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Bulletin of the Lebedev Physics Institute最新文献

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Evaluation of Neutron Field Parameters at the VITA Facility Using Geant4 Simulation 利用 Geant4 仿真评估 VITA 设施的中子场参数
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602371
M. Yu. Azarkin, I. N. Zavestovskaya, M. R. Kirakosyan, D. S. Petrunya, D. A. Kasatov, V. D. Konovalova, S. Yu. Taskaev
{"title":"Evaluation of Neutron Field Parameters at the VITA Facility Using Geant4 Simulation","authors":"M. Yu. Azarkin,&nbsp;I. N. Zavestovskaya,&nbsp;M. R. Kirakosyan,&nbsp;D. S. Petrunya,&nbsp;D. A. Kasatov,&nbsp;V. D. Konovalova,&nbsp;S. Yu. Taskaev","doi":"10.3103/S1068335624602371","DOIUrl":"10.3103/S1068335624602371","url":null,"abstract":"<p>Parameters of the neutron field generated at the VITA (Vacuum Insulated Tandem Accelerator) installation are assessed using Monte Carlo simulation in the Geant4 software package. A detailed model of the target section of the installation is developed, including the output accelerator tube, frontal lithium target for neutron generation, backplate cooling system, and neutron moderator system. The simulation makes it possible to obtain the energy and spatial distributions of the neutron flux intensities in the configuration intended for irradiation of small biological objects at a proton energy of 2.05 MeV. It is shown that the obtained calculated values of the neutron flux intensities correspond to the target values, providing acceptable time intervals for irradiating biological objects. Moreover, the transverse profiles of the simulated neutron field are consistent with the experimental data and preliminary theoretical expectations. The developed model can be used for dose planning in experiments on irradiation of small biological objects in vitro and in vivo and for further optimization of the neutron beam formation system to increase a therapeutic index in neutron capture therapy.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"72 - 77"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761765","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 Laser Transfer Regimes to Increase the Efficiency of Application of Antibacterial Silver Nanoparticles 提高抗菌银纳米粒子应用效率的激光转移机制研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602462
A. A. Nastulyavichus, E. R. Tolordava, E. V. Ulturgasheva, S. N. Shelygina, S. P. Babina, I. N. Saraeva, S. I. Kudryashov
{"title":"Study of Laser Transfer Regimes to Increase the Efficiency of Application of Antibacterial Silver Nanoparticles","authors":"A. A. Nastulyavichus,&nbsp;E. R. Tolordava,&nbsp;E. V. Ulturgasheva,&nbsp;S. N. Shelygina,&nbsp;S. P. Babina,&nbsp;I. N. Saraeva,&nbsp;S. I. Kudryashov","doi":"10.3103/S1068335624602462","DOIUrl":"10.3103/S1068335624602462","url":null,"abstract":"<p>The paper examines the antibacterial effect of silver nanoparticles applied by laser-induced forward transfer to infected pig skin as a function of the transfer regime and film thickness. Optimal regime of nanoparticle application are found, with the minimum inhibitory concentration against gram-positive bacteria Staphylococcus aureus being about 3 μg/cm<sup>2</sup>.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"82 - 87"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761786","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
Optimal Composition of the Ar‒He Mixture of Atmospheric Pressure for Production of Metastable Argon Atoms in a Nanosecond Repetitively Pulsed Discharge 在纳秒重复脉冲放电中制备亚稳氩原子的Ar-He混合物的最佳组成
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624601882
M. V. Zagidullin, P. A. Mikheyev, R. A. Kuramshin, A. D. Dvornikov
