under its complex integrated emergency management. Here we try to analyze some possible methods of NPP risk assessments. Early we predicted the irradiation doses and corresponded risks for population under implementation of Russian Federal Program:” Development of Russian atomic energy industrial complex on 2007-2020 years at 10 homeland NPP, that operated in normal non disasters regimes during two last decades. But such data are absent for NPP, that have been or will be under non prognostic emergencies. It is connected with the following facts. The part or total of needed information may be obtained only after NPP disasters. Some NPP are located in the dangerous regions and exposed to intense negative natural responses (earthquakes, tsunami, etc.) and manmade ones, when NPP are located in some dangerous conflicts zones with high level of possible terrorism threats. Here the using of classic methods of expertise risk NPP assessments are not correct and often impossible at all. Some needed thematic data may be obtained from primary virtual computer tests of individual NPP with imitation of possible disasters. It allows to plan the actions for NPP operators and special services under serious NPP disasters or may be to prevent them at all. These thematic problems, connected with the following NPP: Fukusima, Seversk in Tomsk region, Armenian, the future NPP in Kazakhstan and nuclear terrorism are also under consideration in this article.
许多高度发展的国家没有天然的碳氢化合物矿床。这就是为什么NPP能源生产不断密集增长的原因。例如,在法国。由于不同的自然和人为因素,核电站开发所造成的相应待遇也在增加,包括作为可能的定向恐怖袭击的吸引对象。正确评估相应的风险和损害是任何核电站在其复杂的综合应急管理下的任何阶段:规划、建设和开发都是必要的。本文试图分析核电站风险评估的几种可行方法。早期,我们在俄罗斯联邦计划的实施下预测了辐射剂量和相应的人口风险:“2007-2020年俄罗斯原子能工业综合体在10个本土核电站的发展,在过去二十年中在正常的非灾害制度下运行。但是,对于已经或将处于非预测性紧急情况下的核电站,没有这样的数据。它与以下事实有关。需要的部分或全部信息只有在核电站发生灾难后才能获得。一些核电站位于危险地区,面临强烈的自然负面反应(地震、海啸等)和人为负面反应,而一些核电站位于可能存在高度恐怖主义威胁的危险冲突地区。在这里,使用传统的专业知识风险NPP评估方法是不正确的,而且往往根本不可能。通过模拟可能发生的灾害,对单个核电站进行初步虚拟计算机测试,可以获得一些所需的专题数据。它允许为核电站运营商和特殊服务计划在严重核电站灾难下的行动,或者可能完全阻止它们。这些专题问题与下列核电站有关:福岛核电站、托木斯克州的塞维尔斯克核电站、亚美尼亚核电站、哈萨克斯坦未来的核电站和核恐怖主义也在本文的审议范围之内。
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引用次数: 0
Estimation of Semi-Empirical Mass Formula Coefficients 半经验质量公式系数的估计
Pub Date : 2017-02-04 DOI: 10.11648/J.NS.20170201.13
M. Vahid, Mirhabibi Mohsen, Askari. Mohammad Bagher
Using linear least squares method and by data of atomic mass, the present study calculates the coefficients of volume, surface, Coulomb, and asymmetry terms in semi-empirical formula. Our findings show that the mass of neutron and hydrogen can be estimated via developing this example. The results of the present calculations are also compared with those of similar previous studies.
本文利用线性最小二乘法和原子质量数据,计算了半经验公式中体积系数、表面系数、库仑系数和不对称系数。我们的发现表明,中子和氢的质量可以通过发展这个例子来估计。本文的计算结果也与以往类似的研究结果进行了比较。
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引用次数: 5
Utilization of the Changes in Mechanical Properties as Dosimeter Due to Gamma Irradiation of High-Density Polyethylene (HDPE) 高密度聚乙烯(HDPE) γ辐照后力学性能变化的剂量计应用
Pub Date : 2017-02-03 DOI: 10.11648/J.NS.20170201.12
A. A. Elamin, E. Hassan, A. E. Mohamed–Osman, M. D. Abd-Alla, M. Elkanzi
Polymer materials are required to be used in nuclear power stations as insulation materials of electrical wire and cable. For the use of polymer materials in such regions, the electrical performance under different environments of radiation is different from that without radiation has been found through previous research. The aim of this paper is to use the change in mechanical properties with radiation dose to design polymer dosimeter. The experimental results show an improvement of Black PE mechanical properties such as distension, tensile strength and elongation at break as dose increases, indicating the predominance of cross-linking over oxidative degradation. The predominance of cross-linking results show linear relations between distension, tensile strength and elongation at break versus absorbed dose of gamma rays source. These relationships between these properties and dose level can be utilized as measuring tool (Dosimeter) for radiation exposure that incident on the HDPE samples.
