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Quantum design in the study of pycnonuclear reactions in compact stars and new quasibound states 致密恒星和新准束缚态中核反应研究中的量子设计
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-06-25 DOI: 10.15407/jnpae2023.02.093
K. A. Shaulskyi, S. Maydanyuk
Quantum effects in pycnonuclear reactions in compact stars at zero temperatures are studied with high precision. The reaction 16O + 16O was analyzed using the method of multiple internal reflections. The study of such reactions requires full consideration of quantum fluxes in the internal nuclear region. This reduces the rate and number of pycnonuclear reactions up to 1.8 times. This leads to the appearance of new states (which we call quasibound states) where the compound nuclear system is formed with maximal probability. As shown, the minimal energy of such a state is slightly higher than the energy of zero-mode oscillations in the lattice nodes in the pycnonuclear reaction, however, the probability of the formation of a compound system in a quasibound state is significantly greater than the corresponding probability in a state of zero-mode oscillations. It is reasonable to say that the frequency of reactions in quasi-bound states is more likely than in states of zero-mode oscillations. This can lead to significant changes in estimates of reaction rates in stars.
本文高精度地研究了致密恒星零温度下原子核反应中的量子效应。用多次内反射法分析了16O + 16O反应。这类反应的研究需要充分考虑核内区的量子通量。这使核反应的速率和次数减少了1.8倍。这导致了新状态(我们称之为准束缚态)的出现,在这种状态下,复合核系统以最大的概率形成。如图所示,这种状态的最小能量略高于核反应中晶格节点的零模振荡能量,但在准束缚状态下形成化合物体系的概率明显大于零模振荡状态下形成化合物体系的相应概率。可以合理地说,在准束缚态下的反应频率比在零模振荡状态下更有可能发生。这可能导致对恒星反应速率的估计发生重大变化。
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引用次数: 0
Correction of the indicators of the immune system with the help of bee pollen in conditions of the continuous combined effect of low-intensity ionizing radiation of natural and man-made origin 在自然和人为低强度电离辐射的持续联合作用下,借助蜂花粉对免疫系统各项指标的校正
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-06-25 DOI: 10.15407/jnpae2023.02.138
O. A. Raksha-Slіusareva, P. Kovalenko, O. A. Slіusarev, S.M. Kots, S. S. Boyeva
The peculiarities of the corrective effect of bee pollen on the indicators of the immune system (non-specific resistance and the immune system) of 56 conditionally healthy women living under constant exposure to low-intensity ionizing radiation of natural and man-made origin in the city of Kropyvnytskyi, Kirovohrad region, were investigated. To determine the probable radio-modification, bee pollen from the spring collection was used. The work used immunological methods of the 1st level, in-depth studies of cytomorphological changes of neutrophils and lymphocytes, as the main elements of the immune system, and also determined the hidden insufficiency of the immune system. The conducted studies showed the presence of a positive corrective effect of the course of bee pollen introduced into the diet on the indicators of non-specific resistance and the immune system in the case of the combined permanent effect of natural and man-made low-intensity radiation on the body of conditionally healthy women. The obtained corrective effect is manifested by the normalization or tendency to normalize the indicators of the cellular link of non-specific resistance to its restoration and reduction of the frequency and severity of the existing and hidden insufficiency of the content of lymphocytes, positive shifts in the number of intact and functioning neutrophils. The mechanisms of the corrective effect of bee pollen on the indicators of the immune system have been established. They include: a detoxification effect, a decrease in the level of inflammation, an increase in the number of functionally capable cells in the pool of neutrophils and lymphocytes.