{"title":"Optimal Composition of the Ar‒He Mixture of Atmospheric Pressure for Production of Metastable Argon Atoms in a Nanosecond Repetitively Pulsed Discharge","authors":"M. V. Zagidullin,&nbsp;P. A. Mikheyev,&nbsp;R. A. Kuramshin,&nbsp;A. D. Dvornikov","doi":"10.3103/S1068335624601882","DOIUrl":"10.3103/S1068335624601882","url":null,"abstract":"<p>Use is made of the 0D kinetic model to calculate the optimal composition of the Ar‒He mixture of atmospheric pressure in a nanosecond repetitively pulsed discharge (NRPD) generating excited argon atoms Ar* at an average density of ~10<sup>13</sup> cm<sup>–3</sup> over the period. The optimal argon content is found, at which the minimum, reduced electric field amplitude <i>E</i>/<i>N</i> dependent on the NRPD parameters is required. In particular, the optimal argon content at plasma temperatures of 300 and 700 K is found to be ~0.3% and ~1%, respectively. The optimal argon content is practically independent of the pulse duration, pulse shape, interelectrode distance, and content of stray quenching impurities [up to ~(0.5–5) × 10<sup>‒2</sup> Torr of atmospheric gases]. Heat release in the discharge is calculated as a function of the composition of the Ar‒He mixture.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"48 - 55"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761652","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
In-Vivo Studies of Wound Healing Properties of Antibacterial Copper Nanoparticles 抗菌铜纳米颗粒伤口愈合性能的体内研究
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602450
A. A. Nastulyavichus, E. R. Tolordava, E. V. Ulturgasheva, S. N. Shelygina, S. P. Babina, I. N. Saraeva, S. I. Kudryashov
{"title":"In-Vivo Studies of Wound Healing Properties of Antibacterial Copper Nanoparticles","authors":"A. A. Nastulyavichus,&nbsp;E. R. Tolordava,&nbsp;E. V. Ulturgasheva,&nbsp;S. N. Shelygina,&nbsp;S. P. Babina,&nbsp;I. N. Saraeva,&nbsp;S. I. Kudryashov","doi":"10.3103/S1068335624602450","DOIUrl":"10.3103/S1068335624602450","url":null,"abstract":"<p>The rate of wound healing on white laboratory mice BALB/C was assessed after application of antibacterial copper nanoparticles with a surface mass density of ≈30 μg/cm<sup>2</sup> by laser-induced forward transfer from a 100-nm thick copper film. For comparison, a group of mice with untreated wounds was used as a control group. As a result, copper nanoparticles were shown to have a wound-healing effect without causing harm to the mice themselves.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"88 - 94"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761787","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
Elemental Boron-10 Nanoparticles Synthesized by Laser Fragmentation for Boron Neutron Capture Therapy: In Vitro Experiments 用于硼中子俘获疗法的激光碎裂法合成的元素硼-10 纳米粒子：体外实验
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602541
A. I. Kasatova, K. S. Kuzmina, D. A. Kasatov, E. V. Barmina, K. O. Aiyyzhy, P. A. Kotelnikova, M. S. Grigoryeva, D. S. Petrunya, E. L. Zavjalov, S. Yu. Taskaev, S. M. Deyev, I. N. Zavestovskaya
{"title":"Elemental Boron-10 Nanoparticles Synthesized by Laser Fragmentation for Boron Neutron Capture Therapy: In Vitro Experiments","authors":"A. I. Kasatova,&nbsp;K. S. Kuzmina,&nbsp;D. A. Kasatov,&nbsp;E. V. Barmina,&nbsp;K. O. Aiyyzhy,&nbsp;P. A. Kotelnikova,&nbsp;M. S. Grigoryeva,&nbsp;D. S. Petrunya,&nbsp;E. L. Zavjalov,&nbsp;S. Yu. Taskaev,&nbsp;S. M. Deyev,&nbsp;I. N. Zavestovskaya","doi":"10.3103/S1068335624602541","DOIUrl":"10.3103/S1068335624602541","url":null,"abstract":"<p>Elemental boron-10 nanoparticles synthesized by laser fragmentation of micropowder in isopropanol are used for the first time as a boron-containing agent for boron neutron capture therapy. The study is conducted on human cell cultures U87, BT474, and BJ-5TA. It is found that these nanoparticles are nontoxic to all three cell cultures at boron-10 concentrations required for successful boron neutron capture therapy. The cell cultures are pre-incubated with nanoparticles and then irradiated for 30 min with a beam of epithermal neutrons generated by the VITA accelerator source (BINP SB RAS, Novosibirsk). Using in vitro study results (MTT assay and clonogenic analysis), an enhancement of the therapeutic effect of boron neutron capture therapy is observed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"95 - 102"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761763","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