核电站要求使用高分子材料作为电线电缆的绝缘材料。对于在这些区域使用的高分子材料,通过以往的研究发现,在不同的辐射环境下,其电性能与没有辐射的环境有所不同。本文的目的是利用聚合物的力学性能随辐射剂量的变化来设计聚合物剂量计。实验结果表明,随着剂量的增加,黑色聚乙烯的膨胀、抗拉强度和断裂伸长率等力学性能均有所改善,表明交联作用优于氧化降解作用。交联结果表明,膨胀、抗拉强度和断裂伸长率与γ射线源吸收剂量呈线性关系。这些特性与剂量水平之间的关系可作为HDPE样品辐射暴露的测量工具(剂量计)。
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引用次数: 0
Energy Levels Calculations of 24 Al and 25 Al Isotopes 24 Al和25 Al同位素的能级计算
Pub Date : 2017-01-21 DOI: 10.11648/j.ns.20170201.11
S. Mohammadi, Banafsheh Nemati Giv, N. S. Shakib
In this article, the energy levels of Aluminum isotopes 24Al and 25Al are calculated using OXBASH shell model code. The calculations were carried out in the SD model space with the W and CW Hamiltonian [1, 2] using the code OXBASH for windows PC [3]. This code which is based on one of the most applicable nuclear models, the shell model, deals with evaluating energy levels in nuclei. Using this code to calculate the energy levels of an isotope, produces several files that contains a set of data. The ground state energy of a nucleus and also the probable energies of excitation levels can be calculated by OXBASH. Programs will be reliable only when results meet experimental procedures. A compilation of SD-shell energy levels calculated with the USD Hamiltonian was published around 1988. A comparison had been made between our results and the available experimental data to test theoretical shell model description of nuclear structure in Aluminum isotopes. The calculated energy spectrum is in good agreement with the available experimental data.
在本文中,使用OXBASH外壳模型代码计算了铝同位素24Al和25Al的能级。使用windows PC的OXBASH代码[3],在SD模型空间中使用W和CW哈密顿量[1,2]进行计算。这个代码是基于一个最适用的核模型,壳层模型,处理在核的能量水平的评估。使用此代码计算同位素的能级,生成包含一组数据的几个文件。用OXBASH可以计算出原子核的基态能量和激发能级的可能能量。只有当结果符合实验程序时,程序才是可靠的。用USD哈密顿量计算的sd壳能级汇编在1988年左右发表。我们的结果与现有的实验数据进行了比较,验证了理论壳模型对铝同位素核结构的描述。计算得到的能谱与实验数据吻合较好。
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引用次数: 4
Using of 53 Mn and 10 Be Cosmogenic Isotopes for Geochronology and Monitoring of Cosmic Rays in Terrestrial Rocks 53mn和10be宇宙成因同位素在地球年代学和地球岩石宇宙射线监测中的应用
Pub Date : 2017-01-20 DOI: 10.11648/J.NS.20160101.14
V. Yants, S. G. Lebedev, N. Sobolevsky
The article discusses the methods of measuring the accumulation of radioactive isotopes 53Mn (with a half-life of T = 3.7 million years) and 10Be (T = 1.6 million years) in the iron-containing rocks. Knowledge of accumulation dynamics of these two isotopes would allow knowing both the time of shielding and flux of cosmic rays and also changes assessing the variations in the intensity of cosmic rays, the timing of glaciations, geological changes, and climatic processes in the world in retrospect of 0.1-10 million years. The main attendance paying to neutron - activation method of isotope analysis as low-cost both in money and time and more adapted for numerous sample processing. The advantages of isotope measurements in lunar craters are emphasized.