对基罗沃拉德地区克罗皮夫尼茨基市56名持续暴露在低强度自然和人为电离辐射下的有条件健康妇女进行了蜂花粉对免疫系统指标(非特异性抗性和免疫系统)纠正作用的特殊性调查。为了确定可能的放射性修饰,使用了春季采集的蜂花粉。本工作采用一级免疫学方法,深入研究了作为免疫系统主要成分的中性粒细胞和淋巴细胞的细胞形态变化,也确定了免疫系统的隐性功能不足。所进行的研究表明,在自然和人为低强度辐射对有条件健康妇女的身体产生永久性影响的情况下,在饮食中加入蜂花粉的过程对非特异性抗性指标和免疫系统存在积极的纠正作用。所获得的纠正效果表现为非特异性耐药细胞环节指标的正常化或趋于正常化,其恢复和淋巴细胞既有和隐性不足的频率和严重程度的降低,完整和功能正常的中性粒细胞数量的积极变化。蜂花粉对免疫系统各项指标的纠正作用机制已经建立。它们包括:解毒作用,炎症水平的降低,中性粒细胞和淋巴细胞池中功能细胞数量的增加。
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引用次数: 1
Space-time picture and observables in heavy ion collisions at the Large Hadron Collider energies 在大型强子对撞机能量下重离子碰撞的时空图像和观测
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-06-25 DOI: 10.15407/jnpae2023.02.087
Y. Sinyukov, V. Shapoval, M. Adzhymambetov
In the present work, we combine and systemize the results of our recent research activity aiming to reveal the spatiotemporal structure of those extremely hot, dense, and rapidly expanding systems, which form in ultrarelativistic heavy ion collisions, as well as to reproduce in computer simulations the experimentally measured bulk observables. The latter include hadronic yields, particle number ratios, transverse momentum spectra, νn coefficients, and the femtoscopy scales, calculated for different collision energies within the integrated hydrokinetic model. We investigate how our simulation results depend on the model tuning, in particular, the utilized equation of state for quark-gluon matter and discuss the effect of the post-hydrodynamic stage of the system's evolution on the observables formation.
在目前的工作中,我们结合并系统化了我们最近的研究活动的结果,旨在揭示那些在超相对论重离子碰撞中形成的极热、密集和快速膨胀的系统的时空结构,并在计算机模拟中再现实验测量的大块观测值。后者包括强子产额、粒子数比、横向动量谱、νn系数和飞镜尺度,在综合流体动力学模型中计算不同碰撞能量。我们研究了我们的模拟结果如何依赖于模型调整,特别是利用夸克-胶子物质的状态方程,并讨论了系统演化的后流体动力阶段对可观测物形成的影响。
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引用次数: 0
The analysis of the radiation state in the sanitary protection zone and the observation zone of the nuclear research reactor of the Institute for Nuclear Research of NAS of Ukraine in 2021 乌克兰国家科学院核研究所2021年核研究堆卫生防护区和观测区辐射状况分析
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-06-25 DOI: 10.15407/jnpae2023.02.131
O. Gaidar, V. Tryshyn, O. V. Svarychevska, I. Pavlenko, O. V. Svyatun, I. Maliuk, S. V. Teletska
The results of the analysis of the radiation state of environmental objects in the sanitary protection zone (SPZ) and surveillance zone (SZ) of the research nuclear reactor (RNR) WWR-M of the Institute for Nuclear Research of the National Academy of Sciences of Ukraine (INR) for 2021 are analyzed and compared with the data for previous years (from 2016 to 2020). The levels of total beta activity of sedimentary dust and atmospheric precipitation and wastewater from the main reservoirs of INR, the concentration of beta-active aerosols in the surface layer of atmospheric air, as well as the content of 137Cs radionuclide in soil and vegetation samples, were studied. The research was conducted in the laboratory of the Center for Ecological Problems of Atomic Energy of INR. The obtained results show that in 2021 there was no excess of the values of controlled parameters compared to previous years. There was also no significant difference in the specific activity of the radionuclide 137Cs in soil and vegetation samples from SPZ and ZS. Studies conducted in the period from 2016 to 2021, allowed to accumulate significant factual material on the radiation situation in the sanitary protection zone and surveillance zone and to substantiate the conclusion about the absence of man-made radioactive contamination of the environment due to the operation of RNR WWR-M of INR of NAS of Ukraine.
对乌克兰国家科学院核研究所(INR)研究堆(RNR) WWR-M的卫生防护区(SPZ)和监视区(SZ)环境物体的辐射状态分析结果进行了分析,并与前几年(2016年至2020年)的数据进行了比较。研究了沉积尘埃、大气降水和INR主要水库废水中总β活性水平、大气表层β活性气溶胶浓度以及土壤和植被样品中137Cs放射性核素含量。这项研究是在INR原子能生态问题中心的实验室进行的。得到的结果表明,2021年的控制参数值与往年相比没有超出。在土壤和植被样品中,放射性核素137Cs的比活度也没有显著差异。在2016年至2021年期间进行的研究,可以积累有关卫生保护区和监测区辐射情况的重要事实材料,并证实乌克兰NAS INR的RNR WWR-M运行没有人为的环境放射性污染的结论。
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引用次数: 0
Quality assessment system for monolithic active micropixel detectors 单片有源微像素探测器质量评价系统
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-06-25 DOI: 10.15407/jnpae2023.02.154
M.V. Pugach, V. Dobishuk, V. Kyva, O.S. Kovalchuk, V. Pugatch, M. Teklishyn, S. Chernyshenko
A system for quality assessment of micropixel detectors is presented. The system includes a laser scanning microprobe and a setup for studying the response of micro detectors to minimum ionizing particles. The results of the validation of the developed system indicate its suitability for assessing the quality of the latest monolithic active pixel sensors (MAPS), promising elements of large-area tracking systems for future high-energy physics experiments. Comparison of MAPS with the double-sided microstrip detectors of the CBM experiment (FAIR, Darmstadt) indicates the feasibility of the upgrade of its Silicon Tracking System using MAPS.
