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Bulletin of the Lebedev Physics Institute最新文献

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Adaptation of the Pavicom-1 Automated Scanning Facility for Processing Nuclear Emulsions of the SND@LHC Experiment 改造 Pavicom-1 自动扫描设备，用于处理 SND@LHC 实验的核乳剂
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624601158
M. M. Chernyavsky, N. S. Konovalova, N. M. Okateva, N. G. Polukhina, Zh. T. Sadykov, T. V. Shchedrina, N. I. Starkov, E. N. Starkova
{"title":"Adaptation of the Pavicom-1 Automated Scanning Facility for Processing Nuclear Emulsions of the SND@LHC Experiment","authors":"M. M. Chernyavsky,&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","doi":"10.3103/S1068335624601158","DOIUrl":"10.3103/S1068335624601158","url":null,"abstract":"<p>The PAVICOM-1 scanning device is one of the automated microscopes of the PAVICOM optical measuring complex designed at Lebedev Physical Institute of the Russian Academy of Sciences for high-tech processing of experimental data obtained using solid-state track detectors in the field of nuclear physics, cosmic ray physics, and high-energy physics. A regular upgrade of the PAVICOM-1 device is presented, which makes it possible to scan photographic nuclear emulsions of the SND@LHC accelerator experiment.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"339 - 344"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573669","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
Key Notes on Fixed Point Programming in Particle Radiotherapy 粒子放疗中的定点编程要点说明
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624601043
A. E. Chernukha, V. O. Saburov, A. I. Adarova, N. A Skotnikova, O. Yu. Golovanova, A. I. Shestopalov, A. E. Shemyakov, S. N. Koryakin, I. A. Gulidov, S. A. Ivanov, I. N. Zavestovskaya, A. N. Solovev
{"title":"Key Notes on Fixed Point Programming in Particle Radiotherapy","authors":"A. E. Chernukha,&nbsp;V. O. Saburov,&nbsp;A. I. Adarova,&nbsp;N. A Skotnikova,&nbsp;O. Yu. Golovanova,&nbsp;A. I. Shestopalov,&nbsp;A. E. Shemyakov,&nbsp;S. N. Koryakin,&nbsp;I. A. Gulidov,&nbsp;S. A. Ivanov,&nbsp;I. N. Zavestovskaya,&nbsp;A. N. Solovev","doi":"10.3103/S1068335624601043","DOIUrl":"10.3103/S1068335624601043","url":null,"abstract":"<p>The paper examines the violations of monotonicity and semiconvergence of the inverse optimization problem to equilibrium iterative solutions under conditions of physical density discontinuities in therapy planning techniques. Additionally, it addresses aspects of quasi-Newton iterations of the obtained solution in both voxel representation and continuous approximation. Examples include radiation treatment plans for patients treated with proton beam at the Prometheus therapeutic facility at the A. Tsyb Medical Radiological Research Center, Obninsk, Kaluga oblast, Russia. The presented aspects of the theory and its applications form the basis of the dose-anatomical planning program.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"345 - 352"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573668","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
Method of Frequency Mapping of a Virus Using the Example of Tobacco Mosaic 以烟草花叶病毒为例绘制病毒频率图的方法
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624600827
A. F. Bunkin, M. A Davydov, A. N. Fedorov
{"title":"Method of Frequency Mapping of a Virus Using the Example of Tobacco Mosaic","authors":"A. F. Bunkin,&nbsp;M. A Davydov,&nbsp;A. N. Fedorov","doi":"10.3103/S1068335624600827","DOIUrl":"10.3103/S1068335624600827","url":null,"abstract":"<p>A set of vibrational eigenmodes of the tobacco mosaic virus is recorded in the frequency range of 4‒50 GHz in experiments on stimulated inelastic scattering of laser light in a liquid suspension of viral nanoparticles. The data obtained in this way is proposed to be used for rapid optical identification of viruses.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"315 - 318"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573675","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
Laser-Ablation Synthesis of Colloidal ZrN Nanoparticles in Different Liquids 在不同液体中激光烧蚀合成 ZrN 纳米胶体粒子
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624601092
M. S. Savinov, G. V. Tikhonowski, A. I. Pastukhov, A. A. Fronya, I. N. Zavestovskaya, S. M. Klimentov, A. V. Kabashin, A. A. Popov