本文讨论了放射性同位素53Mn(半衰期T = 370万年)和10Be (T = 160万年)在含铁岩石中积累量的测定方法。了解这两种同位素的积累动力学,将使我们能够了解宇宙射线的屏蔽时间和通量,以及宇宙射线强度变化的评估、冰期的时间、地质变化和回顾10 - 1000万年世界气候过程的变化。中子活化同位素分析方法的主要优点是成本低、时间短,更适合于大量样品的处理。强调了月球环形山同位素测量的优点。
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引用次数: 0
Multipole Mixing Ratio, (E2/M1), and Electric Monopole Strength, (E0/E2), for γ-Transitions in 192 Pt γ-跃迁的多极混合比(E2/M1)和电单极强度(E0/E2
Pub Date : 2017-01-11 DOI: 10.11648/J.NS.20160101.13
S. Eid, S. Diab
The low-lying collective states in 192Pt are investigated in the frame work of the interacting boson approximation model IBA-2. The contour plot of the potential energy surfaces, V(β, γ), shows an O(6) character to the nucleus. B(M1), B(E2), δ(E2/M1) and X(E0/E2) were calculated and reasonable agreement has obtained to the available experimental data. Also, sharp upper bending is observed at I+=10.
在相互作用玻色子近似模型IBA-2的框架下研究了192Pt的低洼集体态。势能面V(β, γ)的等高线与原子核呈O(6)型。对B(M1)、B(E2)、δ(E2/M1)和X(E0/E2)进行了计算,与现有实验数据吻合较好。此外,在I+=10处观察到明显的上部弯曲。
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引用次数: 2
Effect of Aged Garlic Extract on Prodromal Phase After Acute Radiation Syndrome 陈年大蒜提取物对急性放射综合征前驱期的影响
Pub Date : 2016-12-29 DOI: 10.11648/J.NS.20160101.12
K. Bertrand, Chuisseu Djamen Dieudonné Pascal, D. Désiré, Samba Ngano Odette, M. Sone, O. Pierre, D. Faustin, Yomi Jean, Juimo Alain George, Nko’o Amvene Samuel, Tiedeu Alain Bertin, G. F. Joseph
Acute radiation syndrome results in 4 four phases among which the prodromal one characterized by malaise, diarrhea, vomiting, and anorexia. It last a few hours, but from irradiation to the 7th day after, some other signs (unspecified, mild, moderate or severe) are observed. Thus, the aim of this study was to assess if Aged garlic extract (AGE) could offer radioprotection by preventing signs of prodromal phase after acute radiation syndrome. Knowing, AGE is a natural product containing different compounds with antioxidant activity and possessing several physiological activities in experimental animals. Eight groups, five healthy male rats each were used (20 irradiated and 20 Sham Irradiated), among which some were receiving via gavages distilled water, the others AGE at different doses (25 mg/kg and 50 mg/kg) and the rest vitamin E + Alpha Lipoic Acid. The signs observed and evaluated (behavioral changes, salivation, state stool, water and food intake, weight loss, relative weight of organs, fatigue/weakness, temperature and bleeding) revealed a significant change in irradiated groups although AGE-pretreated rats prior and after irradiation revealed significant amelioration in radiation-induced disturbances. Therefore AGE can be considered having radioprotective effects against radiation-induced changes in prodromal phase signs.
急性放射综合征分为4个阶段,其中前驱期表现为不适、腹泻、呕吐和厌食。它持续几个小时,但从照射到第7天,观察到一些其他迹象(未指明,轻度,中度或重度)。因此,本研究的目的是评估老化大蒜提取物(AGE)是否可以通过预防急性辐射综合征后前驱期的迹象来提供辐射防护。已知AGE是一种天然产物,含有不同的抗氧化活性化合物,在实验动物中具有多种生理活性。选取8组健康雄性大鼠,每组5只(辐照组20只,假辐照组20只),其中部分大鼠灌胃蒸馏水,其余大鼠灌胃不同剂量的AGE (25 mg/kg和50 mg/kg),其余大鼠灌胃维生素E + α硫辛酸。观察和评估的体征(行为改变、流涎、大便状态、饮水和食物摄入、体重减轻、器官相对重量、疲劳/虚弱、体温和出血)显示辐照组发生了显著变化,尽管辐照前后经age预处理的大鼠显示辐照诱导的紊乱有显著改善。因此,AGE可被认为对辐射引起的前驱期体征变化具有辐射防护作用。
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引用次数: 0
期刊
Nuclear science abstracts
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