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Artykuły w czasopismach na temat „Electron scattering”

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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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1

Vijetha, T., P. S. Mallick, R. Karthik i Kavitha Rajan. "Effect of Scattering Angle in Electron Transport of AlGaN and InGaN". Advances in Materials Science and Engineering 2022 (12.10.2022): 1–4. http://dx.doi.org/10.1155/2022/3017040.

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The scattering angle between electrons plays a very important role for the calculation of scattering probability. The probability of scattering is an essential parameter for the simulation of electron paths. In this work, we calculated the scattering probability with scattering angle in AlGaN and InGaN at 77 K and found that the lower angle scatterings only dominate.

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2

Dedulewich, S., Z. Kancleris, A. Matulis i Yu Pozhela. "Electron-electron scattering in hot electrons". Semiconductor Science and Technology 7, nr 3B (1.03.1992): B322—B323. http://dx.doi.org/10.1088/0268-1242/7/3b/081.

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3

Bariakhtar, I., i A. Nazarenko. "Potential Electron Scattering by Phosphorus Atom". Ukrainian Journal of Physics 59, nr 6 (czerwiec 2014): 596–600. http://dx.doi.org/10.15407/ujpe59.06.0596.

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4

Mallick, P. S., J. Kundu i C. K. Sarkar. "Calculation of ionized impurity-scattering probability with scattering angles in GaN". Canadian Journal of Physics 86, nr 8 (1.08.2008): 1023–26. http://dx.doi.org/10.1139/p08-027.

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The probability of scattering by ionized impurities has been calculated as function of the scattering angle for various energy values of the electrons in gallium nitride at 77 K. It is found that for electron energies higher than 0.1 eV, almost-zero angle scatterings are most prevalent.PACS Nos.: 72.10.–d, 72.20.Fr

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5

Achenefe, Y., T. Senbeta i V. N. Mal'nev. "Electron Scattering in Graphene by Remote Nanomagnets". Ukrainian Journal of Physics 61, nr 5 (maj 2016): 393–99. http://dx.doi.org/10.15407/ujpe61.05.0393.

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6

Kotera, Masatoshi, Keiji Yamamoto i Hiroshi Suga. "Applications of a direct simulation of electron scattering to quantitative electron-probe microanalysis". Proceedings, annual meeting, Electron Microscopy Society of America 50, nr 2 (sierpień 1992): 1670–71. http://dx.doi.org/10.1017/s0424820100132984.

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A direct simulation of electron scatterings in solids is developed. The simulation takes into account elastic processes, and inelastic processes including inner-shell electron ionization, conduction electron ionization, bulk plasmon excitation, and bulk plasmon decay. After the ionization and the plasmon decay processes, the trajectories of hot electrons which are liberated from atomic electrons are calculated, and cascade multiplication of hot electrons is simulated in the solid. The theoretical equations used in the present simulation are in the following. For the elastic scattering of electrons by an atomic potential, we use the Mott cross section, which is obtained by the partial wave expansion method of the solution of the Dirac wave equation. For the inner-shell electron ionization, we use the cross section obtained from the generalized oscillator strength for each sub-shell in an atom. Under a condition of the Born approximation, cross section of an inner-shell electron excitation to the various continuum angular momentum channels for ionization is calculated using the generalized oscillator strength.

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7

Walecka, J. D. "Electron scattering". Nuclear Physics A 574, nr 1-2 (lipiec 1994): 271–96. http://dx.doi.org/10.1016/0375-9474(94)90050-7.

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8

Shimizu, Ryuichi, i Ze-Jun Ding. "Electron Scattering in Solids". Proceedings, annual meeting, Electron Microscopy Society of America 48, nr 2 (12.08.1990): 4–5. http://dx.doi.org/10.1017/s0424820100133618.

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Monte Carlo simulation has been becoming most powerful tool to describe the electron scattering in solids, leading to more comprehensive understanding of the complicated mechanism of generation of various types of signals for microbeam analysis.The present paper proposes a practical model for the Monte Carlo simulation of scattering processes of a penetrating electron and the generation of the slow secondaries in solids. The model is based on the combined use of Gryzinski’s inner-shell electron excitation function and the dielectric function for taking into account the valence electron contribution in inelastic scattering processes, while the cross-sections derived by partial wave expansion method are used for describing elastic scattering processes. An improvement of the use of this elastic scattering cross-section can be seen in the success to describe the anisotropy of angular distribution of elastically backscattered electrons from Au in low energy region, shown in Fig.l. Fig.l(a) shows the elastic cross-sections of 600 eV electron for single Au-atom, clearly indicating that the angular distribution is no more smooth as expected from Rutherford scattering formula, but has the socalled lobes appearing at the large scattering angle.

