Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.288521.1817
M. Abdel-Mageed, M. Abdel-Mageed
Through the application of the geometrical collective model, a number of nuclei have been subjected to an exhaustive investigation. A complete investigation has been conducted on the nuclei, which have a range of 2.60 ≤ R 4/2 ≤ 2.80. A comparative investigation was carried out in order to make a determination regarding the characteristics of the low-lying collective structure. A comparison was made between the energy levels that were measured for each individual nucleus and three distinct sets of theoretical calculations that were derived from the X(3), X(4), and X (5) models. For the purpose of this analysis, a comparison was made between the theoretical calculations and the experimentally measured energy levels. The nucleus that exhibits features that are consistent with the X(4) model is the target that is being sought after during the detection operation. For the entirety of this study, a certain set of criteria has been developed and put through a comprehensive analysis. There was a limited number of nuclei that were able to fulfill these requirements entirely.
{"title":"Searching for Nuclei Exhibiting the Critical Point Symmetry X(4)","authors":"M. Abdel-Mageed, M. Abdel-Mageed","doi":"10.21608/ajnsa.2024.288521.1817","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.288521.1817","url":null,"abstract":"Through the application of the geometrical collective model, a number of nuclei have been subjected to an exhaustive investigation. A complete investigation has been conducted on the nuclei, which have a range of 2.60 ≤ R 4/2 ≤ 2.80. A comparative investigation was carried out in order to make a determination regarding the characteristics of the low-lying collective structure. A comparison was made between the energy levels that were measured for each individual nucleus and three distinct sets of theoretical calculations that were derived from the X(3), X(4), and X (5) models. For the purpose of this analysis, a comparison was made between the theoretical calculations and the experimentally measured energy levels. The nucleus that exhibits features that are consistent with the X(4) model is the target that is being sought after during the detection operation. For the entirety of this study, a certain set of criteria has been developed and put through a comprehensive analysis. There was a limited number of nuclei that were able to fulfill these requirements entirely.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"9 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846531","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}
Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.287054.1814
R. El-Tayebany, Mootaz Ebied Shalaf
In this work, new designs for coincidence neutron detection systems were proposed and assessed with different neutron detectors ( 3 He, Ar and BF 3 ) and calculations. Each system consists of 42-neutron detectors arranged in two rings. The simulated systems include special nuclear material (SNM) with changing the neutron sources such as; AmLi, AmBe and 252 Cf. The aim of this work is the determination of the coincidence system efficiency and neutron distribution fluence for each proposed system in active mode with a changing of neutron detectors arrangement. The results of the proposed systems were studied and compared to the active-well neutron coincidence counter (AWCC) which is employed in uranium testing using the code Monte Carlo N-Particle eXtended (MCNPX) version 2.7.0. The systems that were suggested fell within the energy range of 0-0.025 KeV, which is the thermal neutron region. The results proved that we could advocate implementing any of the presented ideas to replace AWCC because no single model outperformed the others.
{"title":"Proposed New Different Coincidence Neutron Detection Systems using Monte Carlo Simulation.","authors":"R. El-Tayebany, Mootaz Ebied Shalaf","doi":"10.21608/ajnsa.2024.287054.1814","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.287054.1814","url":null,"abstract":"In this work, new designs for coincidence neutron detection systems were proposed and assessed with different neutron detectors ( 3 He, Ar and BF 3 ) and calculations. Each system consists of 42-neutron detectors arranged in two rings. The simulated systems include special nuclear material (SNM) with changing the neutron sources such as; AmLi, AmBe and 252 Cf. The aim of this work is the determination of the coincidence system efficiency and neutron distribution fluence for each proposed system in active mode with a changing of neutron detectors arrangement. The results of the proposed systems were studied and compared to the active-well neutron coincidence counter (AWCC) which is employed in uranium testing using the code Monte Carlo N-Particle eXtended (MCNPX) version 2.7.0. The systems that were suggested fell within the energy range of 0-0.025 KeV, which is the thermal neutron region. The results proved that we could advocate implementing any of the presented ideas to replace AWCC because no single model outperformed the others.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"338 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839224","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}
Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.294634.1824
Asmaa Hassan, somaya A mansour, Azza M. El-Bahkery
Cyclophosphamide and doxorubicin are often used as chemotherapy in Cancer treatment. However, these medications can cause harmful side effects, which may lead to disease progression. To address this issue, this study was conducted to evaluate the effect of combining cyclophosphamide and doxorubicin chemotherapy with low-dose gamma irradiation on the immune response and antitumor efficacy in a tumor mass animal model. Ehrlich ascites carcinoma cells (EAC) were implanted intramuscularly in the right thigh of female albino mice. The mice were then treated with doxorubicin (D) at a dose of 10 mg/kg body weight once a week for four weeks, and low-dose gamma radiation (0.25 Gy) (LDR) in the third and fourth weeks. The current study discovered that radiation might regulate angiogenesis and proliferation in solid tumors more effectively than cyclophosphamide and doxorubicin by themselves. considerable regulation of miR-21 and Let-7a fold change.Additionally, heat shock proteins 70 and 90 were decreased and the apoptosis marker caspase-3 was increased by the chemotherapy and radiation combination.These results suggest that low-dose gamma radiation combined with doxorubicin and/or cyclophosphamide might be a useful therapeutic regimen for the treatment of cancer.
