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Eurasian Journal of Physics and Functional Materials最新文献

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Study of the effect of combined reinforcement and modification of epoxy resin with rubbers on the impact strength of carbon fiber-reinforced plastic 研究环氧树脂与橡胶的联合增强和改性对碳纤维增强塑料冲击强度的影响
Q4 Physics and Astronomy Pub Date : 2024-03-25 DOI: 10.32523/ejpfm.2024080103
M. Meiirbekov, M. B. Ismailov, A. K. Kenzhegulov, L. M. Mustafa, I.B. Tashmukhanbetova
The effect of modified epoxy resin with polyurethane, silicone, and butadiene rubber and combined reinforcement with fiberglass and Kevlar on the strength properties of carbon fiber-reinforced plastic was studied. It was found that when rubber is introduced into the composition of the epoxy resin, polyurethane, and combined reinforcement according to the carbon fiber/Kevlar scheme in a ratio of 10:10 leads to an increase in impact strength by 42% to 273 kJ/m 2 and compressive strength increases by 35% to 575 MPa.
研究了用聚氨酯、硅酮和丁二烯橡胶对环氧树脂进行改性,以及用玻璃纤维和凯夫拉纤维进行组合增强对碳纤维增强塑料强度性能的影响。研究发现,在环氧树脂、聚氨酯和碳纤维/凯夫拉尔复合增强材料的成分中加入橡胶(比例为 10:10)后,冲击强度提高了 42%,达到 273 kJ/m 2,抗压强度提高了 35%,达到 575 兆帕。
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引用次数: 0
Determination of phase boundaries and diffusion coefficients of copper in spinel CuCr2Se4 and delafossite CuCrSe2 by galvanostatic intermittent titration technique (GITT) 利用电致静电间歇滴定技术(GITT)确定尖晶石 CuCr2Se4 和脱辉石 CuCrSe2 中铜的相界和扩散系数
Q4 Physics and Astronomy Pub Date : 2024-03-25 DOI: 10.32523/ejpfm.2024080102
A. O. Onishenko, M. S. E.A. Suslov, Postnikov A.S, A. Shkvarin, A. Titov, Merentsov, M. N. Mikheev
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引用次数: 0
High Energy Approximation for Monte Carlo Event generator 蒙特卡洛事件发生器的高能近似法
Q4 Physics and Astronomy Pub Date : 2024-03-25 DOI: 10.32523/ejpfm.2024080101
A. N. Ismailova, Y. Parfenova, P. Sharov, D. M. Janseitov
Analysis of the nuclear physics experiment often requires Monte Carlo simulation of the detector setup. Such kind of simulations often requires a quite advanced model of nuclear interaction. In this work we describe application of Monte Carlo simulation in the nuclear physic experiment, and discuss on example of elastic scattering how to apply well known High Energy Approximation (or Glauber model) to Monte Carlo simulation of the experimental setup.
