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New Version of the Experimental Setup for the Measurement of γ-QuantumEmission Cross Sections in Nuclear Reactions Induced by 14.1 MeV Neutrons 测量 14.1 MeV 中子诱导核反应中的γ-量子发射截面的新版实验装置
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430201
Y. Kopatch, D. Grozdanov, N. Fedorov, T. Tretyakova, P. I. Kharlamov, A. V. Andreev, G. Ahmadov, D. Berikov, S. Dabylova, Pr.K. Das, A. Kumar, G. V. Pampushik, I. Ruskov, I.A. Sirakov, V. Skoy, P. G. Filonchik, C. Hramco
{"title":"New Version of the Experimental Setup for the Measurement of γ-Quantum\u0000Emission Cross Sections in Nuclear Reactions Induced by 14.1 MeV Neutrons","authors":"Y. Kopatch, D. Grozdanov, N. Fedorov, T. Tretyakova, P. I. Kharlamov, A. V. Andreev, G. Ahmadov, D. Berikov, S. Dabylova, Pr.K. Das, A. Kumar, G. V. Pampushik, I. Ruskov, I.A. Sirakov, V. Skoy, P. G. Filonchik, C. Hramco","doi":"10.55959/msu0579-9392.79.2430201","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430201","url":null,"abstract":"Within the TANGRA project framework, a new experimental setup has been constructed for the measurement\u0000of reaction cross sections (n, X, γ) in the interaction of 14.1 MeV neutrons with nuclei. The facility has a special\u0000feature: the use of the tagged neutron method. This method enables efficient separation of background and\u0000useful events, as well as accurate tracking of neutron flux. Test measurements were performed on 28Si, 12C,\u0000and 16O nuclei, and the results showed satisfactory agreement with available experimental data. This paper\u0000presents the features of the setup design and the methodology for processing the obtained experimental data","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"27 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141663544","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
Dependence of Temperature Conditions of Planetary Atmospheres in the SolarSystem on the Length of the Annual Cycle 太阳系行星大气的温度条件与年周期长度的关系
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430802
I. I. Mokhov
{"title":"Dependence of Temperature Conditions of Planetary Atmospheres in the Solar\u0000System on the Length of the Annual Cycle","authors":"I. I. Mokhov","doi":"10.55959/msu0579-9392.79.2430802","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430802","url":null,"abstract":"The results of a comparative analysis of various characteristics of the temperature conditions of the planetary\u0000atmospheres in the Solar system and their dependence on orbital parameters, in particular on the length\u0000and angular frequency of the annual cycle, are presented. In particular, the root dependence on the angular\u0000frequency of the was noted. The dependence of the planetary equilibrium temperature in the cubic root form\u0000of the angular frequency of the annual cycle is associated withKepler’s third law. For Venus, Earth, Mars,\u0000Jupiter, Saturn, the root dependence of the scale height and tropospheric height on the length of the annual\u0000cycle is manifested, and the atmospheric features of the planets most distant from the Sun — Uranus and\u0000Neptune — are noted.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"80 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664497","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
Local Permeability of a Metasurface in the MHz and GHz Ranges 兆赫和千兆赫范围内元表面的局部渗透性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430502
A. V. Satskii, N. S. Perov
{"title":"Local Permeability of a Metasurface in the MHz and GHz Ranges","authors":"A. V. Satskii, N. S. Perov","doi":"10.55959/msu0579-9392.79.2430502","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430502","url":null,"abstract":"The work is dedicated to the study of the magnetic response of a metasurface made of split ring resonators\u0000(meta-atoms) in the MHz and GHz ranges. A new method for calculating the local permeability of a metasurface in the MHz frequency range is proposed, taking into account the finite sizes of the elements, and\u0000for the first time, a result of high degree of accuracy matching with experimental values has been obtained.\u0000In the GHz range, additional factors such as the retardation effect, non-uniform current distribution in the\u0000meta-atom, and the complexity of the nature of meta-atoms’ interaction compared to the MHz range are also\u0000considered, in particular, the emergence of electrical interaction between them.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"103 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666365","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
Existence and Stability of a Stationary Solution in a Two-DimensionalReaction-Diffusion System with Slow and Fast Components 具有慢速和快速成分的二维反作用-扩散系统中固定解的存在性和稳定性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-06 DOI: 10.55959/msu0579-9392.79.2430101
N. N. Nefedov, K. A. Kotsubinsky
{"title":"Existence and Stability of a Stationary Solution in a Two-Dimensional\u0000Reaction-Diffusion System with Slow and Fast Components","authors":"N. N. Nefedov, K. A. Kotsubinsky","doi":"10.55959/msu0579-9392.79.2430101","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430101","url":null,"abstract":"In the paper, the existence of a stable stationary solution in a reaction-diffusion system with slow and\u0000fast components in a two-dimensional spatial variable case is investigated. The theorem of the existence of a\u0000stationary solution with boundary layers in the case of Dirichlet boundary conditions is proven, its asymptotic\u0000approximation is constructed, and conditions for Lyapunov asymptotic stability of this solution are obtained.\u0000The research is based on the asymptotic method of differential inequalities, applied to a new class of problems.\u0000This result is practically important both for various applications described by similar systems and for the\u0000application of numerical stationing methods when solving elliptical boundary value problems.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":" 82","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141673035","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
Field emission from point diamond cathodes under continuous laser irradiation 点状金刚石阴极在连续激光照射下的场发射
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420501
V. Kleshch, I.R. Anderzhanov, R. Ismagilov, A. Obraztsov
