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Bulletin of the Lebedev Physics Institute最新文献

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Determination of Cosmic-Ray Arrival Directions Using the System of EAS Front Detectors at the Tien Shan High-Altitude Station 利用天山高空站的 EAS 前方探测器系统测定宇宙射线到达方向
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600244
A. L. Shepetov, V. V. Zhukov, V. A. Ryabov, N. O. Saduev, T. Kh. Sadykov
{"title":"Determination of Cosmic-Ray Arrival Directions Using the System of EAS Front Detectors at the Tien Shan High-Altitude Station","authors":"A. L. Shepetov,&nbsp;V. V. Zhukov,&nbsp;V. A. Ryabov,&nbsp;N. O. Saduev,&nbsp;T. Kh. Sadykov","doi":"10.3103/S1068335624600244","DOIUrl":"10.3103/S1068335624600244","url":null,"abstract":"<p>A system of detectors for the front of extensive air showers (EAS) was set up at the Tien Shan High-Altitude Station of the Lebedev Physical Institute (LPI), which has a high time resolution and is designed to determine the arrival directions of shower-generating cosmic-ray particles. Algorithms and software were developed for analyzing information coming from the station to obtain estimates of the azimuth and zenith angles for each registered shower. This information makes it possible to investigate a large-scale distribution of the arrival points of primary cosmic ray particles on the celestial sphere.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509031","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
Exclusive W Boson Decays 独有的 W 波色子衰变
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600360
A. G. Bagdatova, S. P. Baranov
{"title":"Exclusive W Boson Decays","authors":"A. G. Bagdatova,&nbsp;S. P. Baranov","doi":"10.3103/S1068335624600360","DOIUrl":"10.3103/S1068335624600360","url":null,"abstract":"<p>We discuss the suitability of few-body exclusive W boson decays for precise measurements of its mass and width. We show that the decay modes of this kind have extremely small relative widths, which excludes any possibility of their practical use.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515678","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
Detection of Somatic Cells in Milk Using Laser Light Scattering 利用激光光散射检测牛奶中的体细胞
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600566
A. V. Shkirin, S. N. Chirikov, N. V. Suyazov, M. E. Astashev, D. N. Ignatenko, S. V. Gudkov
{"title":"Detection of Somatic Cells in Milk Using Laser Light Scattering","authors":"A. V. Shkirin,&nbsp;S. N. Chirikov,&nbsp;N. V. Suyazov,&nbsp;M. E. Astashev,&nbsp;D. N. Ignatenko,&nbsp;S. V. Gudkov","doi":"10.3103/S1068335624600566","DOIUrl":"10.3103/S1068335624600566","url":null,"abstract":"<p>The angular intensity distribution of 650 nm laser radiation multiply scattered by bovine milk samples of various fat content, containing large-scale particles with a size of ~20 μm, is studied in cylindrical geometry. It is shown that the forward scattering intensity measured for milk with a fat content in the range of 0–6% decreases monotonically with increasing concentration of somatic cells in the range of 5 × 10<sup>4</sup>–10<sup>6</sup> cm<sup>‒3</sup>. However, the angular dependence of the side- and backscattering intensity, used to determine the fat content in milk, practically does not change when somatic cells are added. A prototype of a milk composition sensor is assembled, based on measuring the scattering indicatrix in the angular range of 18°–162° using an axisymmetric array of photodiodes in combination with a photodetecting CMOS matrix that measures the small-angle forward light scattering intensity (near 0°).</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515683","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
Study of Etching Features of Quartz Glass Irradiated with Xenon Ions 氙离子照射石英玻璃蚀刻特征研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600062
P. Yu. Apel, M. M. Chernyavsky, A. A. Gippius, G. V. Kalinina, N. S. Konovalova, N. M. Okateva, N. G. Polukhina, Zh. T. Sadykov, T. V. Shchedrina, N. I. Starkov, E. N. Starkova, I. I. Zasavitskii