核物理实验分析通常需要对探测器设置进行蒙特卡罗模拟。这种模拟通常需要相当先进的核相互作用模型。在这项工作中,我们介绍了蒙特卡罗模拟在核物理实验中的应用,并以弹性散射为例讨论了如何将众所周知的高能近似(或格劳伯模型)应用于实验装置的蒙特卡罗模拟。
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引用次数: 0
Concentration polarization and ionic conductivity of nanocomposite thermoelectric materials K0.01Cu1.94S, K0.02Cu1.94S, K0.03Cu1.94S 纳米复合热电材料 K0.01Cu1.94S、K0.02Cu1.94S、K0.03Cu1.94S 的浓度极化和离子电导率
Q4 Physics and Astronomy Pub Date : 2024-03-25 DOI: 10.32523/ejpfm.2024080105
M. Kubenova, M. Balapanov, K. Kuterbekov, B. Akhmetgaliev, R. Ishembetov, R.F. Almukhametov, M. Zeleev, A. Kabyshev, K. Bekmyrza, R. Alina, R.E. Kondakirov, M.K. Kenzhebek
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引用次数: 0
Luminescence and creation of electron-hole trapping centers in alkali metal sulfates activated by Pb2+ impurity 碱金属硫酸盐在 Pb2+ 杂质激活下的发光和电子-空穴捕获中心的产生
Q4 Physics and Astronomy Pub Date : 2024-03-25 DOI: 10.32523/ejpfm.2024080104
T. Nurakhmetov, R. Shamieva, Z. Salikhodzha, N. I. Temirkulova, T. Alibay, B. Sadykova, B. Yussupbekova, A.A. Kabdulkak
The nature of the impurity emission and the process of creating intrinsic and impurity electron-hole trapping centers were studied by spectroscopic and thermal activation methods in Na 2 SO 4 - Pb and K 2 SO 4 - Pb phosphors. The combined radiative electronic state is formed from intrinsic SO 3 − 4 - SO − 4 and impurity Pb + - SO − 4 electron-hole trapping centers in UV-irradiated phosphors with a photon energy of 6.2 eV at 80 K. Emissions of 3.2 eV and 3.6 eV resulting from irradiation with photons with an energy of 6.2 eV are associated with intracenter transitions of 3p 1 - 1s 0 in Pb 2 + located in nonequivalent positions of the Na 2 SO 4 lattice.
通过光谱和热激活方法,研究了 Na 2 SO 4 - Pb 和 K 2 SO 4 - Pb 荧光粉中杂质发射的性质以及产生本征和杂质电子-空穴捕获中心的过程。在 80 K 光子能量为 6.2 eV 的紫外线照射下,荧光粉中的本征 SO 3 - 4 - SO - 4 和杂质 Pb + - SO - 4 电子空穴捕获中心形成了组合辐射电子态。6.2 eV 光子能量照射下产生的 3.2 eV 和 3.6 eV 发射与位于 Na 2 SO 4 晶格非等价位置的 Pb 2 + 中的 3p 1 - 1s 0 中心内跃迁有关。
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引用次数: 0
Computational scheme for breakup of 11Be on light targets 轻目标上11Be分解的计算方案
Q4 Physics and Astronomy Pub Date : 2023-09-25 DOI: 10.32523/ejpfm.2023070303
D. S. Valiolda, D. M. Janseitov, V.S. Melezhik
We investigate the Coulomb breakup of the 11 Be halo nuclei on a light (carbon) target within nonperturbative time-dependent approach including the low-lying resonance 5/2 + of 11 Be (E= 1.232 MeV). We had found considerable contribution of the low-lying resonances ( 5/2 + , 3/2 − and 3/2 + ) to the breakup cross section of 11 Be on a heavy ( 208 Pb) target at our previous calculations. The developed computational scheme is extended to study the breakup of 11 Be on a light target. This work is the initial step, where the convergence and accuracy of the computational scheme is tested.
我们用非微扰时间依赖方法研究了11个Be晕核在轻(碳)靶上的库仑分解,包括11个Be (E= 1.232 MeV)的5/2 +低空共振。在之前的计算中,我们已经发现低共振(5/2 +,3/2 -和3/2 +)对重靶(208 Pb)上11be的破裂截面有相当大的贡献。将所建立的计算格式推广到研究11be在轻目标上的分解。这项工作是第一步,其中计算方案的收敛性和准确性进行了测试。
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引用次数: 0
Compact and sustainable electronic module for silicon photodetectors 用于硅光电探测器的紧凑和可持续的电子模块
Q4 Physics and Astronomy Pub Date : 2023-09-25 DOI: 10.32523/ejpfm.2023070302
A. Sadigov, S. Nuruyev, R. Akbarov, D. B. Berikov, A. Madadzada, A. Mammadli, S. Lyubchyk, E. Yilmaz
This article presents the development of a cost-effective and efficient electronic module for silicon photodetectors (SiPM). The electronic module combines essential functionalities, such as a high voltage power supply, a preamplifier, and a signal comparator, into a compact circuit. A high voltage power supply with a range of 30 to 140 V provides a stable bias voltage with 0.01 V accuracy, while a preamplifier with 40 gain and 250 MHz bandwidth enables signal amplification necessary to extract weak signals. The comparator converts an analogue signal (higher than 8 mV) into TTL (transistor-transistor logic), which makes it easy to process and analyze with digital devices such as microcontrollers or make it possible to send signals over long distances by a cable. The module has been tested using an LYSO scintillator and a silicon photomultiplier (SiPM) called a micropixel avalanche photodiode (MAPD). It provides a more effective and efficient solution for reading out signals from SiPMs in a variety of applications, delivering reliable and accurate results in real-time.