提出了一种微像素探测器质量评估系统。该系统包括一个激光扫描微探针和一个用于研究微探测器对最小电离粒子响应的装置。该系统的验证结果表明,它适合于评估最新的单片有源像素传感器(MAPS)的质量,这是未来高能物理实验中大面积跟踪系统的有前途的元件。将MAPS与CBM实验(FAIR, Darmstadt)的双面微带探测器进行比较,表明了利用MAPS升级其硅跟踪系统的可行性。
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引用次数: 0
Effects of lithium insertion into vanadium pentoxide thin films. Continuum radiation study 锂插入对五氧化二钒薄膜的影响。连续辐射研究
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-03-25 DOI: 10.15407/jnpae2023.01.034
K. Bria, M. Ait El Fqih, R. Jourdani, L. Jadoual, A. Kaddouri
Optical emission of Lix(x=0.2,0.7,1.2)V2O5 has been studied during 5 keV Kr+ ions bombardment. Continuous luminescence was observed in a broad wavelength range between 280 and 340 nm. Generally, the emission intensity was influenced by the quantities of lithium giving rise to transient effects as well as an increase in the line intensity. The experimental results suggest that the continuum emission depends on the nature of surface interaction between lithium and vanadium pentoxide and is very probably related to its electronic structure.
研究了5 keV氪离子轰击Lix(x=0.2,0.7,1.2)V2O5的光发射。在280 ~ 340 nm的宽波长范围内观察到连续发光。一般来说,发射强度受到锂的数量的影响,从而产生瞬态效应以及线强度的增加。实验结果表明,连续发射取决于锂与五氧化二钒表面相互作用的性质,很可能与其电子结构有关。
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引用次数: 0
Alkyl derivative of p-terphenyl as an activator of the plastic scintillators with n/γ-discrimination ability 对三苯基的烷基衍生物作为具有n/γ辨别能力的塑料闪烁体的活化剂
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-03-25 DOI: 10.15407/jnpae2023.01.067
D.A. Yelisieiev, O.V. Yelisieieva, Yu.О. Нurkalenko, P. Zhmurin, V. Alekseev
In order to increase the solubility of p-terphenyl molecules, their structure was modified with tert-butyl groups. A derivative of p-terphenyl 2,4,4′-tris-tert-butyl-1,1′:4′,1′-terphenyl was obtained. The new activator was used to obtain polystyrene-based plastic scintillators. The optical and scintillation properties of the obtained plastic scintillators were studied and their ability to n/γ-discrimination was established.
为了提高对terphenyl分子的溶解度,对其结构进行了叔丁基修饰。得到对terphenyl 2,4,4 ' -三叔丁基-1,1 ':4 ',1 ' -terphenyl的衍生物。用该活化剂制备了聚苯乙烯基塑料闪烁体。研究了所制备的塑料闪烁体的光学和闪烁性能,并确定了其对n/γ的分辨能力。
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引用次数: 0
Description of photoabsorption using photon strength function with the excitation of two resonance states 用两个共振态激发下的光子强度函数描述光吸收
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-03-25 DOI: 10.15407/jnpae2023.01.017
O. Gorbachenko, V. Plujko, A. Kucher, V. Petrenko
The results of the use of photon strength function (PSF) of the model of two coupled damped oscillators (Two State Excitations, TSE) for the description of nuclear data for photoabsorption of electric dipole gamma-rays by atomic nuclei are presented. The response function widths dependent on gamma-ray energy were used instead of constant widths in the initial TSE model. It was demonstrated that such a phenomenological approach is a simple method for the description and prediction of the PSF with excitation of both low-energy (pigmy) dipole resonance (PDR) and high-energy giant dipole resonance (GDR). The best description of the experimental photoabsorption cross-sections is obtained at constant width in the PDR range and linear or quadratic energy-dependent width in the GDR range.
