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Estimation of the Composition of Ultra-High Energy Cosmic Rays Using the Muon Correlation Method Based on Yakutsk EAS Array Data 利用基于雅库茨克 EAS 阵列数据的μ介子相关法估算超高能宇宙射线的构成
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S002136402460188X
A. V. Glushkov, L. T. Ksenofontov, K. G. Lebedev, A. V. Saburov
{"title":"Estimation of the Composition of Ultra-High Energy Cosmic Rays Using the Muon Correlation Method Based on Yakutsk EAS Array Data","authors":"A. V. Glushkov,&nbsp;L. T. Ksenofontov,&nbsp;K. G. Lebedev,&nbsp;A. V. Saburov","doi":"10.1134/S002136402460188X","DOIUrl":"10.1134/S002136402460188X","url":null,"abstract":"<p>In this article a new method is proposed for estimating the mass composition of cosmic rays in individual events with energies above <span>(1.25 times {{10}^{{19}}})</span> eV. It is based on a joint analysis of experimental data and simulation results obtained using the QGSjet-II.04 model for muons with threshold energy <span>({{E}_{mu }} = 1.0 times cos theta )</span> GeV in air showers with zenith angles up to 60°. The data from ground-based and underground scintillation detectors of the Yakutsk EAS array were used. Separate groups of nuclei and other primary particles were found.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"396 - 403"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inelastic Collision Spectrum of Low-Energy Protons in the Field of Molecular Excitations of Water 水分子激发场中低能质子的非弹性碰撞光谱
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S002136402460246X
A. V. Bagulya, V. M. Grishin, I. N. Zavestovskaya, V. A. Ryabov
{"title":"Inelastic Collision Spectrum of Low-Energy Protons in the Field of Molecular Excitations of Water","authors":"A. V. Bagulya,&nbsp;V. M. Grishin,&nbsp;I. N. Zavestovskaya,&nbsp;V. A. Ryabov","doi":"10.1134/S002136402460246X","DOIUrl":"10.1134/S002136402460246X","url":null,"abstract":"<p>The spectrum of inelastic collisions of low-energy protons in the field of molecular excitations of water is obtained in terms of the complex refractive index of water determined from optical measurements in the infrared, visible, and ultraviolet regions. In the range of atomic frequencies (energies), the inelastic collision spectrum is determined from the integrated absorption cross section of X and gamma rays. The resulting spectra will extend the range of applicability of the photoionization model, which is of interest for improving dosimetry planning of the exposure of patients in proton (ion) therapy.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"450 - 454"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Super Long-Lived Neutral Excitations of the 1/3 Laughlin Liquid 1/3 劳克林液体的超长寿命中性激发
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024603129
A. V. Larionov, A. S. Zhuravlev, L. V. Kulik, A. A. Zagitova, I. V. Kukushkin
{"title":"Super Long-Lived Neutral Excitations of the 1/3 Laughlin Liquid","authors":"A. V. Larionov,&nbsp;A. S. Zhuravlev,&nbsp;L. V. Kulik,&nbsp;A. A. Zagitova,&nbsp;I. V. Kukushkin","doi":"10.1134/S0021364024603129","DOIUrl":"10.1134/S0021364024603129","url":null,"abstract":"<p>The long-term relaxation dynamics of neutral excitations with spin 1 in the Laughlin liquid at an electron filling factor of 1/3 has been studied. It has been found that there are two types of excitations with the same energies, the relaxation times of which to the ground state differ by at least two orders of magnitude. Assumptions are made about the nature of these excitations.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"434 - 439"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603129.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the Spatial Distribution of X-Pinch Plasma Radiation Using a New-Type Coded Aperture 利用新型编码光圈研究 X 射线等离子体辐射的空间分布
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024603014
E. A. Bolkhovitinov, A. A. Rupasov, A. A. Kologrivov, S. A. Pikuz, I. N. Tilikin, T. A. Shelkovenko, O. P. Ivanov, V. N. Potapov
{"title":"Study of the Spatial Distribution of X-Pinch Plasma Radiation Using a New-Type Coded Aperture","authors":"E. A. Bolkhovitinov,&nbsp;A. A. Rupasov,&nbsp;A. A. Kologrivov,&nbsp;S. A. Pikuz,&nbsp;I. N. Tilikin,&nbsp;T. A. Shelkovenko,&nbsp;O. P. Ivanov,&nbsp;V. N. Potapov","doi":"10.1134/S0021364024603014","DOIUrl":"10.1134/S0021364024603014","url":null,"abstract":"<p>To study the spatial distribution of the intensity of an X-ray source of electric discharge plasma, a new-type coded aperture, which is a structure of intersecting mutually perpendicular transparent and opaque strips with the widths selected using a random number generator, has been used. The radiation passed through the coded aperture has produced a complex pattern of the coded image, which has been recorded on a Fuji TR fluorescent imaging plate without a protective coating. A mathematical procedure based on the iterative method of solving an incorrectly posed problem given by the Fredholm integral equation of the first kind has been applied to reconstruct the spatial distribution of plasma radiation intensity from this pattern. It has been shown that the use of the coded aperture not only has increased significantly the light intensity of the recording system in comparison with a pinhole camera, but also has made it possible to obtain a spatial resolution of the discharge plasma no worse than the resolution of the pinhole camera. The applicability of the developed iterative method for both sources close to point ones and extended emitting objects has been demonstrated.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"445 - 449"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603014.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interference Photon Resonances and Nonlinearities in an Anharmonic Oscillator 非谐振荡器中的干涉光子共振和非线性现象