本文介绍了一种经济高效的硅光电探测器(SiPM)电子模块的研制。电子模块结合了基本功能,如高压电源,前置放大器和信号比较器,成一个紧凑的电路。30至140 V的高压电源提供稳定的偏置电压,精度为0.01 V,而40增益和250 MHz带宽的前置放大器可以实现提取弱信号所需的信号放大。比较器将模拟信号(高于8mv)转换为TTL(晶体管-晶体管逻辑),这使得用微控制器等数字设备处理和分析变得容易,或者使通过电缆远距离发送信号成为可能。该模块已使用LYSO闪烁体和称为微像素雪崩光电二极管(MAPD)的硅光电倍增管(SiPM)进行了测试。它提供了一种更有效和高效的解决方案,用于读取各种应用中的sipm信号,实时提供可靠和准确的结果。
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引用次数: 0
Deformation-stimulated luminescence of a KBr crystal matrix KBr晶体基质的变形激发发光
Q4 Physics and Astronomy Pub Date : 2023-09-25 DOI: 10.32523/ejpfm.2023070306
K. Shunkeyev, A. Tilep, Sh. Sagimbayeva, Zh. Ubaev
Radiative relaxations of electronic excitations - self-trapped excitons (STE) in regular lattice sites (intrinsic luminescence) and exciton-like formations (ELF) in the field of homologous cations (exciton-like luminescence). It has been found that the maximum effect of luminescence enhancement occurs upon uniaxial deformation along the <110> crystallographic direction (compared to <100>), which coincides with the direction of the self-trapped anion exciton (<110>) in the KBr crystal matrix. The exciton mechanism was estimated from the increase in the intensity of the intrinsic s(4, 42eV) - and p(2, 3eV) - luminescences of STE, and the enhancement of luminescence intensity of near-single Na + (2.85 eV), pair ions Na + , Na + (3.1 eV) and Na + Pb ++ (3.4 eV)- centers - recombination mechanism of radiative relaxation of electronic excitations.
电子激发的辐射弛豫-规则点阵中的自捕获激子(STE)(本征发光)和同源阳离子场中的类激子形成(ELF)(类激子发光)。研究发现,发光增强的最大效果出现在沿<110>晶体学方向(与<100>相比),这与KBr晶体基质中自俘获阴离子激子(<110>)的方向一致。从STE本征s(4,42 eV)-和p(2,3 eV)-发光强度的增加,以及近单Na + (2.85 eV)、Na +、Na + (3.1 eV)和Na + Pb ++ (3.4 eV)对离子发光强度的增强-电子激发辐射松弛的复合机制推测了激子机制。
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引用次数: 0
Selection of an internal standard to determine mass concentration of uranium in human urine by inductively coupled plasma mass-spectrometry 电感耦合等离子体质谱法测定人尿中铀质量浓度的内标选择
Q4 Physics and Astronomy Pub Date : 2023-09-25 DOI: 10.32523/ejpfm.2023070305
V. V. Kolbin, M. T. Dyuisembaeva, N. Zh. Mukhamediyarov, A. Zh. Tashekova, G. M. Yesilkanov, Ye. Z. Shakenov, A.Ye. Temirzhanova
The paper presents experimental studies on the choice of an internal standard in order to correction the matrix effect that occurs when determining uranium in human urine by inductively coupled plasma mass spectrometry. Monoelemental standard solutions of Sc-45, Rh-103, In-115, Ir-193, Th-232 were used as internal standards. The levels of the decrease in the sensitivity of analytical signals of internal standards and uranium spikes under the influence of the matrix effect were determined. The ratio of the measured concentration of internal standards in the background solution of 5% nitric acid and in the matrix of the urine simulator was found compared to uranium. Based on this, empirical coefficients were calculated that characterize the difference in the matrix influence on analytical signals of the internal standard and uranium signals. Adjustment applied was verified according to the internal standard using calculated empirical coefficients and measured values of analytical signals of the internal standard in samples and in the background solution. Iridium was identified as the most suitable of the elements listed as an internal standard according to various criteria. Based on experimental results, a procedure was developed for measuring uranium in urine using iridium as an internal standard.
