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Bulletin of the Russian Academy of Sciences: Physics最新文献

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New Results of the pp-Scattering Simulation for the Beam–Beam Counter at NICA SPD NICA SPD光束计数器pp-散射模拟的新结果
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712061
A. A. Terekhin, V. V. Abramov, I. S. Volkov, V. P. Ladygin
{"title":"New Results of the pp-Scattering Simulation for the Beam–Beam Counter at NICA SPD","authors":"A. A. Terekhin,&nbsp;V. V. Abramov,&nbsp;I. S. Volkov,&nbsp;V. P. Ladygin","doi":"10.1134/S1062873825712061","DOIUrl":"10.1134/S1062873825712061","url":null,"abstract":"<p><i>pp-</i>Collisions were simulated at a total energy of up to 27 GeV for the Beam–Beam Counter of the Spin Physics Detector of the NICA collider. The simulation was performed using the Pythia8 generator within the SPDRoot framework. Estimates were made of the influence of a magnetic field on the asymmetries of the inclusive production of charged particles and on the Beam–Beam Counter loads.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1291 - 1295"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Nanocarbon Spontaneous Emission Centers on the Cathodes of Multiwire Proportional Chambers of the LHCb Muon Detector LHCb介子探测器多线比例室阴极上纳米碳自发发射中心的研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712115
G. E. Gavrilov, M. E. Buzoverya, A. Radulović, A. Yu. Arkhipov, A. A. Dzyuba, I. A. Karpov, O. E. Maev, D. Bajuk-Bogdanović, N. Begović
{"title":"Study of Nanocarbon Spontaneous Emission Centers on the Cathodes of Multiwire Proportional Chambers of the LHCb Muon Detector","authors":"G. E. Gavrilov,&nbsp;M. E. Buzoverya,&nbsp;A. Radulović,&nbsp;A. Yu. Arkhipov,&nbsp;A. A. Dzyuba,&nbsp;I. A. Karpov,&nbsp;O. E. Maev,&nbsp;D. Bajuk-Bogdanović,&nbsp;N. Begović","doi":"10.1134/S1062873825712115","DOIUrl":"10.1134/S1062873825712115","url":null,"abstract":"<p>It is found that nanocarbon structures are formed on the cathodes of multiwire proportional chambers of the LHCb muon detector as a result of long-term operation in experiments at the Large Hadron Collider. The appearance of nanocarbon structures on the copper cathode initiates spontaneous generation of self-sustained currents in proportional chambers. Emission centers grow due to absorption of dissociation products of gas mixture components on the copper cathode. The process occurs under normal conditions, which is unusual for nanostructures, and it is not reproducible in laboratory aging tests.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1317 - 1328"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Applicability of the EPOS4 and URQMD (LHC) Generators for the Analysis of 7-TeV pp-Collisions EPOS4和URQMD （LHC）发生器在7-TeV质子对撞分析中的适用性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712140
K. V. Razmyslov, V. V. Monakhov, F. F. Valiev, M. A. Zharov
{"title":"On the Applicability of the EPOS4 and URQMD (LHC) Generators for the Analysis of 7-TeV pp-Collisions","authors":"K. V. Razmyslov,&nbsp;V. V. Monakhov,&nbsp;F. F. Valiev,&nbsp;M. A. Zharov","doi":"10.1134/S1062873825712140","DOIUrl":"10.1134/S1062873825712140","url":null,"abstract":"<p>The results of operation of the EPOS4 and URQMD 3.4 (LHC) event generators were compared by the example of simulation of <i>pp</i>-collisions at ultrahigh energies (7 TeV). Violation of the laws of conservation of baryon and lepton charges and conservation of energy in EPOS4 was shown. A comparison with experimental data was made, and the influence of event filtering by conservation of energy and baryon and lepton charges on the multiplicity distribution in the pseudorapidity range |η| ≤ 1.5 was studied.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1343 - 1346"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Emission of High-Energy 4He and 6,7Li Nuclei in Nuclear Reaction of 56Fe Ions on 238U Target 238U靶上56Fe离子核反应中高能4He和6,7 li核的发射
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825711924
V. A. Maslov, S. M. Lukyanov, V. V. Samarin, Yu. E. Penionzhkevich, M. A. Naumenko