{"title":"Laser-Ablation Synthesis of Colloidal ZrN Nanoparticles in Different Liquids","authors":"M. S. Savinov,&nbsp;G. V. Tikhonowski,&nbsp;A. I. Pastukhov,&nbsp;A. A. Fronya,&nbsp;I. N. Zavestovskaya,&nbsp;S. M. Klimentov,&nbsp;A. V. Kabashin,&nbsp;A. A. Popov","doi":"10.3103/S1068335624601092","DOIUrl":"10.3103/S1068335624601092","url":null,"abstract":"<p>The paper presents a study of the effect of the liquid medium type on the properties of zirconium nitride (ZrN) nanoparticles (NPs) synthesized by pulsed laser ablation in liquids (PLAL). A comparative analysis of the properties of NPs synthesized in six different liquids (acetonitrile, acetone, ethanol, isopropyl alcohol, dimethylformamide, and deionized water) demonstrates that NPs obtained in acetonitrile and acetone are the most promising for biomedical applications. Synthesized ZrN NPs can be used as sensitizers of innovative noninvasive methods of cancer therapy and contrast agents in diagnostics.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"365 - 370"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573672","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
Computational Modeling of Magnetron Sputtering for Thin-Film Materials: Optimizing Deposition and Analyzing Morphology 薄膜材料磁控溅射的计算建模：优化沉积和分析形态
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624600694
Bouazza Abdelkader
{"title":"Computational Modeling of Magnetron Sputtering for Thin-Film Materials: Optimizing Deposition and Analyzing Morphology","authors":"Bouazza Abdelkader","doi":"10.3103/S1068335624600694","DOIUrl":"10.3103/S1068335624600694","url":null,"abstract":"<p>Thin-film layers are commonly produced via magnetron sputtering, with experimental exploration typically aimed at determining optimal deposition conditions and understanding the relationship between film quality and deposition parameters. Despite the benefits, traditional experimentation poses drawbacks such as time and cost constraints. Hence, employing efficient simulation models is recommended to streamline processes, save resources, and enhance accuracy. This article focuses on developing a computer simulation model for magnetron sputtering deposition, particularly targeting semiconductor materials like silicon (Si) and germanium (Ge) used in modern photovoltaic cells, as well as common electronic components like copper (Cu) and silver (Ag). The simulation model, employing Monte Carlo analysis, accurately predicts thin film deposition and thickness while considering factors such as ejected atom flow, energy, direction, and collision dynamics. The impact of target-substrate distance on deposition performance is also investigated. Comparative analysis between our simulation data and previous works validates the efficacy of the proposed model.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"324 - 333"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573690","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 Porosity and Pore Size of a Silicon Target on the Laser Ablation Threshold 硅靶的孔隙率和孔径对激光烧蚀阈值的影响
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624601055
M. S. Grigoryeva, I. N. Zavestovskaya, A. P. Kanavin, A. A. Fronya, E. I. Mavreshko
{"title":"Effect of Porosity and Pore Size of a Silicon Target on the Laser Ablation Threshold","authors":"M. S. Grigoryeva,&nbsp;I. N. Zavestovskaya,&nbsp;A. P. Kanavin,&nbsp;A. A. Fronya,&nbsp;E. I. Mavreshko","doi":"10.3103/S1068335624601055","DOIUrl":"10.3103/S1068335624601055","url":null,"abstract":"<p>Laser ablation of a porous silicon target irradiated by ultrashort IR laser pulses in an air environment is simulated using the molecular dynamic approach. The number of ablated atoms is calculated for targets with different porosity and pore size. It is found that a porous silicon target with 1 nm pore size is ablated more efficiently at low laser pulse fluences. It is shown that an increase in the target porosity leads to a decrease in the ablation threshold: with a change in porosity from 10 to 50%, the laser ablation threshold decreases by more than 1.5 times. The obtained results can be applied to optimize the regimes of laser ablation synthesis of nanoparticles using nanostructured porous silicon targets.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"353 - 359"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573674","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
Irregularity in the Primary Cosmic Rays Mass Composition at an Energy of ~10 PeV 能量约为 10 PeV 的初级宇宙线质量组成的不规则性
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624600943
S. E. Pyatovsky
{"title":"Irregularity in the Primary Cosmic Rays Mass Composition at an Energy of ~10 PeV","authors":"S. E. Pyatovsky","doi":"10.3103/S1068335624600943","DOIUrl":"10.3103/S1068335624600943","url":null,"abstract":"<p>Irregularity in the mass composition of primary cosmic rays (PCR) at an energy of ∼10 PeV is reviewed. To assess changes of the PCR mass composition, the X-ray emulsion chamber (XREC) method and the halo-method based on XREC were used. The study of changes in the PCR mass composition was carried out based on experimentally obtained characteristics of the extensive air shower (EAS) trunks, where fluctuations of these characteristics are minimal and information about the primary interaction of PCR nuclei with atmospheric atoms is maximally preserved. It is shown that at an <i>E</i><sub>0</sub> = 10 PeV there is a local maximum of the heavy nuclei fraction. This maximum is correlated with the PCR sources including stars of variable SR (red giants and super-giants) and WR (Wolf-Rayet) types.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"371 - 378"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573670","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