New Method for TiO2 Particle Detection in Plastic 塑料中TiO2颗粒检测的新方法
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602383
D. F. Aminev, E. E. Onishchenko, S. I. Chentsov
{"title":"New Method for TiO2 Particle Detection in Plastic","authors":"D. F. Aminev,&nbsp;E. E. Onishchenko,&nbsp;S. I. Chentsov","doi":"10.3103/S1068335624602383","DOIUrl":"10.3103/S1068335624602383","url":null,"abstract":"<p>Raman scattering and photoluminescence techniques are used to study polystyrene containing TiO<sub>2</sub> (the white dye pigment). It is shown that the spectral features of TiO<sub>2</sub> emission, caused by the vanadium intrinsic impurity in TiO<sub>2</sub>, can be used as a luminescent marker that allows the presence of TiO<sub>2</sub> particles in plastic to be determined.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"78 - 81"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761785","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
Destructive Quantum Interference in Bicyclic Conjugated Hydrocarbons 双环共轭烃的破坏性量子干涉
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602322
N. M. Shubin, A. A. Gorbatsevich
{"title":"Destructive Quantum Interference in Bicyclic Conjugated Hydrocarbons","authors":"N. M. Shubin,&nbsp;A. A. Gorbatsevich","doi":"10.3103/S1068335624602322","DOIUrl":"10.3103/S1068335624602322","url":null,"abstract":"<p>We theoretically study coherent transport of charge carriers in molecular conductors based on bicyclic conjugated hydrocarbons. In the case of electrodes attached to the same cycle, within the framework of the Huckel model (the tight-binding model) without taking into account the electron-electron interaction, an analytical expression for the numerator of the transmission coefficient is derived, which zeroes determine energies of antiresonances. Analysis of this expression allowed us to formulate a relatively simple and clear rule for determining the presence/absence of destructive quantum interference near the Fermi energy, which, in essence, comes down to counting the number of atoms in the cycles and their mutual arrangement, as well as their arrangement relative to the electrodes. In particular, the proposed model correctly agrees with the results of numerical simulation and experiment for the azulene molecule, which did not fit into the previously proposed similar schematic rules.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"56 - 61"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761655","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
Two-Color Picosecond Raman Laser on Water with Multiple Temporal Compression of the Stokes Pulse in a Collimated Beam 准直光束中斯托克斯脉冲多重时间压缩的水中双色皮秒拉曼激光器
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-03 DOI: 10.3103/S1068335624602498
S. M. Pershin, M. Ya. Grishin, V. N. Lednev, V. A. Orlovich, V. A. Zavozin, E. V. Shashkov, G. A. Boldin