{"title":"Study of Etching Features of Quartz Glass Irradiated with Xenon Ions","authors":"P. Yu. Apel,&nbsp;M. M. Chernyavsky,&nbsp;A. A. Gippius,&nbsp;G. V. Kalinina,&nbsp;N. S. Konovalova,&nbsp;N. M. Okateva,&nbsp;N. G. Polukhina,&nbsp;Zh. T. Sadykov,&nbsp;T. V. Shchedrina,&nbsp;N. I. Starkov,&nbsp;E. N. Starkova,&nbsp;I. I. Zasavitskii","doi":"10.3103/S1068335624600062","DOIUrl":"10.3103/S1068335624600062","url":null,"abstract":"<p>The first results of testing KU-2 optical quartz glass as a detector of accelerated heavy ions are presented. The results of etching the irradiated glasses in hydrofluoric acid indicate a possibility of their use for detecting superheavy nuclei and their decay products.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509029","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
On Possible Three-Graviton Vertices 关于可能的三引力子顶点
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335623600018
A. I. Nikishov
{"title":"On Possible Three-Graviton Vertices","authors":"A. I. Nikishov","doi":"10.3103/S1068335623600018","DOIUrl":"10.3103/S1068335623600018","url":null,"abstract":"<p>The author compares, in the Born approximation, the cross sections for graviton scattering on Newtonian center in three cases using 1) a three-graviton vertex of general relativity, 2) a vertex formed with a properly chosen gravitational energy-momentum tensor of a massless spin-2 field, and 3) a vertex formed with Landau and Lifshits pseudotensor energy momentum. In all three cases, the cross sections are different For scattering by angles θ of an order of unity. So, in principle, the experiment decides which three-graviton vertex is used by nature. The manifestation of nonlocalizability of field energy is noted.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509030","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
An Investigation of the Structural and Surface Topography of Aluminum Nitride Thin Films Deposited at Low Sputtering Power for Piezoelectric Applications 用于压电应用的低溅射功率氮化铝薄膜的结构和表面形貌研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335623601735
R. Jyothilakshmi, S. Sandeep, Yu. A. Mityagin, M. P. Telenkov, K. K. Nagaraja
{"title":"An Investigation of the Structural and Surface Topography of Aluminum Nitride Thin Films Deposited at Low Sputtering Power for Piezoelectric Applications","authors":"R. Jyothilakshmi,&nbsp;S. Sandeep,&nbsp;Yu. A. Mityagin,&nbsp;M. P. Telenkov,&nbsp;K. K. Nagaraja","doi":"10.3103/S1068335623601735","DOIUrl":"10.3103/S1068335623601735","url":null,"abstract":"<p>Aluminum nitride, a promising piezoelectric material grown below 400°C that is CMOS compatible, can be used for wide piezo applications. In this work, AlN is deposited using reactive magnetron sputtering at sputtering temperature of 300°C. Our focus was to grow <i>c</i> axis-oriented AlN thin-films at relatively low sputtering power for piezoelectric application. In this direction AlN thin films were deposited at a low sputtering power of 100 and 125 W and at a sputtering temperature of 300°С. X-ray diffraction and atomic force microscopy techniques were used to characterize the structural and surface topography of deposited thin films. Films grown at 125 W have a highly <i>c</i> axis-orientation (002) plane with an FWHM value of 0.38°. The roughness of the films was found to be 7.00 Å, and the near zero skewness represents a symmetric roughness distribution in the films. Pure films of this phase can be used for device applications in the future.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515680","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
Current‒Voltage Characteristics of Nonideal Josephson Junctions 非理想约瑟夫森结的电流-电压特性
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600050
A. N. Lykov, I. A. Lykov
{"title":"Current‒Voltage Characteristics of Nonideal Josephson Junctions","authors":"A. N. Lykov,&nbsp;I. A. Lykov","doi":"10.3103/S1068335624600050","DOIUrl":"10.3103/S1068335624600050","url":null,"abstract":"<p>We report calculations of current‒voltage characteristics (I‒V characteristics) of Josephson junctions using the resistive model. The I‒V characteristics are found to be stable to deviations of the dependence of the superconducting current on the phase difference (φ) of the order parameter at the junction boundaries from the simple sinusoidal one, characteristic of ideal Josephson junctions. It is shown that to analyze the processes occurring in Josephson junctions, it is important to measure the spectral composition of generation from these junctions.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515679","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