{"title":"Low-dose gamma radiation controls let -7a and miR-21 in a solid tumor model.","authors":"Asmaa Hassan, somaya A mansour, Azza M. El-Bahkery","doi":"10.21608/ajnsa.2024.294634.1824","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.294634.1824","url":null,"abstract":"Cyclophosphamide and doxorubicin are often used as chemotherapy in Cancer treatment. However, these medications can cause harmful side effects, which may lead to disease progression. To address this issue, this study was conducted to evaluate the effect of combining cyclophosphamide and doxorubicin chemotherapy with low-dose gamma irradiation on the immune response and antitumor efficacy in a tumor mass animal model. Ehrlich ascites carcinoma cells (EAC) were implanted intramuscularly in the right thigh of female albino mice. The mice were then treated with doxorubicin (D) at a dose of 10 mg/kg body weight once a week for four weeks, and low-dose gamma radiation (0.25 Gy) (LDR) in the third and fourth weeks. The current study discovered that radiation might regulate angiogenesis and proliferation in solid tumors more effectively than cyclophosphamide and doxorubicin by themselves. considerable regulation of miR-21 and Let-7a fold change.Additionally, heat shock proteins 70 and 90 were decreased and the apoptosis marker caspase-3 was increased by the chemotherapy and radiation combination.These results suggest that low-dose gamma radiation combined with doxorubicin and/or cyclophosphamide might be a useful therapeutic regimen for the treatment of cancer.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853952","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}
Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.290367.1819
Moustafa Aziz
SMART Nuclear reactor, which is conceptually developed by KAERI (Korea Atomic Energy Research Institute), is a Small modular reactor of 330 Mwth. MCNPX computer code Package which is based on Monte Carlo method is used to model the reactor core and evaluate neutronic characteristics of the core. Reactor multiplication factor is evaluated with time. Fuel burnup and depletion of fissile 235 U and breeding of plutonium are calculated with fuel burnup along the life cycle of the reactor core. Radial and axial Power and flux mapping distributions are calculated along all fuel assemblies of the core. Delayed neutron fraction, prompt neutron life time as well as fuel, moderator and void temperature coefficient of reactivity are evaluated and analysed. The results indicated that average core burnup extends to 27 GWd/T after 3 operation years which corresponds to 235 U burnup ratio of 71 %. Power distribution is compared to previously published results and satisfactory agreements were found
{"title":"Analysis of Small Modular SMART Reactor Core Fuel Burn up using MCNPX code","authors":"Moustafa Aziz","doi":"10.21608/ajnsa.2024.290367.1819","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.290367.1819","url":null,"abstract":"SMART Nuclear reactor, which is conceptually developed by KAERI (Korea Atomic Energy Research Institute), is a Small modular reactor of 330 Mwth. MCNPX computer code Package which is based on Monte Carlo method is used to model the reactor core and evaluate neutronic characteristics of the core. Reactor multiplication factor is evaluated with time. Fuel burnup and depletion of fissile 235 U and breeding of plutonium are calculated with fuel burnup along the life cycle of the reactor core. Radial and axial Power and flux mapping distributions are calculated along all fuel assemblies of the core. Delayed neutron fraction, prompt neutron life time as well as fuel, moderator and void temperature coefficient of reactivity are evaluated and analysed. The results indicated that average core burnup extends to 27 GWd/T after 3 operation years which corresponds to 235 U burnup ratio of 71 %. Power distribution is compared to previously published results and satisfactory agreements were found","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"7 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849518","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}
Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.273671.1807
M. Mohery, A. Mindil, M. Farghaly, A.E. Elmeshneb