本文给出了用双耦合阻尼振子(双态激发)模型的光子强度函数(PSF)描述原子核光吸收电偶极子伽马射线的核数据的结果。在初始TSE模型中,我们使用了依赖于伽马射线能量的响应函数宽度,而不是常数宽度。结果表明,这种现象学方法是描述和预测低能(侏儒)偶极子共振(PDR)和高能巨偶极子共振(GDR)激发下PSF的一种简单方法。实验光吸收截面的最佳描述是在PDR范围内的恒定宽度和GDR范围内的线性或二次能量依赖宽度。
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引用次数: 0
Controlled heating of a cylindrical plasma using the features of an exceptional point 利用特殊点的特性控制圆柱形等离子体的加热
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-03-25 DOI: 10.15407/jnpae2023.01.051
A. Hlushchenko, O. Andrieieva, V. Tkachenko
The paper proposes a method of controlled heating of a cylindrical plasma using the features of the Exceptional point. It is shown that the coupled system of plasma and dielectric waveguides is capable of generating exceptional points where their dispersion curves cross. By controlling the connection (distance) between the waveguides, it is possible to control the distribution of the electromagnetic field, both in the plasma and in the dielectric waveguides around the exceptional point. It is also shown that in the presence of dissipative losses in the plasma, the degree of heating of the plasma waveguide can be controlled by tuning the distribution and intensity of the exciting electromagnetic field in the coupled waveguide system, which gives a potential advantage among other methods of plasma heating. The results obtained in the work can be considered as an example of a new method of controlled plasma heating, which can be used to overcome the existing problems of controlled thermonuclear fusion.
本文提出了一种利用异常点特性对圆柱形等离子体进行控制加热的方法。结果表明,等离子体和介质波导耦合系统能够在色散曲线交叉处产生异常点。通过控制波导之间的连接(距离),可以控制电磁场的分布,无论是在等离子体还是在异常点周围的介电波导中。在等离子体中存在耗散损耗的情况下,通过调节耦合波导系统中激发电磁场的分布和强度,可以控制等离子体波导的加热程度,这在其他等离子体加热方法中具有潜在的优势。所得结果可视为一种受控等离子体加热新方法的范例,可用于克服现有的受控热核聚变问题。
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引用次数: 0
Reaction 10В(15N,14С)11С at energy 81 MeV, spectroscopic factors and interaction of 14С + 11С nuclei 能量为81 MeV的反应10В(15N,14С)11С,光谱因子和14С + 11С核的相互作用
IF 0.3 Q4 Physics and Astronomy Pub Date : 2023-03-25 DOI: 10.15407/jnpae2023.01.022
A. Rudchik, A. A. Rudchik, V.V. Khejlo, K. Rusek, K. Kemper, E. Piasecki, A. Stolarz, A. Trzcińska, Val. M. Pirnak, O. Ponkratenko, E. I. Koshchy, O. E. Kutsyk, A. P. Ilyin, Y. Stepanenko, V. Uleshchenko, Yu. O. Shyrma
New experimental data of angular distribution cross-sections for the 10В(15N,14С)11С reaction at the energy Еlab(15N) = 81 MeV were obtained for the ground states of 14С, 11С nuclei and 2.00 MeV (1/2-), 4.31 MeV (5/2-), 4.31 MeV (3/2-) excited states of 11С nucleus. The experimental data were analyzed within the coupled-reaction-channels (CRC) method. In the CRC calculations, the 15N + 10В Woods - Saxon (WS) optical potential obtained from the CRC analysis of the experimental elastic and inelastic data of these nuclei was used and parameters of the 14С + 11С WS optical potential were deduced from the analysis of the 10В(15N,14С)11С reaction experimental data. Spectroscopic amplitudes of nucleons and cluster transfers were calculated within the translation-invariant shell model.
获得了14С、11С核基态和11С核激发态分别为2.00 MeV(1/2-)、4.31 MeV(5/2-)、4.31 MeV(3/2-)的10В(15N,14С)11С反应在Еlab(15N) = 81 MeV能量下的角分布截面的新实验数据。采用耦合反应通道(CRC)方法对实验数据进行了分析。在CRC计算中,采用对这些原子核的弹性和非弹性实验数据进行CRC分析得到的15N + 10В Woods - Saxon (WS)光势,并通过对10В(15N,14С)11С反应实验数据的分析推导出14С + 11С WS光势的参数。在平移不变壳模型中计算了核子和簇转移的光谱振幅。
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引用次数: 0
期刊
Nuclear Physics and Atomic Energy
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