{"title":"Field emission from point diamond cathodes under continuous laser irradiation","authors":"V. Kleshch, I.R. Anderzhanov, R. Ismagilov, A. Obraztsov","doi":"10.55959/msu0579-9392.79.2420501","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420501","url":null,"abstract":"The presented study investigates the impact of continuous laser irradiation in the visible range on the\u0000field emission properties of diamond needle-like micro-sized crystallites with a nanometer tip radius. The\u0000measurements were carried out in a vacuum diode configuration with a flat metal anode using DC voltage\u0000source. It was found that the field emission current increased under illumination, showing a direct correlation\u0000with the radiation power. At a maximum power density of about 400 W/cm2 the relative increase in current\u0000under the action of laser irradiation was 13%. The relative increase in current is determined by the parameters\u0000of the dark current-voltage characteristic and reaches its maximum value in the region corresponding to the\u0000minimum increase in dark current with voltage. It is shown that the most likely mechanism for the increase\u0000in current is a change in the electrical resistance of the diamond microneedle as a result of absorption of laser\u0000radiation in the presence of electron levels located in the band gap of the diamond associated with impurities\u0000or structural defects in the near surface layer of the diamond microneedle.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"22 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141018419","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 fine structure of pygmy and giant multipole resonances in nuclei 原子核中侏儒和巨型多极共振的精细结构
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420203
S. P. Kamerdzhieva, M. I. Shitov
{"title":"The fine structure of pygmy and giant multipole resonances in nuclei","authors":"S. P. Kamerdzhieva, M. I. Shitov","doi":"10.55959/msu0579-9392.79.2420203","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420203","url":null,"abstract":"In connection with the program of planned work on the megascience installation \"Intensive Reverse\u0000Compton\"(INOC) at the Scientific Center of Physics and Mathematics in Sarov, a brief overview of\u0000experimental and theoretical results in the field of pygmy- and giant resonance energies is presented.\u0000Considered: 1) pygmy-dipole resonance in 208Pb, for which the limit of experimental resolution has already\u0000been reached and separate 1\u0000− levels have been identified, 2) the most important physical results of experiments\u0000with a resolution of (50–200) keV both for gamma strenght functions, that determine the characteristics of\u0000nuclear reactions, and for analysis of non–statistical mechanisms of formation of widths of giant resonances\u0000(«doorway» states) in the framework of wavelet analysis. Some results in the field of excitation energies\u0000(1–5) MeV are also discussed.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"86 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019286","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
Calculation of the effective mass of electrons and holes of TlGaTe2 compound 计算 TlGaTe2 化合物电子和空穴的有效质量
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420502
A.P. Abdullaev, D.M. Gafarova
{"title":"Calculation of the effective mass of electrons and holes of TlGaTe2 compound","authors":"A.P. Abdullaev, D.M. Gafarova","doi":"10.55959/msu0579-9392.79.2420502","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420502","url":null,"abstract":"Based on the band structure of TlGaTe2 compound, the extrema of the valence and conduction bands were\u0000determined and the tensor of the components of the inverse effective mass of electrons and holes was calculated.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"49 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141017962","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
Photonuclear experiments: from the bremsstrahlung to the Compton backward scattering photons 光核实验：从轫致辐射到康普顿后向散射光子
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420201
V. V. Varlamov, A. Davydov
{"title":"Photonuclear experiments: from the bremsstrahlung to the Compton backward scattering photons","authors":"V. V. Varlamov, A. Davydov","doi":"10.55959/msu0579-9392.79.2420201","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420201","url":null,"abstract":"The features of the methods for obtaining the information on photonuclear reaction cross sections using\u0000the beams of bremsstrahlung and quasimonoenergetic photons from the annihilation in flight of relativistic\u0000positrons with which such the absolute majority of such kind data was obtained in the nucleus excitation\u0000energy up to ∼40 MeV are discussed. It was shown that significant disagreements between the results of\u0000such experiments in cross sections absolute values and shapes are due to both methods definite shortcomings\u0000which to a certain extent can be overcome by using the beams of the photons from the processes of Compton\u0000backward scattering.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"103 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141022169","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
X-ray lensless optics and ptychography X 射线无透镜光学和齿痕摄影
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420206
A. Busarov, P. Glagolev, N.L. Popov
{"title":"X-ray lensless optics and ptychography","authors":"A. Busarov, P. Glagolev, N.L. Popov","doi":"10.55959/msu0579-9392.79.2420206","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420206","url":null,"abstract":"One of the problems of modern optics is accurate and full description of the object and light fields. Thus,\u0000the optical properties of the materials should be characterized not only by their absorption, but also by the\u0000refraction, and the light fields near the object and detector — not only by the intensity, but also by the phase.\u0000The 1972 the work of Gershberg and Saxton was the first attempt to solve this problem in free space without\u0000optical elements, relying only on a quadratic detector and a computer simulation of the wave propagation.\u0000Today, such lensless imaging is used at different wavelengths, from terahertz to hard X-rays. The purpose of\u0000this work is to give a brief introduction to the theory of lensless imaging which can be applied to the X-ray\u0000region. The results of the corresponding experiments in invisible light using He-Ne laser and testing objects\u0000are also presented.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"18 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141020013","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 1-1 excited states of even-even nuclei 偶偶数原子核的 1-1 激发态研究
Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420202
R. V. Jolosa, E. A. Kolganovab
{"title":"Investigation of 1-1 excited states of even-even nuclei","authors":"R. V. Jolosa, E. A. Kolganovab","doi":"10.55959/msu0579-9392.79.2420202","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420202","url":null,"abstract":"General information on the structure and properties of the first excited 1\u0000− states of even-even nuclei is given.\u0000Poorly-studied characteristics of 1\u0000− states which are of interest for study within the framework of the research\u0000program at the Compton source of monochromatic gamma rays of ICPM INOC are discussed.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"14 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141021242","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
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