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602999
A. M. Basharov
{"title":"Interference Photon Resonances and Nonlinearities in an Anharmonic Oscillator","authors":"A. M. Basharov","doi":"10.1134/S0021364024602999","DOIUrl":"10.1134/S0021364024602999","url":null,"abstract":"<p>Resonant interactions of a coherent field with an anharmonic oscillator are classified based on the established analogy with multiphoton interactions of light with atoms. It is shown that interference interactions in which the absorption of a single coherent field quantum induces a multiphoton transition in the anharmonic oscillator are superpositions of resonances of the “cascade” and “lambda-V” types, and a general description of these resonances is given. For the third- and fourth-order nonlinearities, the general expressions are applicable to a resonant process with the absorption of a single photon and the double excitation of the oscillator. Resonant processes of the second harmonic generation and “rectification” of radiation are predicted and described; experimental investigation of these processes will provide information about anharmonicity parameters in the proposed model.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"404 - 410"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Observation of the Polarization of Λ Hyperons Produced in the Interaction of K– Mesons with Nuclei 观测在 K- 介子与原子核相互作用中产生的Λ超子的极化现象
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602811
V. V. Abramov, V. V. Moiseev, I. G. Alekseev, N. A. Bazhanov, N. S. Borisov, A. N. Vasiliev, Yu. M. Goncharenko, I. S. Gorodnov, A. B. Gridnev, N. K. Kalugin, N. G. Kozlenko, Yu. M. Melnik, A. P. Meshchanin, N. G. Minaev, D. A. Morozov, V. V. Mochalov, A. B. Neganov, V. M. Nesterov, K. D. Novikov, D. V. Novinskii, L. V. Nogach, M. B. Nurusheva, A. F. Prudkoglyad, S. V. Ryzhikov, V. L. Rykov, V. V. Ryltsov, A. V. Ryazantsev, E. I. Samigullin, D. N. Svirida, P. A. Semenov, A. V. Uzunyan, Yu. A. Usov, A. E. Yakutin
{"title":"Observation of the Polarization of Λ Hyperons Produced in the Interaction of K– Mesons with Nuclei","authors":"V. V. Abramov,&nbsp;V. V. Moiseev,&nbsp;I. G. Alekseev,&nbsp;N. A. Bazhanov,&nbsp;N. S. Borisov,&nbsp;A. N. Vasiliev,&nbsp;Yu. M. Goncharenko,&nbsp;I. S. Gorodnov,&nbsp;A. B. Gridnev,&nbsp;N. K. Kalugin,&nbsp;N. G. Kozlenko,&nbsp;Yu. M. Melnik,&nbsp;A. P. Meshchanin,&nbsp;N. G. Minaev,&nbsp;D. A. Morozov,&nbsp;V. V. Mochalov,&nbsp;A. B. Neganov,&nbsp;V. M. Nesterov,&nbsp;K. D. Novikov,&nbsp;D. V. Novinskii,&nbsp;L. V. Nogach,&nbsp;M. B. Nurusheva,&nbsp;A. F. Prudkoglyad,&nbsp;S. V. Ryzhikov,&nbsp;V. L. Rykov,&nbsp;V. V. Ryltsov,&nbsp;A. V. Ryazantsev,&nbsp;E. I. Samigullin,&nbsp;D. N. Svirida,&nbsp;P. A. Semenov,&nbsp;A. V. Uzunyan,&nbsp;Yu. A. Usov,&nbsp;A. E. Yakutin","doi":"10.1134/S0021364024602811","DOIUrl":"10.1134/S0021364024602811","url":null,"abstract":"<p>First results on the polarization of <span>(Lambda )</span> hyperons inclusively produced on 26.5-GeV/<i>c</i> <span>({{K}^{ - }})</span> and <span>({{pi }^{ - }})</span> beams are presented. The measurements were carried out using the SPASCHARM setup at the U-70 accelerator facility (Protvino, Russia) on nuclear targets in 2021 and 2022. The polarization of an <span>(Lambda )</span> hyperon on the <span>({{pi }^{ - }})</span> beam does not exceed several percent in most of the studied kinematic region. The data obtained on the <span>({{K}^{ - }})</span>-meson beam exhibit a significant positive polarization at large values of the Feynman variable <i>x</i><sub>F</sub> and transverse momentum <i>p</i><sub>T</sub> measured for the first time on nuclei.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"381 - 387"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602811.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Schwinger versus Unruh (Brief Review) Schwinger诉Unruh案（简要回顾）
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-10-29 DOI: 10.1134/S0021364024603324
G. E. Volovik
{"title":"Schwinger versus Unruh (Brief Review)","authors":"G. E. Volovik","doi":"10.1134/S0021364024603324","DOIUrl":"10.1134/S0021364024603324","url":null,"abstract":"<p>It is shown that the temperatures which characterise the Unruh effect, the Gibbons–Hawking radiation from the de Sitter cosmological horizon and the Hawking radiation from the black hole horizon acquire the extra factor 2 compared with their traditional values. The reason for that is the coherence of different processes. The combination of the coherent processes also allows us to make the connection between the Schwinger pair production and the Unruh effect.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 9","pages":"631 - 635"},"PeriodicalIF":1.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603324.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bound States and Scattering of Magnons on a Superconducting Vortex in Ferromagnet–Superconductor Heterostructures 铁磁体-超导体异质结构中超导涡旋上的束缚态和磁子散射