In the present work, the general characteristics of the interactions of 7 Li nuclei with nuclear emulsion at 3A GeV/c have been studied. The multiplicity of the charged secondary particles and the correlations among them are discussed. The average multiplicity, compound multiplicity, variation of the dispersion, and the variation of the average compound multiplicity with the different projectile and target mass numbers have been investigated. The outcomes demonstrate certain regularities in the interactions between 7 Li nuclei and emulsion nuclei, which were previously seen in tests involving lighter nuclei. The values of the average multiplicity of the secondary charged particles have been estimated, and the dependence of this average multiplicity on the mass number of the projectile has been analyzed. The impact parameter determines the average multiplicities of the secondary charged particles, which rise as the impact parameter decreases. The variation in average multiplicities of shower particles as a function of heavy ionizing particles has been discussed. The compound multiplicity has been shown to be a good kinematical parameter for studying the interaction between nuclei. The compound multiplicity's average value mostly rises as the projectile mass number does and with the target mass. The study of multiplicity correlations has shown that shower and grey particles are strongly correlated. The 7 Li interaction's experimental data have been methodically compared to other interactions at various energies; the new results are consistent with the corresponding results at almost the same energy. The results obtained in the current studies have been compared with those from hadron-nucleus collisions
在本研究中，我们研究了 7 个 Li 核在 3A GeV/c 下与核乳剂相互作用的一般特征。研究讨论了带电二级粒子的倍率以及它们之间的相关性。研究了平均倍率、复合倍率、离散度的变化以及平均复合倍率随不同射弹和目标质量数的变化。研究结果表明，7 Li 核与乳状核之间的相互作用具有某些规律性，这些规律性以前在涉及较轻核的试验中也曾出现过。对二次带电粒子的平均倍率值进行了估算，并分析了这一平均倍率与射弹质量数的关系。撞击参数决定了二次带电粒子的平均倍率，随着撞击参数的降低，平均倍率也随之升高。讨论了喷射粒子的平均倍率随重电离粒子的变化而变化的情况。研究表明，复合倍率是研究原子核之间相互作用的一个很好的运动学参数。复合倍率的平均值大多随着射弹质量数和目标质量的增加而增加。对倍率相关性的研究表明，喷射粒子和灰色粒子具有很强的相关性。7 Li 粒子相互作用的实验数据已被有条不紊地与不同能量下的其他相互作用进行了比较；新的结果与几乎相同能量下的相应结果是一致的。目前的研究结果已经与强子-核碰撞的结果进行了比较
{"title":"Some Characteristics of Relativistic Secondary Charged Particles Produced in 7Li Interaction with Nuclear Emulsion","authors":"M. Mohery, A. Mindil, M. Farghaly, A.E. Elmeshneb","doi":"10.21608/ajnsa.2024.273671.1807","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.273671.1807","url":null,"abstract":"In the present work, the general characteristics of the interactions of 7 Li nuclei with nuclear emulsion at 3A GeV/c have been studied. The multiplicity of the charged secondary particles and the correlations among them are discussed. The average multiplicity, compound multiplicity, variation of the dispersion, and the variation of the average compound multiplicity with the different projectile and target mass numbers have been investigated. The outcomes demonstrate certain regularities in the interactions between 7 Li nuclei and emulsion nuclei, which were previously seen in tests involving lighter nuclei. The values of the average multiplicity of the secondary charged particles have been estimated, and the dependence of this average multiplicity on the mass number of the projectile has been analyzed. The impact parameter determines the average multiplicities of the secondary charged particles, which rise as the impact parameter decreases. The variation in average multiplicities of shower particles as a function of heavy ionizing particles has been discussed. The compound multiplicity has been shown to be a good kinematical parameter for studying the interaction between nuclei. The compound multiplicity's average value mostly rises as the projectile mass number does and with the target mass. The study of multiplicity correlations has shown that shower and grey particles are strongly correlated. The 7 Li interaction's experimental data have been methodically compared to other interactions at various energies; the new results are consistent with the corresponding results at almost the same energy. The results obtained in the current studies have been compared with those from hadron-nucleus collisions","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"17 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844723","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}
Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.290999.1820
AlaaEldeen Shaban Elmeshneb
.
.