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9

Shimizu, Ryuichi, i Hideki Yoshikawa. "Monte Carlo Simulation of Background in electron spectroscopies". Proceedings, annual meeting, Electron Microscopy Society of America 50, nr 2 (sierpień 1992): 1664–65. http://dx.doi.org/10.1017/s0424820100132959.

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Recent progress in getting precise knowledge on inelastic scattering, particularly, on dielectric functions for various types of material has been enabling the electron spectroscopic spectra obtained by Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS) and reflection electron energy loss spectroscopy (REELS) to be reproduced theoretically with considerable success. For this Monte Carlo simulation is probably most powerful tool, leading to more comprehensive understanding of not only the signal generation but also the background formation.In this paper we present a Monte Carlo simulation approach based on the uses of Mott-scattering cross section and appropriate dielectric function for describing elastic scattering and inelastic scatterings, respectively. With respect to the dielectric function one can use, to good approximation in general, the optical dielectric constants from the data base provided by synchrotron radiation facilities.As typical examples of the Monte Carlo simulation the applications to the AES, XPS, and REELS are shown in Figs. 1, 2, and 3, respectively. The N(E)-spectrum in Fig.l demonstrates how the Monte Carlo simulation describes the energy loss spectrum due to plasmon excitation near at primary energy, general shape of energy distributions of backscattered electrons and secondary electrons.

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10

Nahar, Sultana N., i Bobby Antony. "Positron Scattering from Atoms and Molecules". Atoms 8, nr 2 (15.06.2020): 29. http://dx.doi.org/10.3390/atoms8020029.

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A review on the positron scattering from atoms and molecules is presented in this article. The focus on positron scattering studies is on the rise due to their presence in various fields and application of cross section data in such environments. Positron scattering is usually investigated using theoretical approaches that are similar to those for electron scattering, being its anti-particle. However, most experimental or theoretical studies are limited to the investigation of electron and positron scattering from inert gases, single electron systems and simple or symmetric molecules. Optical potential and polarized orbital approaches are the widely used methods for investigating positron scattering from atoms. Close coupling approach has also been used for scattering from atoms, but for lighter targets with low energy projectiles. The theoretical approaches have been quite successful in predicting cross sections and agree reasonably well with experimental measurements. The comparison is generally good for electrons for both elastic and inelastic scatterings cross sections, while spin polarization has been critical due to its sensitive perturbing interaction. Positron scattering cross sections show relatively less features than that of electron scattering. The features of positron impact elastic scattering have been consistent with experiment, while total cross section requires significant improvement. For scattering from molecules, utilization of both spherical complex optical potential and R-matrix methods have proved to be efficient in predicting cross sections in their respective energy ranges. The results obtained shows reasonable comparison with most of the existing data, wherever available. In the present article we illustrate these findings with a list of comprehensive references to data sources, albeit not exhaustive.

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11

Wang, Zan, Lei Quan i Yi Wu Ruan. "Simulation of Electron Transport in Silicon using Monte Carlo Method". Advanced Materials Research 284-286 (lipiec 2011): 871–74. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.871.

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A Monte Carlo method is employed to investigate the properties of electron transport with considerations of electron-phonon scattering including intervalley scattering and intravalley scattering. Under different electric fields, the coupling relations between electrons and phonons are studied, and the behaviors of absorbing and releasing phonons from electrons are also analyzed. The results show the scattering events of absorbing phonons from electrons decrease with the increasing simulation time. At the same temperature, the mean free path of electron increases initially and then decreases with the increasing electric field intensity, and finally approaches an asymptotic value.

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12

Hadi, Mohammed Y., i Ammar A. Al-Sa’ad. "Study Magnetic Electron Scattering Form Factor of Magnesium 24Mg". NeuroQuantology 20, nr 4 (18.05.2022): 443–53. http://dx.doi.org/10.14704/nq.2022.20.4.nq22257.