Reconstructing the Energy Spectrum of Cosmic Muons Measured with the Underground Detector of the Tien Shan High-Altitude Station 重建天山高空站地下探测器测量到的宇宙Μ介子能谱
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600281
M. Yu. Azarkin, M. R. Kirakosyan, O. V. Meshkov, V. A. Ryabov, A. L. Shepetov
{"title":"Reconstructing the Energy Spectrum of Cosmic Muons Measured with the Underground Detector of the Tien Shan High-Altitude Station","authors":"M. Yu. Azarkin,&nbsp;M. R. Kirakosyan,&nbsp;O. V. Meshkov,&nbsp;V. A. Ryabov,&nbsp;A. L. Shepetov","doi":"10.3103/S1068335624600281","DOIUrl":"10.3103/S1068335624600281","url":null,"abstract":"<p>This paper investigates the performance of the underground detector at the Tien Shan High-Altitude Station for the registration of cosmic muons produced in extensive air showers (EAS) using a simulation with GEANT4. The capability of reconstructing the energy spectrum of EAS muons based on the multiplicity of neutrons produced in interactions of the muons with the detector material and measured with neutron counters was analyzed. The best technique for the reconstruction of the muon energy spectrum is recommended according to the simulation results.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515681","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
Effect of Chlorine Introduction on Luminescent Properties of Novel Eu3+ Coordination Compounds with β-Diketones and Unsatured Carboxylic Acids 引入氯对带有 β-二酮类和未成熟羧酸的新型 Eu3+ 配位化合物发光特性的影响
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335624600232
A. V. Osadchenko, D. S. Daibagya, I. A. Zakharchuk, A. S. Selyukov, S. A. Ambrozevich, A. V. Ryzhov, N. V. Pevtsov, D. N. Pevtsov
{"title":"Effect of Chlorine Introduction on Luminescent Properties of Novel Eu3+ Coordination Compounds with β-Diketones and Unsatured Carboxylic Acids","authors":"A. V. Osadchenko,&nbsp;D. S. Daibagya,&nbsp;I. A. Zakharchuk,&nbsp;A. S. Selyukov,&nbsp;S. A. Ambrozevich,&nbsp;A. V. Ryzhov,&nbsp;N. V. Pevtsov,&nbsp;D. N. Pevtsov","doi":"10.3103/S1068335624600232","DOIUrl":"10.3103/S1068335624600232","url":null,"abstract":"<p>The paper examines the effect of introducing a chlorine atom into the coordination sphere of a rare earth ion for two novel Eu<sup>3+</sup> organometallic compounds. Using spectral and time-resolved measurements, we show that the introduction of a chlorine atom provides a way to achieve a significant increase (from 27 to 36%) in the luminescence efficiency of the studied compounds due to coordination symmetry breaking in the complexes.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515675","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
Statistical Properties of the Galactic Magnetic Field in the Dynamo Model with Fluctuations of the Alpha Effect and Turbulent Diffusion 带有阿尔法效应波动和湍流扩散的动力模型中银河系磁场的统计特性
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-06-25 DOI: 10.3103/S1068335623601875
D. A. Grachev, S. A. Elistratov, E. A. Mikhailov
{"title":"Statistical Properties of the Galactic Magnetic Field in the Dynamo Model with Fluctuations of the Alpha Effect and Turbulent Diffusion","authors":"D. A. Grachev,&nbsp;S. A. Elistratov,&nbsp;E. A. Mikhailov","doi":"10.3103/S1068335623601875","DOIUrl":"10.3103/S1068335623601875","url":null,"abstract":"<p>Magnetic fields in galaxies are usually originated through the action of a dynamo, which is based on the helicity of turbulent flows (alpha effect) and nonrigid rotation of a galaxy (differential rotation). They are opposed by dissipation, which tends to destroy the regular structures of the field. As a rule, dynamo equations contain averaged turbulence parameters. This approach presents difficulties in the case of galaxies with a highly inhomogeneous interstellar medium, associated, for example, with star formation. One way to solve the problem is to use random coefficients in the field equations. In this case, solutions require separate statistical analysis. This paper examines various statistical moments for the galactic magnetic field within the framework of a model assuming fluctuations of the alpha effect and turbulent diffusion.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141515676","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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