{"title":"Two-Color Picosecond Raman Laser on Water with Multiple Temporal Compression of the Stokes Pulse in a Collimated Beam","authors":"S. M. Pershin,&nbsp;M. Ya. Grishin,&nbsp;V. N. Lednev,&nbsp;V. A. Orlovich,&nbsp;V. A. Zavozin,&nbsp;E. V. Shashkov,&nbsp;G. A. Boldin","doi":"10.3103/S1068335624602498","DOIUrl":"10.3103/S1068335624602498","url":null,"abstract":"<p>For the first time to our knowledge, we report a 10-fold temporal compression of stimulated Raman scattering (SRS) pulses in bulk double distilled water in a 30-cm long cuvette pumped by a collimated beam of a picosecond Nd<sup>3+</sup>:YAP laser (60 ps, 540 nm). The effect of the pump pulse forerunning by the SRS pulse due to group velocity mismatch and a large red shift of the Stokes component of SRS pulses in water on the Stokes pulse temporal compression coefficient is discussed.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 2","pages":"43 - 47"},"PeriodicalIF":0.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761653","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
Enhancement of IR Absorption of Silicon by Its Doping with Sulfur Atoms 硫原子掺杂增强硅的红外吸收
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-02 DOI: 10.3103/S1068335624602139
I. M. Podlesnykh, M. S. Kovalev, E. N. Kabachkov, V. A. Dravin, S. I. Kudryashov
{"title":"Enhancement of IR Absorption of Silicon by Its Doping with Sulfur Atoms","authors":"I. M. Podlesnykh,&nbsp;M. S. Kovalev,&nbsp;E. N. Kabachkov,&nbsp;V. A. Dravin,&nbsp;S. I. Kudryashov","doi":"10.3103/S1068335624602139","DOIUrl":"10.3103/S1068335624602139","url":null,"abstract":"<p>The extension of the spectral absorption range of crystalline silicon to the near- and mid-IR region is possible by doping it using ion implantation and subsequent annealing methods. Pulsed laser annealing makes it possible to eliminate ion-induced defects, which leads to recrystallization of the crystal structure, and activation of impurities. The crystal structure of the obtained samples, as well as their chemical, optical, and electrical characteristics are analyzed comprehensively.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 1","pages":"7 - 13"},"PeriodicalIF":0.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749176","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
Spontaneous Nucleation of Diamond in a Methane–Hydrogen Microwave Plasma on YAG:Ce Particles 甲烷-氢微波等离子体中YAG:Ce粒子上金刚石的自发成核
IF 0.6 4区 物理与天体物理
Bulletin of the Lebedev Physics Institute Pub Date : 2025-04-02 DOI: 10.3103/S106833562460205X
V. S. Sedov, A. K. Martyanov, S. V. Kuznetsov, I. A. Tiazhelov, S. S. Savin, L. V. Tarala, V. I. Konov
{"title":"Spontaneous Nucleation of Diamond in a Methane–Hydrogen Microwave Plasma on YAG:Ce Particles","authors":"V. S. Sedov,&nbsp;A. K. Martyanov,&nbsp;S. V. Kuznetsov,&nbsp;I. A. Tiazhelov,&nbsp;S. S. Savin,&nbsp;L. V. Tarala,&nbsp;V. I. Konov","doi":"10.3103/S106833562460205X","DOIUrl":"10.3103/S106833562460205X","url":null,"abstract":"<p>The effect of spontaneous nucleation of the diamond phase on cerium-doped yttrium aluminum garnet (YAG:Ce) particles is observed under the action of a microwave plasma in a methane‒hydrogen gas mixture at a substrate temperature of 820°C. These conditions facilitate the process of “chemical vapor deposition (CVD) of diamond” (CVD), but the synthesis of diamond films requires additional procedures to stimulate nucleation. It is shown that YAG:Ce particles can be used as diamond nucleation centers. After the 20-min CVD process, diamond particles of different sizes and a density of ≈10<sup>6</sup> cm<sup>‒2</sup>, which is 15‒20% of the deposition density of YAG:Ce particles, are detected by SEM. Luminescence bands from Ce<sup>3+</sup> ions (550 nm) and Si-V centers in diamond (738 nm) are detected in the photoluminescence spectra of the synthesized diamond crystallites. The observed effect is interesting for studying the processes of diamond phase growth by the CVD method, especially in the synthesis of diamond composites for the tasks of visualizing high-power X-ray radiation.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"52 1","pages":"31 - 36"},"PeriodicalIF":0.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749177","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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