Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques最新文献_第6页

Mechanisms of the Volume Capture of Fast Charged Particles in a Curved Single Crystal 弯曲单晶中快速带电粒子的体积捕获机制

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700387

E. A. Mazur

{"title":"Mechanisms of the Volume Capture of Fast Charged Particles in a Curved Single Crystal","authors":"E. A. Mazur","doi":"10.1134/S1027451025700387","DOIUrl":"10.1134/S1027451025700387","url":null,"abstract":"The effect of the volume capture of fast charged particles in a curved single crystal is studied. The transverse energy losses, the hovering effect, and the criterion for the volume capture of fast charged particles are studied. Possible mechanisms of volume capture are considered: transverse energy losses due to crystal excitation by a fast charged particle (proton, lepton), multiple scattering of particles in a curved crystal, and elastic scattering and diffraction of particles in a curved crystal. It is shown that in the hovering region, the ratio of the loss rates of the transverse and longitudinal energy of fast charged particles increases significantly compared to the ratio of the longitudinal and transverse energies and is equal in order of magnitude to the ratio of the off-diagonal elements of the inverse dielectric permittivity matrix to the diagonal ones. It is established that the effect of the volume capture of fast protons (leptons) is due to diffraction in a curved crystal, as well as the effects of damping of the off-diagonal elements of the particle density matrix. The proposed diffraction mechanism is based on taking into account the quantum coherent scattering of a fast proton (lepton) in a curved crystal.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"276 - 284"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021622","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

Initiation of Periodic Relief Development on the Silicon Surface under Ion Irradiation 离子辐照下硅表面周期性起伏发育的起始

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S102745102570051X

M. A. Smirnova, V. I. Bachurin, L. A. Mazaletsky, D. E. Pukhov, A. B. Churilov

引用次数: 0

Action of a High-Power Ion Beam of Nanosecond Duration on Commercial AlN Ceramics 纳秒级高功率离子束对商用AlN陶瓷的作用

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700454

V. S. Kovivchak

引用次数: 0

Energy Spectra of Atoms Sputtered by Low-Energy Ions: Computer Simulation 低能离子溅射原子的能谱：计算机模拟

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700478

V. I. Shulga

引用次数: 0

Modification of the Structure and Elastic-Strength Properties of Elastomers Based on Nitrile Butadiene Rubber with the X-ray 用x射线改性丁腈橡胶弹性体的结构和弹性强度

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700806

N. G. Valko, A. V. Kasperovich, A. A. Skaskevich, T. Yu. Nikonova, K. A. Zhuk

{"title":"Modification of the Structure and Elastic-Strength Properties of Elastomers Based on Nitrile Butadiene Rubber with the X-ray","authors":"N. G. Valko, A. V. Kasperovich, A. A. Skaskevich, T. Yu. Nikonova, K. A. Zhuk","doi":"10.1134/S1027451025700806","DOIUrl":"10.1134/S1027451025700806","url":null,"abstract":"Results of a study of the effect of X-rays of 100 kR/h on the structure, tribological and elastic properties of elastomers based on nitrile-butadiene rubber with degrees of vulcanization of t70 and t90 are presented. It is found that irradiation of rubber with an exposure dose up to 50 kR leads to an increase in the elongation at break and tensile strength due to a decrease in the degree of crystallinity and to an increase in the crosslink density and a decrease in the specific volume of the polymers. It is obtained that the X-ray irradiation of rubber with exposure doses in the range from 50 to 100 kR leads to an increase in a degree of crystallinity and to deterioration in elastic-strength properties of rubber. It is suggested that the crosslinks of elastomers based on nitrile-butadiene rubber break after the X-ray exposure of dose in the range from 50 to 100 kR. The established nonlinear dependences of the elastic-strength properties of nitrile butadiene rubber with degrees of vulcanization t70 and t90 from an exposure dose point to greatly depending of the rubber intermolecular crosslinks density from an exposure dose of the X-ray and time after exposure. It is obtained a radiation aging of NBR elastomers have been exposure with X-ray. It is established that 2 months after irradiation the elongation at break decreases for NBR elastomers samples and the coefficient of dynamic friction decreases at first and increases after a month.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"540 - 544"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021761","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

The Role of Electrostatic Field in the Appearance of a Narrow and Dense Layer of Metal Nanoparticles near the Surface of a Metal-Containing Dielectric after Electron Irradiation 电子辐照后，静电场在含金属电介质表面附近形成窄密金属纳米颗粒层中的作用