Application of the KFParticle Package for Reconstruction of the Primary Vertex of Interaction in the SPD Experiment 应用 KFP 粒子软件包重建 SPD 实验中的主要相互作用顶点
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624600979
V. F. Andreev
{"title":"Application of the KFParticle Package for Reconstruction of the Primary Vertex of Interaction in the SPD Experiment","authors":"V. F. Andreev","doi":"10.3103/S1068335624600979","DOIUrl":"10.3103/S1068335624600979","url":null,"abstract":"<p>The article considers the possibility of using the KFParticle package developed for the reconstruction of short-lived particles also for the reconstruction of the primary vertex of interactions in the SPD experiment at the NICA collider. A comparison is made with the algorithm for reconstruction of the primary vertex currently used in the SPD experiment.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"319 - 323"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573673","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
A Study of Reactions with Light Nuclei Using a Position Sensitive Fast Neutron Detector 使用位置敏感型快速中子探测器对轻核反应的研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624600657
S. I. Potashev, I. V. Meshkov, A. A. Afonin, Yu. M. Burmistrov, A. I. Drachev, S. Kh. Karaevsky, A. A. Kasparov, V. N. Ponomarev, V. I. Razin
{"title":"A Study of Reactions with Light Nuclei Using a Position Sensitive Fast Neutron Detector","authors":"S. I. Potashev,&nbsp;I. V. Meshkov,&nbsp;A. A. Afonin,&nbsp;Yu. M. Burmistrov,&nbsp;A. I. Drachev,&nbsp;S. Kh. Karaevsky,&nbsp;A. A. Kasparov,&nbsp;V. N. Ponomarev,&nbsp;V. I. Razin","doi":"10.3103/S1068335624600657","DOIUrl":"10.3103/S1068335624600657","url":null,"abstract":"<p>A position-sensitive detector, which is a neutron target at the same time, is presented to study the interaction reactions of fast neutrons of above 1 MeV with light nuclei, in particular, with the <sup>10</sup>B nucleus. It contains two boron-10 layers and a system of wire electrodes to identify secondary nuclei, in particular <sup>3</sup>H and <sup>4</sup>He, and to determine energy loss and departure angle. Thus the neutron energy can be determined.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"334 - 338"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573688","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
Dependence of Properties of Zirconium Nitride Nanoparticles Prepared by Laser Ablation in Liquids on Synthesis Parameters 在液体中通过激光烧蚀制备的氮化锆纳米粒子的特性与合成参数的关系
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2024-11-03 DOI: 10.3103/S1068335624601110
I. V. Sozaev, G. V. Tikhonowski, M. S. Savinov, A. A. Popov, A. A. Laktionov, A. P. Kanavin, I. N. Zavestovskaya, S. M. Klimentov, A. I. Pastukhov, A. V. Kabashin
{"title":"Dependence of Properties of Zirconium Nitride Nanoparticles Prepared by Laser Ablation in Liquids on Synthesis Parameters","authors":"I. V. Sozaev,&nbsp;G. V. Tikhonowski,&nbsp;M. S. Savinov,&nbsp;A. A. Popov,&nbsp;A. A. Laktionov,&nbsp;A. P. Kanavin,&nbsp;I. N. Zavestovskaya,&nbsp;S. M. Klimentov,&nbsp;A. I. Pastukhov,&nbsp;A. V. Kabashin","doi":"10.3103/S1068335624601110","DOIUrl":"10.3103/S1068335624601110","url":null,"abstract":"<p>This paper presents a study of the dependence of the size and optical characteristics, as well as the productivity of laser synthesis of zirconium nitride (ZrN) nanoparticles (NPs) on laser ablation parameters. It is shown that changing the distance between the focusing lens and the target surface allows one to control the mode and half-width of the size distribution from (59 ± 35 nm) to (29 ± 14 nm), as well as spectrally shift the plasmon resonance peak from 638 nm to 680 nm. Additionally, a possibility of controlling the size characteristics of ZrN NPs when changing the laser radiation energy is demonstrated. Increasing the laser pulse energy from 10 to 100 μJ makes it possible to vary the NP size from (27 ± 13 nm) to (47 ± 30 nm). The results form a quantitative basis for the production of laser-synthesized ZrN NPs with controlled size and optical properties for applications in biomedicine.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 9","pages":"360 - 364"},"PeriodicalIF":0.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573689","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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