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The magnetic form factors (ML) of inelastic electron scattering of magnesium nuclei 24Mg were studied computationally using Oxbash code. The energy levels of this nucleus were calculated through the shell model and using the model space (ZBM, PSD,SPSDPF and SD). For SD used two novel USD-type Hamiltonians, USDC and USDI, as well as modifications to these interactions, USDCm and USDIm. All the calculated values that were studied were compared with the available practical data, and it was also based on the data of the NNDC website. This study showed agreement between the calculated results and the experimental data after changing the values of g-factors where they were (𝑔𝑙 𝑝= 1.060 and 𝑔𝑙 𝑛= -0.060).

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13

Gakh, G. I., M. I. Konchatnij i N. P. Merenkov. "Model-Independent Radiative Corrections to Elastic Proton-Electron Scattering". Ukrainian Journal of Physics 62, nr 1 (styczeń 2017): 3–11. http://dx.doi.org/10.15407/ujpe62.01.0003.

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14

Wang, Heng, Kang Du, Ruibin Liu, Xinhai Dai, Wending Zhang, Soo Jin Chua i Ting Mei. "Role of hot electron scattering in epsilon-near-zero optical nonlinearity". Nanophotonics 9, nr 14 (25.07.2020): 4287–93. http://dx.doi.org/10.1515/nanoph-2020-0266.

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AbstractThe physical origin of epsilon-near-zero (ENZ) optical nonlinearity lies in the hot-electron dynamics, in which electron scattering plays an important role. With the damping factor defined by hot electron scattering time, the Drude model could be extended to modeling ENZ optical nonlinearity completely. We proposed a statistical electron scattering model that takes into account the effect of electron distribution in a nonparabolic band and conducted the investigation on indium tin oxide (ITO) with femtosecond-pump continuum-probe experiment. We found that ionized impurity scattering and acoustic phonon scattering are the two major scattering mechanisms, of which the latter had been neglected before. They dominate at low-energy and high-energy electrons, respectively, and are weakened or boosted for high electron temperature, respectively. The electron energy–dependent scattering time contributed from multiple scattering mechanisms shows the electron density–dependent damping factor. The comprehensive understanding of electron scattering in ITO will help to develop a complete model of ENZ optical nonlinearity.

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15

Cheng, S. C., Y. Y. Wang i V. P. Dravid. "The measurements of the elastic-inelastic multiple scattering electron intensity in EELS". Proceedings, annual meeting, Electron Microscopy Society of America 53 (13.08.1995): 300–301. http://dx.doi.org/10.1017/s0424820100137872.

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The Electron energy loss function in the low energy range is determined by collective excitation of valence electrons and charge carriers, i.e. plasmons, as well as interband and intraband excitations. The explicit dependence of the cross-section on the momentum transfer q allows the observation of nonvertical interband transition and a measurement of the dispersion of plasmon excitations. The drawback of the momentum resolved electron spectroscopy is the multiple scattering, which often obscure the single scattering events. Under relatively small scattering angles, both strong elasticinelastic multiple (E-I-M) scattering and elastic scattering events compared to the inelastic scattering have been reported. In order to find out in what momentum range the E-I-M scattering intensity can be ignored in the momentum resolved electron spectroscopy, we have measured the angular dependency of the intensities of the E-I-M scattering electrons Ie+in. The intensities of the elastic scattering electrons Ie as well as of the inelastic scattering electrons Iin were also measured and are presented in this paper together. A simple relationship between Ie and Ie+in is found.

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16

Sen, R., N. Vast i J. Sjakste. "Hot electron relaxation and energy loss rate in silicon: Temperature dependence and main scattering channels". Applied Physics Letters 120, nr 8 (21.02.2022): 082101. http://dx.doi.org/10.1063/5.0082727.

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In this work, we revisit the density functional theory (DFT)-based results for electron–phonon scattering in highly excited silicon. Using the state-of-the-art ab initio methods, we examine the main scattering channels, which contribute to the total electron–phonon scattering rate and the energy loss rate of photoexcited electrons in silicon as well as their temperature dependence. Both temperature dependence and the main scattering channels are shown to strongly differ for the total electron–phonon scattering rate and the energy loss rate of photoexcited electrons. While the total electron–phonon scattering rate increases strongly with temperature, the temperature dependence of the energy loss rate is negligible. Also, while acoustic phonons dominate the total electron–phonon scattering rate at 300 K, the main contribution to the energy loss rate comes from optical modes. In this respect, DFT-based results are found to disagree with conclusions of Fischetti et al. [Appl. Phys. Lett. 114, 222104 (2019)]. We explain the origin of this discrepancy, which is mainly due to differences in the description of the electron–phonon scattering channels associated with transverse phonons.