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-10-29 DOI: 10.1134/S0021364024603439
D. S. Katkov, S. S. Apostoloff, I. S. Burmistrov
{"title":"Bound States and Scattering of Magnons on a Superconducting Vortex in Ferromagnet–Superconductor Heterostructures","authors":"D. S. Katkov,&nbsp;S. S. Apostoloff,&nbsp;I. S. Burmistrov","doi":"10.1134/S0021364024603439","DOIUrl":"10.1134/S0021364024603439","url":null,"abstract":"<p>We study the magnon spectrum in a thin ferromagnet–superconductor heterostructure in the presence of a single superconducting vortex. We employ the Bogolubov–de Gennes Hamiltonian which describes the magnons in the presence of the stray magnetic field and the nonuniform magnetic texture induced by the vortex. We find that the vortex localizes magnon states approximately in the same way as a charge center produces electron bound states due to screened Coulomb interaction in the two-dimensional electron gas. The number of these localized states is substantially determined by the material parameters of the ferromagnetic film only. We solve the scattering problem for an incident plane spin wave and compute the total and transport cross sections. We demonstrate that the vortex-induced nonuniform magnetic texture in chiral ferromagnetic film produces a skew scattering of magnons. We explore the peculiarities of the quantum scattering problem that correspond to orbiting in the classical limit.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 9","pages":"655 - 663"},"PeriodicalIF":1.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603439.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Semiclassical Scattering by Edge Imperfections in Topological Insulators in a Magnetic Field 拓扑绝缘体在磁场中的边缘不完善半经典散射
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-10-29 DOI: 10.1134/S0021364024603154
A. S. Dotdaev, Ya. I. Rodionov, A. V. Rozhkov, P. D. Grigoriev
{"title":"Semiclassical Scattering by Edge Imperfections in Topological Insulators in a Magnetic Field","authors":"A. S. Dotdaev,&nbsp;Ya. I. Rodionov,&nbsp;A. V. Rozhkov,&nbsp;P. D. Grigoriev","doi":"10.1134/S0021364024603154","DOIUrl":"10.1134/S0021364024603154","url":null,"abstract":"<p>We study the scattering of edge states of 2D topological insulator in the uniform external magnetic field due to edge imperfections, common in realistic 2D topological insulator samples. The external magnetic field breaks time-reversal symmetry, opening the possibility of the scattering of otherwise topologically protected fermionic edge states. The scattering happens to be always an over-barrier event, irrespective of the shape of the edge deformation and magnitude of the magnetic field. We use the advanced Pokrovsky–Khalatnikov semiclassical approach, which allows us to obtain analytically both the main exponential and pre-exponential factors of the scattering amplitude for wide classes of analytic deformation profiles.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 9","pages":"675 - 686"},"PeriodicalIF":1.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603154.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Dusty Plasma Processes in the Physics of Comets 关于彗星物理学中的尘埃等离子体过程
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-10-15 DOI: 10.1134/S0021364024602653
S. I. Popel, A. P. Golub’, L. M. Zelenyi
{"title":"On Dusty Plasma Processes in the Physics of Comets","authors":"S. I. Popel,&nbsp;A. P. Golub’,&nbsp;L. M. Zelenyi","doi":"10.1134/S0021364024602653","DOIUrl":"10.1134/S0021364024602653","url":null,"abstract":"<p>Dusty plasma processes in the physics of comets are considered. The distribution functions of photoelectrons, the altitude dependences of the charges and sizes of dust particles, as well as electric fields are determined using a physicomathematical model for the self-consistent description of densities of photoelectrons and dust particles above the illuminated part of a comet nucleus. It has been shown that dusty plasma processes are significantly manifested when a comet is sufficiently far from the Sun. The dusty plasma near the comet nucleus with the parameters close to the parameters of the nucleus of Halley’s comet at distances to the Sun no less than ~2.5–3.5 AU is formed due to the electrostatic interactions similar to the formation of dusty plasmas near other atmosphereless bodies (e.g., the Moon, satellites of Mars, and asteroids). The dynamics of dust particles at closer distances from the Sun is determined by the gas flow from the comet nucleus.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 5","pages":"307 - 314"},"PeriodicalIF":1.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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