{"title":"The Nuclear EOS of PNM and sensitivity of Neutron Star Properties to modern NN Potentials","authors":"AlaaEldeen Shaban Elmeshneb","doi":"10.21608/ajnsa.2024.290999.1820","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.290999.1820","url":null,"abstract":".","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"3 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141843439","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}
Pub Date : 2024-07-01DOI: 10.21608/ajnsa.2024.281619.1809
Samah Dahy, R. M. Elshazly, T. Z. Amer, N. Gomaa, A. A. Bahgat
.
.
{"title":"Realizing the advantages of Replacing Lead with Tin in Bismuth-Lead Alloys for Improved Thermal and Nuclear Properties as Coolant","authors":"Samah Dahy, R. M. Elshazly, T. Z. Amer, N. Gomaa, A. A. Bahgat","doi":"10.21608/ajnsa.2024.281619.1809","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.281619.1809","url":null,"abstract":".","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"303 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839395","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}
Pub Date : 2024-04-01DOI: 10.21608/ajnsa.2024.251756.1796
mahmoud Taha, samia esmail
The nucleus-nucleus total reaction cross section at 30-1000 MeV/n is studied, using a modified Coulomb Glauber model, which includes combined effects due to phase variation, higher momentum transfer components, Pauli blocking, and a finite range. The total reaction cross sections of the reactions: 12C + 12C, 4He + 16O, 20Ne + 12C, 8Li + 9Be, 8 Li + 12 C and 8 Li + 27 Al using different densities of the harmonic oscillator single-particle wave function (SDHO) are calculated and compared with the available experimental data and previous calculations. Using a simulated search program, the phase variation 𝜸 𝑵𝑵 parameter is treated as a free parameter to fit the experimental data of the reaction cross section R . A good agreement with the experimental data is obtained. The relationship between the phase variation and finite range parameters as a function of incident energy is discussed. We investigated combined effects on p - 16 O reaction cross sections and compared with the available experimental data and previous calculations.
使用修正的库仑-格劳伯模型研究了 30-1000 MeV/n 的核-核总反应截面，该模型包括相变、较高动量传递成分、保利阻挡和有限范围的综合效应。反应的总反应截面为计算了使用不同密度的谐振子单粒子波函数（SDHO）的 12C + 12C、4He + 16O、20Ne + 12C、8Li + 9Be、8Li + 12 C 和 8Li + 27 Al 反应的总反应截面，并与现有实验数据和以前的计算结果进行了比较。利用模拟搜索程序，将相位变化𝜸 𝑵𝑵参数作为自由参数来拟合反应截面 R 的实验数据。结果与实验数据吻合良好。讨论了相位变化和有限范围参数与入射能量之间的关系。我们研究了对 p - 16 O 反应截面的综合影响，并与现有实验数据和以前的计算结果进行了比较。
{"title":"Extension of Phase Variation, Higher Momentum Transfer Components, and Pauli Blocking effects on Reaction Cross Sections to Lower and Medium Energies","authors":"mahmoud Taha, samia esmail","doi":"10.21608/ajnsa.2024.251756.1796","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.251756.1796","url":null,"abstract":"The nucleus-nucleus total reaction cross section at 30-1000 MeV/n is studied, using a modified Coulomb Glauber model, which includes combined effects due to phase variation, higher momentum transfer components, Pauli blocking, and a finite range. The total reaction cross sections of the reactions: 12C + 12C, 4He + 16O, 20Ne + 12C, 8Li + 9Be, 8 Li + 12 C and 8 Li + 27 Al using different densities of the harmonic oscillator single-particle wave function (SDHO) are calculated and compared with the available experimental data and previous calculations. Using a simulated search program, the phase variation 𝜸 𝑵𝑵 parameter is treated as a free parameter to fit the experimental data of the reaction cross section R . A good agreement with the experimental data is obtained. The relationship between the phase variation and finite range parameters as a function of incident energy is discussed. We investigated combined effects on p - 16 O reaction cross sections and compared with the available experimental data and previous calculations.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"1150 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140774546","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}
Pub Date : 2024-04-01DOI: 10.21608/ajnsa.2024.255055.1799
Abdelhameed Sharaf