{"title":"Emission of High-Energy 4He and 6,7Li Nuclei in Nuclear Reaction of 56Fe Ions on 238U Target","authors":"V. A. Maslov,&nbsp;S. M. Lukyanov,&nbsp;V. V. Samarin,&nbsp;Yu. E. Penionzhkevich,&nbsp;M. A. Naumenko","doi":"10.1134/S1062873825711924","DOIUrl":"10.1134/S1062873825711924","url":null,"abstract":"<p>Energy spectra of alpha particles and <sup>6,7</sup>Li nuclei emitted at an angle of 0° in the reaction of a <sup>56</sup>Fe beam (400 MeV) on a <sup>238</sup>U target are measured using a high-resolution magnetic spectrometer (MAVR facility). These particles are emitted in a wide energy range (up to 120‒130 MeV). Several ways for the production of these nuclei associated with the processes of multinucleon transfer and incomplete fusion are proposed based on the analysis of the kinematic limits of the exit channels and the application of the moving source model.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1195 - 1203"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Towards Understanding of (K_{s}^{0}) Meson Production in Proton–Proton Interactions 对(K_{s}^{0})质子-质子相互作用中介子产生的认识
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S106287382571205X
A. Galoyan, A. Ribon, V. Uzhinsky
{"title":"Towards Understanding of (K_{s}^{0}) Meson Production in Proton–Proton Interactions","authors":"A. Galoyan,&nbsp;A. Ribon,&nbsp;V. Uzhinsky","doi":"10.1134/S106287382571205X","DOIUrl":"10.1134/S106287382571205X","url":null,"abstract":"<p>Mechanisms of <span>(K_{s}^{0})</span> meson production can be studied using two-particle transverse-momentum (<i>P</i><sub><i>T</i></sub>) correlations. The correlations between <span>(K_{s}^{0})</span> mesons and hadrons produced in proton–proton interactions at center-of-mass energy of NN collisions of 10 GeV are considered in the Geant4/FTF and Pythia 6.4 models. The strong <i>P</i><sub><i>T</i></sub> correlations between <span>(K_{s}^{0})</span> mesons and Λ hyperons, <i>K</i><sup><i>±</i></sup> mesons, and protons are observed. The study of the two-particle correlations is important to clarify the particle fragmentation functions and can be implemented at NICA SPD experiment.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1284 - 1290"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detector Optimization Based on Artificial Neural Network Training 基于人工神经网络训练的检测器优化
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712139
V. A. Roudnev, K. A. Galaktionov, F. F. Valiev
{"title":"Detector Optimization Based on Artificial Neural Network Training","authors":"V. A. Roudnev,&nbsp;K. A. Galaktionov,&nbsp;F. F. Valiev","doi":"10.1134/S1062873825712139","DOIUrl":"10.1134/S1062873825712139","url":null,"abstract":"<p>Artificial neural networks were used for event-wise analysis of model data for a microchannel plate detector. Based on this data, the impact parameter and the collision point coordinates for each event were estimated. An analysis based on several Monte-Carlo collision models was performed. Even though the quality of the existing models of events is not sufficient for a reliable, model-independent estimation of the collision parameters, the proposed method of parameter reconstruction allows one to estimate the optimal technical characteristics of the detector.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1335 - 1342"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Formation of Correlated Charged Particles during the Absorption of π– Mesons on a Live Target π介子在活靶上吸收过程中相关带电粒子的形成
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712036
Yu. B. Gurov, S. A. Evseev, S. V. Rozov, V. G. Sandukovskii, B. A. Chernyshev