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700636

O. A. Podsvirov, D. A. Sokolova, V. B. Bondarenko

{"title":"The Role of Electrostatic Field in the Appearance of a Narrow and Dense Layer of Metal Nanoparticles near the Surface of a Metal-Containing Dielectric after Electron Irradiation","authors":"O. A. Podsvirov, D. A. Sokolova, V. B. Bondarenko","doi":"10.1134/S1027451025700636","DOIUrl":"10.1134/S1027451025700636","url":null,"abstract":"The work proposes a mechanism for the formation of a layered structure of metal nanoparticles in dielectrics irradiated with fast electrons. On the example of silver-containing glass, a model is discussed in which silver nanoparticles can accumulate under the surface in two layers: wide, at the depth of embedded primary electrons (~3 μm for 30 keV), and extremely narrow ~0.1 µm, closer to the surface (at a depth of ~0.5 μm). Both the first and second layers are due to strong electrostatic fields arising in the regions of embedded electrons (space negative charge) and near-surface positive space charge formed by true secondary electron emission. The process of diffusion of polarized silver atoms in the specified inhomogeneous electric field with a secondary electron emission coefficient greater than unity is considered. In the presented model of the distribution of space charge and electric field in silver-containing glass irradiated with fast electrons, an equilibrium profile of the concentration of silver atoms in the near-surface layer is obtained. It is shown that in the formed electric fields it is possible to form a structure with areas of enrichment and depletion of the specified impurity. The calculated values of the equilibrium concentrations of silver atoms at the surface may exceed the corresponding volume values by several times.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"433 - 436"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021679","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 Silicon Amorphization by Xenon Ions Using Transmission Electron Microscopy and Monte Carlo Simulation 用透射电镜和蒙特卡罗模拟研究氙离子对硅的非晶化

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700430

O. V. Podorozhniy, A. V. Rumyantsev, N. I. Borgardt, D. K. Minnebaev, A. E. Ieshkin

引用次数: 0

Anomaly in the Interaction between Microfocus Bremsstrahlung from a New 18 MeV Betatron-Based Source and a Sharp Edge of a Steel Plate 新型18mev betattron源微聚焦轫致辐射与钢板锐边相互作用的异常

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700405

M. M. Rychkov, V. V. Kaplin, V. A. Smolyanskii

{"title":"Anomaly in the Interaction between Microfocus Bremsstrahlung from a New 18 MeV Betatron-Based Source and a Sharp Edge of a Steel Plate","authors":"M. M. Rychkov, V. V. Kaplin, V. A. Smolyanskii","doi":"10.1134/S1027451025700405","DOIUrl":"10.1134/S1027451025700405","url":null,"abstract":"Images of the distribution of microfocus bremsstrahlung from a new source based on an 18 MeV betatron, which has passed a 0.4 mm thick steel plate with a 1.2 mm wide sharp edge, are presented. The photographs demonstrate an anomaly in the interaction between the microfocus bremsstrahlung and the plate tip in the form of a narrow dark stripe along the tip image, which indicates an increase in the radiation intensity in this area. The dark stripe provides a contrast in the tip image, which, together with the high sharpness due to the microfocus of the source, allows the tip position to be visualized with high precision. The dark stripe in the images was not observed when using radiation from 450 and 45 keV X-ray tubes with foci of 400 and 100 µm. The absorption of radiation ensures a smooth change in the blackening of the sharp edge and blurring of the tip in the image due to the size of the radiation source. The observed effect with microfocus radiation of the new source is determined by the scattering of radiation by the tip with the possible participation of wave effects, which needs to be further investigated.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"290 - 295"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021623","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

Tribological Properties of Steel Surface in the Presence of Thermolysis Products of Nickel and Zinc Carboxylates Based on Substituted Aromatic Acids 取代芳香酸基羧酸镍和锌热解产物存在下钢表面的摩擦学性能

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700545

E. G. Korzh, V. E. Burlakova, L. D. Popov, A. P. Evsyukov

引用次数: 0

Calculation of Binding Energy in a Fragment of a Teflon Molecule Using Density Functional Theory 用密度泛函理论计算聚四氟乙烯分子片段的结合能

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S102745102570048X

S. S. Moskalenko, Yu. A. Melkozerova, I. K. Gainullin

{"title":"Calculation of Binding Energy in a Fragment of a Teflon Molecule Using Density Functional Theory","authors":"S. S. Moskalenko, Yu. A. Melkozerova, I. K. Gainullin","doi":"10.1134/S102745102570048X","DOIUrl":"10.1134/S102745102570048X","url":null,"abstract":"To explain the increased yield of positive particles from the surface of a positively charged dielectric, a computer simulation was performed using the density functional theory. The model system was a fragment of a Teflon molecule (CF2) in a vacuum. The binding energy of atoms in this system in the neutral state (without removing electrons from the system) was calculated, after which a similar calculation was performed for an ionized fragment of the Teflon molecule (with the removal of one electron from the system of atoms). The calculations showed that the energy of complete dissociation of one fragment of the Teflon molecule in the neutral state is 11.02 eV, which agrees with the experimental data with good accuracy. The binding energy in the ionized fragment of the molecule is 2.86 eV, while the Teflon molecule fragment dissociates into a neutrally charged fluorine atom and a positively charged CF fragment. In calculations taking into account the dipole moment of the Teflon molecule fragment, the binding energy was equal to –2.75 eV, and the Teflon molecule fragment also dissociated into a neutral fluorine atom and a positively charged CF fragment. The obtained results may be the reason for the increased release of positive particles from the surface of a positively charged massive dielectric.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"334 - 338"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021586","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