In this manuscript, the experimental studies for two groups, 2N7000 and BS107, of N-channel MOSFET are conducted. Each group, which have two devices from the same type, is exposed to dosages of gamma-ray ionizing radiation. The main objective of this study is to discuss the dynamic performance of these types under low dose ionizing radiation for purpose of usage as a low dose radiation dosimeter. Novelty of this study arisen from that the dynamic parameters such as threshold voltage, rise and fall times, the transconductance and capacitance between different device terminals are investigated. Because of gamma-ray irradiation, the surface and interface charges are arisen into MOSFET region. The threshold voltage is dependent on the MOSFET parameters, as it depends reversely on the oxide capacitance. From the obtained results, the channel width and length play an important role for determining all the dynamic parameters. One can notice that the majority of capacitances values are decreased. Consequently, the threshold voltage is decreased with the increase of radiation dose. From outcomes, the different transconductance values have different comportment according to the channel width and length into these adjacent regions. Generally, it tends to degrade with increasing the gamma-ray irradiation dose. The rise time tends to decrease while fall time tends to increase semi-linearly with increasing dosage values. From digital processing point of view, small shift in the rise or fall time will affect the pulse decision and then the information processing. Finally, one can conclude that n-channel MOSFETs under study not only have a specified response to gamma-ray radiation but also, they give a deterministic performance over the range of dose in this study. Therefore, the n-channel MOSFET under study - for both type number and dose-is a candidate to be a low dose dosimeter for gamma-ray radiation. The obtained dynamic response will be very important for any recent space or ionizing radiation environment and applications
本手稿对两组 N 沟道 MOSFET（2N7000 和 BS107）进行了实验研究。每组都有两个相同类型的器件，它们都暴露在一定剂量的伽马射线电离辐射下。这项研究的主要目的是讨论这些类型在低剂量电离辐射下的动态性能，以便用作低剂量辐射剂量计。本研究的新颖之处在于对阈值电压、上升和下降时间、不同器件终端之间的跨导和电容等动态参数进行了研究。由于伽马射线的辐照，MOSFET 区域产生了表面和界面电荷。阈值电压取决于 MOSFET 参数，因为它与氧化物电容成反比。从得到的结果来看，沟道宽度和长度对决定所有动态参数起着重要作用。我们可以注意到，大多数电容值都在减小。因此，阈值电压随着辐射剂量的增加而降低。从结果来看，不同的跨导值在这些相邻区域会随着沟道宽度和长度的不同而有不同的变化。一般来说，随着伽马射线辐照剂量的增加，电感值呈下降趋势。随着剂量值的增加，上升时间趋于缩短，而下降时间则趋于半线性增加。从数字处理的角度来看，上升或下降时间的微小变化都会影响脉冲决策，进而影响信息处理。最后，我们可以得出结论，所研究的 n 沟道 MOSFET 不仅对伽马射线辐射有特定的响应，而且在本研究的剂量范围内具有确定的性能。因此，所研究的 n 沟道 MOSFET 在类型数和剂量方面都可以作为伽马射线辐射的低剂量剂量计。所获得的动态响应对于最近的空间或电离辐射环境和应用都非常重要。
{"title":"Dynamic Performance Evaluation of N-channel MOSFET under Gamma Irradiation","authors":"Abdelhameed Sharaf","doi":"10.21608/ajnsa.2024.255055.1799","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.255055.1799","url":null,"abstract":"In this manuscript, the experimental studies for two groups, 2N7000 and BS107, of N-channel MOSFET are conducted. Each group, which have two devices from the same type, is exposed to dosages of gamma-ray ionizing radiation. The main objective of this study is to discuss the dynamic performance of these types under low dose ionizing radiation for purpose of usage as a low dose radiation dosimeter. Novelty of this study arisen from that the dynamic parameters such as threshold voltage, rise and fall times, the transconductance and capacitance between different device terminals are investigated. Because of gamma-ray irradiation, the surface and interface charges are arisen into MOSFET region. The threshold voltage is dependent on the MOSFET parameters, as it depends reversely on the oxide capacitance. From the obtained results, the channel width and length play an important role for determining all the dynamic parameters. One can notice that the majority of capacitances values are decreased. Consequently, the threshold voltage is decreased with the increase of radiation dose. From outcomes, the different transconductance values have different comportment according to the channel width and length into these adjacent regions. Generally, it tends to degrade with increasing the gamma-ray irradiation dose. The rise time tends to decrease while fall time tends to increase semi-linearly with increasing dosage values. From digital processing point of view, small shift in the rise or fall time will affect the pulse decision and then the information processing. Finally, one can conclude that n-channel MOSFETs under study not only have a specified response to gamma-ray radiation but also, they give a deterministic performance over the range of dose in this study. Therefore, the n-channel MOSFET under study - for both type number and dose-is a candidate to be a low dose dosimeter for gamma-ray radiation. The obtained dynamic response will be very important for any recent space or ionizing radiation environment and applications","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"149 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140758414","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}