本文介绍了采用电感耦合等离子体质谱法测定人尿中铀时,为校正基体效应而选择内标的实验研究。单元素标准溶液Sc-45, Rh-103, In-115, Ir-193, Th-232作为内标。测定了基质效应对内标分析信号和铀尖峰分析信号灵敏度下降的影响程度。在5%硝酸本底溶液和尿液模拟器基质中测定的内标浓度与铀的比值。在此基础上,计算了表征内标分析信号与铀信号的矩阵影响差异的经验系数。根据内标计算的经验系数和样品及本底溶液中内标分析信号的实测值,对所施加的调整进行验证。根据各种标准,铱被确定为最合适的内标元素。根据实验结果,开发了一种以铱为内标测量尿中铀的方法。
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引用次数: 0
The quality assessment of the MPD new inner tracker based on thin silicon pixel sensors with large area 基于大面积薄硅像素传感器的MPD新型内跟踪器的质量评价
Q4 Physics and Astronomy Pub Date : 2023-09-25 DOI: 10.32523/ejpfm.2023070301
V. I. Zherebchevsky, V. P. Kondratiev, N. A. Maltsev, Yu. A. Murin, V. V. Petrov
Today one of the important problems of elementary particle and high energy physics is the study of strongly interacting matter under extreme conditions. In experiments with relativistic heavy ion reactions, a new phase of matter: quark-gluon plasma is being studied. It make possible to shed the light on the first seconds of the Universe existence, as well as to quantitatively describe the processes of neutron star merger. Ultra-high density nuclear matter states could be investigated in the collisions of heavy nuclei at energy range 4 - 11 GeV by studying of the particles yields which contained charm quarks in the Multi Purpose Detector experiment at the NICA collider. In this work, the concept of tracking detector was proposed together with the corresponding modeling of such detector whose inner layers consist of new generation large area thin (40 μm ) monolithic active pixel sensors, and whose outer layers are built of pixel sensors (50 μm ) currently used in high-energy physics experiments. The identification capability of a vertex detector that uses 40 μm and 50 μm thick pixel sensors was obtained. These data give the possibility to reconstruct the decays of D+ mesons produced in gold-gold collisions in the NICA complex.
今天,基本粒子和高能物理学的一个重要问题是研究极端条件下强相互作用物质。在相对论性重离子反应的实验中,一种新的物质相:夸克-胶子等离子体正在被研究。它使揭示宇宙存在的最初几秒钟成为可能,并定量描述中子星合并的过程。通过NICA对撞机多用途探测器实验中包含粲夸克的粒子产率的研究,可以研究4 ~ 11gev重核碰撞中的超高密度核物质态。本文提出了跟踪探测器的概念,并对其进行了相应的建模,该探测器的内层由新一代大面积薄(40 μm)单片有源像素传感器组成,外层由目前高能物理实验中使用的50 μm像素传感器组成。得到了采用40 μm和50 μm厚像素传感器的顶点检测器的识别能力。这些数据提供了重建NICA复合体中金-金碰撞产生的D+介子衰变的可能性。
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引用次数: 0
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Eurasian Journal of Physics and Functional Materials
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