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Electron Transport in Photocathodes as a Response to a Laser Pulse Inducing the Photoelectric Effect 光电阴极中的电子传输对诱发光电效应的激光脉冲的响应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024601878
M. V. Vladimirov, S. M. Polozov, V. I. Rashchikov
{"title":"Electron Transport in Photocathodes as a Response to a Laser Pulse Inducing the Photoelectric Effect","authors":"M. V. Vladimirov,&nbsp;S. M. Polozov,&nbsp;V. I. Rashchikov","doi":"10.1134/S0021364024601878","DOIUrl":"10.1134/S0021364024601878","url":null,"abstract":"<p>An analytical model has been developed to describe the electron transport in semiconductor photocathodes exposed to microwave radiation from radiofrequency photoguns. The considered model, whose applicability framework is presented, makes it possible to obtain an analytical expression for the photocurrent profile, which potentially allows a more accurate simulation of the operation regime of radiofrequency photoguns for generating ultrashort (pico- and subpicosecond) electron bunches. The dependence of photocurrent fronts on the model parameters has been considered and discussed. The main directions for the development of the model have been outlined.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"428 - 433"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565790","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
Gravitational Field of a Self-Gravitating Continuous Medium and Dark Matter 自引力连续介质和暗物质的引力场
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602239
V. M. Zhuravlev
{"title":"Gravitational Field of a Self-Gravitating Continuous Medium and Dark Matter","authors":"V. M. Zhuravlev","doi":"10.1134/S0021364024602239","DOIUrl":"10.1134/S0021364024602239","url":null,"abstract":"<p>A method to describe the hidden mass effect or dark matter has been proposed on the basis of a new general solution of the Poisson equation for the gravitational field strength in a continuous self-gravitating medium. This solution is a consequence of the theory of space and matter alternative to the general relativity. Conditions have been derived to distinguish between the cases where the obtained solution describes the classical Newtonian gravitational field and the cases where this solution leads to the hidden mass effect. The representation obtained for the gravitational field strength has been analyzed within the model of the dynamic equilibrium of disk galaxies and the possibility of describing the observed properties of the hidden mass effect within this approach has been discussed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"388 - 395"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602239.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565787","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
Subterahertz Response of Planar Phospholipid Membranes in Inelastic Light Scattering 平面磷脂膜在非弹性光散射中的次赫兹响应
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602756
S. V. Adichtchev, E. A. Dobrynina, N. V. Surovtsev
{"title":"Subterahertz Response of Planar Phospholipid Membranes in Inelastic Light Scattering","authors":"S. V. Adichtchev,&nbsp;E. A. Dobrynina,&nbsp;N. V. Surovtsev","doi":"10.1134/S0021364024602756","DOIUrl":"10.1134/S0021364024602756","url":null,"abstract":"<p>Using a method of low frequency Raman scattering, hydrated planar samples of phospholipid bilayers are studied at room temperature. It has been demonstrated that a relaxation response, the spectral shape of which corresponds to a wide distribution of relaxation times in the picosecond range, is manifested in the subterahertz range. The spectral susceptibility of the relaxation response is described by a power function with an exponent of 0.25, is the same for gel and fluid phases of phospholipid bilayers, and does not depend on the degree of saturation of hydrocarbon tails of different phospholipids. The subterahertz relaxation response can be considered as an elementary relaxation event, which precedes slower relaxation processes such as lateral diffusion and changes in the thickness or curvature of a phospholipid bilayer.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"455 - 459"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565714","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
Magnon Supercurrent and the Phase Slippage in an Yttrium Iron Garnet Film 钇铁石榴石薄膜中的磁子超电流和相滑移
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024603117
Yu. M. Bunkov, V. I. Belotelov, P. M. Vetoshko, G. A. Knyazev, A. N. Kuzmichev, P. E. Petrov
{"title":"Magnon Supercurrent and the Phase Slippage in an Yttrium Iron Garnet Film","authors":"Yu. M. Bunkov,&nbsp;V. I. Belotelov,&nbsp;P. M. Vetoshko,&nbsp;G. A. Knyazev,&nbsp;A. N. Kuzmichev,&nbsp;P. E. Petrov","doi":"10.1134/S0021364024603117","DOIUrl":"10.1134/S0021364024603117","url":null,"abstract":"<p>Exactly forty years ago, the spin superfluidity and Bose–Einstein condensation of magnons in superfluid antiferromagnetic <sup>3</sup>He-B were discovered. In this work, the existence of spin superfluidity and phase slippage in an yttrium iron garnet film at room temperature is demonstrated using the optical Faraday effect. The s-patial distribution of the phase and amplitude of the spin precession under the conditions of magnon Bose‒Einstein condensation are studied by varying the pump phase difference between two strip lines exciting magnons.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"421 - 427"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603117.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565789","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
Measurement of the Cross Section for the Neutron-Induced Fission of 237Np Nuclei in the Energy Range of 0.3–500 MeV 测量能量范围为 0.3-500 兆电子伏的 237Np 核的中子诱发裂变截面
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602987
A. S. Vorobyev, A. M. Gagarski, O. A. Shcherbakov, L. A. Vaishnene, A. M. Tyagelskaya, N. M. Olkhovich, A. L. Barabanov
{"title":"Measurement of the Cross Section for the Neutron-Induced Fission of 237Np Nuclei in the Energy Range of 0.3–500 MeV","authors":"A. S. Vorobyev,&nbsp;A. M. Gagarski,&nbsp;O. A. Shcherbakov,&nbsp;L. A. Vaishnene,&nbsp;A. M. Tyagelskaya,&nbsp;N. M. Olkhovich,&nbsp;A. L. Barabanov","doi":"10.1134/S0021364024602987","DOIUrl":"10.1134/S0021364024602987","url":null,"abstract":"<p>The cross section for the neutron-induced fission of <sup>237</sup>Np nuclei in the neutron energy range of 0.3–500 MeV has been measured using the time-of-flight spectrometer of the GNEIS neutron complex at the Petersburg Nuclear Physics Institute, National Research Center Kurchatov Institute. The <sup>237</sup>Np(<i>n</i>, <i>f</i>) fission cross section has been measured with respect to the <sup>235</sup>U(<i>n</i>, <i>f</i>) fission cross section and fission fragments have been detected by low-pressure position-sensitive multiwire proportional counters. The data obtained have been compared to the previous experimental results and to estimates from various evaluated data libraries.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"373 - 380"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024602987.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565829","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 Flexoelectricity in a Multidomain Ferroelectric 多域铁电中的柔电性
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2024-11-01 DOI: 10.1134/S0021364024602847
A. S. Yurkov, P. V. Yudin
{"title":"On Flexoelectricity in a Multidomain Ferroelectric","authors":"A. S. Yurkov,&nbsp;P. V. Yudin","doi":"10.1134/S0021364024602847","DOIUrl":"10.1134/S0021364024602847","url":null,"abstract":"<p>Flexoelectricity in a macroscopically unpolarized multidomain ferroelectric is considered. It has been shown that the flexoelectric moduli are modified due to the piezoelectric effect in individual domains. The perturbation theory has been developed, where the effect appears in the third order. The estimate of the effect for lead titanate in the isotropic approximation has shown that corrections to the flexoelectric moduli <i>f</i><sub>1111</sub> and <i>f</i><sub>1122</sub> are comparable with their initial values and depend only on the initial value of <i>f</i><sub>1212</sub>. The correction to <i>f</i><sub>1212</sub> is small, which allows one to use the perturbation theory.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 6","pages":"411 - 415"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565713","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
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
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