{"title":"Formation of Correlated Charged Particles during the Absorption of π– Mesons on a Live Target","authors":"Yu. B. Gurov,&nbsp;S. A. Evseev,&nbsp;S. V. Rozov,&nbsp;V. G. Sandukovskii,&nbsp;B. A. Chernyshev","doi":"10.1134/S1062873825712036","DOIUrl":"10.1134/S1062873825712036","url":null,"abstract":"<p>The energy spectra were analyzed for correlated pairs of single-charged particles emitted at an angle of 180° by the nuclei of a “live” target (an analogue of the <sup>28</sup>Si target) during the absorption of stopped π<sup>−</sup> mesons. The information obtained with the help of the live target is interesting for testing hypotheses about the mechanisms of formation of complex particles. Data analysis made it possible to detect complex particles, both of cluster (direct) origin and formed because of secondary intranuclear interactions.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1269 - 1272"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation and Conduction of Experiments on the Irradiation of Biological Models in a Proton Beam 质子束辐照生物模型实验的制备与传导
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825711936
S. V. Akulinichev, Yu. K. Gavrilov, V. V. Martynova, G. V. Merzlikin, I. A. Yakovlev
{"title":"Preparation and Conduction of Experiments on the Irradiation of Biological Models in a Proton Beam","authors":"S. V. Akulinichev,&nbsp;Yu. K. Gavrilov,&nbsp;V. V. Martynova,&nbsp;G. V. Merzlikin,&nbsp;I. A. Yakovlev","doi":"10.1134/S1062873825711936","DOIUrl":"10.1134/S1062873825711936","url":null,"abstract":"<p>Experiments on proton irradiation of biological models in flash therapy modes by the example of fertilized eggs of Japanese quail (<i>Coturnix japonica</i>) were prepared and conducted at the accelerator of the Institute for Nuclear Research (INR), Russian Academy of Sciences (RAS), Moscow, Russia. Computer simulation of the INR RAS setup was performed using Geant4 libraries, and the simulation results were evaluated.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1204 - 1208"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation of Operation of an Electron–Positron Pair Spectrometer in a Setup for Studying the Reactions between Fast Neutron and Light Nucleus 电子-正电子对谱仪在快中子与轻核反应研究装置中的运行计算
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712073
E. A. Permyakov, S. I. Potashev
{"title":"Calculation of Operation of an Electron–Positron Pair Spectrometer in a Setup for Studying the Reactions between Fast Neutron and Light Nucleus","authors":"E. A. Permyakov,&nbsp;S. I. Potashev","doi":"10.1134/S1062873825712073","DOIUrl":"10.1134/S1062873825712073","url":null,"abstract":"<p>The motion of electrons and positrons was modeled in a spectrometer based on a constant magnetic dipole and their subsequent detection in position-sensitive silicon detectors. The electron and positron emission energy and angle resolutions were obtained. The spectrometer is a part of setup for studying rare intranuclear processes in light nuclei with the production of internal conversion pairs.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1296 - 1301"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cross Sections of Photoneutron Reactions for Light and Medium-Heavy Nuclei in Experiments on Bremsstrahlung Beams 轫致辐射束实验中轻核和中重核的光子中子反应截面
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-08-18 DOI: 10.1134/S1062873825712000
V. V. Varlamov, A. I. Davydov, I. A. Mostakov, V. N. Orlin
{"title":"Cross Sections of Photoneutron Reactions for Light and Medium-Heavy Nuclei in Experiments on Bremsstrahlung Beams","authors":"V. V. Varlamov,&nbsp;A. I. Davydov,&nbsp;I. A. Mostakov,&nbsp;V. N. Orlin","doi":"10.1134/S1062873825712000","DOIUrl":"10.1134/S1062873825712000","url":null,"abstract":"<p>Objective physical criteria of data reliability allowed us to analyze the cross sections of photoneutron partial reactions (γ, 1<i>n</i>) and (γ, 2<i>n</i>) on <sup>52</sup>Cr and <sup>90</sup>Zr nuclei obtained on bremsstrahlung γ-radiation beams by introducing corrections calculated on the base of statistical theory to the neutron yield cross section σ(γ, <i>xn</i>) = σ(γ, 1<i>n</i>) + 2σ(γ, 2<i>n</i>). The reasons why the experimental data for the <sup>90</sup>Zr nucleus fully satisfy the physical criteria, while there are serious doubts in reliability of data for <sup>52</sup>Cr nucleus, are discussed.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 8","pages":"1246 - 1253"},"PeriodicalIF":0.48,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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