Pub Date : 2024-04-01DOI: 10.21608/ajnsa.2024.253603.1797
EL Sayed Waly, Mohamed Shehata, ahmed abdel reheem, Hoda Hanafy, Zakaria Ismaiel
Poly (vinyl chloride) (PVC), ethylene vinyl acetate (EVA), and PVC/EVA (50/50 wt%) samples were synthesized using casting technique. The as-prepared samples were irradiated with various fluencies of nitrogen ion beam, using a broad beam cold cathode ion source. The structural, optical and thermal properties of pristine and irradiated samples were investigated using FTIR, XRD, UV-VIS, and TGA analytical techniques. FTIR and XRD investigation showed several changes in the crystal structure, intensity and position of the characteristic peaks for the investigated samples. The optical band gap energies for both PVC and EVA samples is being to decrease with increasing ion beam fluence, whereas 50/50 wt% PVC/EA blend sample exhibits an increment behavior as a result of increasing ion beam fluence. The thermal stability of ion beam bombarded samples decreased for PVC and EVA samples than that for pristine samples, whereas a noticeable increase in the stability of the 50/50 wt% PVC/EVA blend samples. It is clear that thermal decomposition is affected by nitrogen ion beam fluencies owing to the extent of crosslinking and degradation processes. The results showed that nitrogen ion beam bombardment significantly affect the physico-chemical properties of PVC, EVA, and PVC/EVA samples.
采用浇铸技术合成了聚（氯乙烯）（PVC）、乙烯-醋酸乙烯（EVA）和 PVC/EVA （50/50 wt%）样品。使用宽束冷阴极离子源，用不同流量的氮离子束辐照制备的样品。使用傅立叶变换红外光谱（FTIR）、X 射线衍射光谱（XRD）、紫外可见光谱（UV-VIS）和热重分析技术研究了原始样品和辐照样品的结构、光学和热学特性。傅立叶变换红外光谱和 X 射线衍射研究表明，所研究样品的晶体结构、特征峰的强度和位置发生了一些变化。聚氯乙烯和 EVA 样品的光带隙能随着离子束束流的增加而减小，而 50/50 wt% 聚氯乙烯/EA 混合样品则随着离子束束流的增加而增大。与原始样品相比，离子束轰击过的 PVC 和 EVA 样品的热稳定性降低，而 50/50 wt% PVC/EVA 混合物样品的热稳定性则明显提高。很明显，由于交联和降解过程的程度，热分解会受到氮离子束流度的影响。结果表明，氮离子束轰击对 PVC、EVA 和 PVC/EVA 样品的物理化学特性有显著影响。
{"title":"Nitrogen ion beam radiation induced modification on physico-chemical properties of poly (vinyl chloride)/ethylene vinyl acetate blends","authors":"EL Sayed Waly, Mohamed Shehata, ahmed abdel reheem, Hoda Hanafy, Zakaria Ismaiel","doi":"10.21608/ajnsa.2024.253603.1797","DOIUrl":"https://doi.org/10.21608/ajnsa.2024.253603.1797","url":null,"abstract":"Poly (vinyl chloride) (PVC), ethylene vinyl acetate (EVA), and PVC/EVA (50/50 wt%) samples were synthesized using casting technique. The as-prepared samples were irradiated with various fluencies of nitrogen ion beam, using a broad beam cold cathode ion source. The structural, optical and thermal properties of pristine and irradiated samples were investigated using FTIR, XRD, UV-VIS, and TGA analytical techniques. FTIR and XRD investigation showed several changes in the crystal structure, intensity and position of the characteristic peaks for the investigated samples. The optical band gap energies for both PVC and EVA samples is being to decrease with increasing ion beam fluence, whereas 50/50 wt% PVC/EA blend sample exhibits an increment behavior as a result of increasing ion beam fluence. The thermal stability of ion beam bombarded samples decreased for PVC and EVA samples than that for pristine samples, whereas a noticeable increase in the stability of the 50/50 wt% PVC/EVA blend samples. It is clear that thermal decomposition is affected by nitrogen ion beam fluencies owing to the extent of crosslinking and degradation processes. The results showed that nitrogen ion beam bombardment significantly affect the physico-chemical properties of PVC, EVA, and PVC/EVA samples.","PeriodicalId":8110,"journal":{"name":"Arab Journal of Nuclear Sciences and Applications","volume":"100 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140776738","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}
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