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17

Vergados, J. D., Ch C. Moustakidis, Yeuk-Kwan E. Cheung, H. Ejiri, Yeongduk Kim i Jeong-Yeon Lee. "Light WIMP Searches Involving Electron Scattering". Advances in High Energy Physics 2018 (2018): 1–14. http://dx.doi.org/10.1155/2018/6257198.

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In the present work we examine the possibility of detecting electrons in light dark matter searches. These detectors are considered to be the most appropriate for detecting dark matter particles with a mass in the MeV region. We analyze theoretically some key issues involved in such detection. More specifically we consider a particle model involving WIMPs interacting with fermions via Z-exchange. We find that for WIMPs with mass in the electron mass range the cross section for WIMP-atomic electron scattering is affected by the electron binding. For WIMPs more than 20 times heavier than the electron, the binding affects the kinematics very little. As a result, many electrons can be ejected with energy which increases linearly with the WIMP mass, but the cross section is somewhat reduced depending on the bound state wave function employed. On the other hand for lighter WIMPs, the effect of binding is dramatic. More specifically at most 10 electrons, namely, those with binding energy below 10 eV, become available even in the case of WIMPs with a mass as large as 20 times the electron mass. Even fewer electrons contribute if the WIMPs are lighter. The cross section is, however, substantially enhanced by the Fermi function corrections, which become more important at low energies of the outgoing electrons. Thus events of 0.5–2.5 per kg-y become possible.

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18

Maas, J. van der, R. Huguenin i V. A. Gasparov. "Electron-electron scattering in tungsten". Journal of Physics F: Metal Physics 15, nr 11 (listopad 1985): L271—L278. http://dx.doi.org/10.1088/0305-4608/15/11/006.

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19

Zhao, J., J. Bass, W. P. Pratt i P. A. Schroeder. "Electron-electron scattering in Li". Journal of Physics F: Metal Physics 16, nr 11 (listopad 1986): L271—L274. http://dx.doi.org/10.1088/0305-4608/16/11/003.

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20

Thomson, M. G. R. "Electron–electron scattering in microcolumns". Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 12, nr 6 (listopad 1994): 3498. http://dx.doi.org/10.1116/1.587458.

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21

Jonas, P., P. Schattschneider i P. Pongratz. "Removal of Bragg-Compton Channel Coupling in Electron Compton Scattering". Proceedings, annual meeting, Electron Microscopy Society of America 48, nr 2 (12.08.1990): 24–25. http://dx.doi.org/10.1017/s0424820100133710.

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Electron Compton scattering is inelastic scattering of fast electrons at large angles off core or valence electrons. The energy of the scattered electron is increasingly lowered with scattering angle; the energy distribution can be shown to be an image of the electron momentum density distribution in the ground state.The most dominant problem in ECOSS (Electron Compton Scattering from Solids), is the Bragg-Compton channel coupling. Bragg scattered electrons in the specimen act as new sources for Compton scattering. Since these Compton events correspond to various scattering angles a number of Compton profiles with different maximum and width are superimposed in a measurement.The MethodWe may write the total measured intensity M at a particular energy loss E as a linear combination of coupled Bragg-Compton events. In the case of a systematic row reflection with i excited beams it is always possible to choose n = 2 * (i - 1) angles such that the system of linear equations can be solved with respect to I.

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22

Lee, Geon-Woo, Young-Bok Lee, Dong-Hyun Baek, Jung-Gon Kim i Ho-Seob Kim. "Raman Scattering Study on the Influence of E-Beam Bombardment on Si Electron Lens". Molecules 26, nr 9 (8.05.2021): 2766. http://dx.doi.org/10.3390/molecules26092766.

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Microcolumns have a stacked structure composed of an electron emitter, electron lens (source lens), einzel lens, and a deflector manufactured using a micro electro-mechanical system process. The electrons emitted from the tungsten field emitter mostly pass through the aperture holes. However, other electrons fail to pass through because of collisions around the aperture hole. We used Raman scattering measurements and X-ray photoelectron spectroscopy analyses to investigate the influence of electron beam bombardment on a Si electron lens irradiated by acceleration voltages of 0, 20, and 30 keV. We confirmed that the crystallinity was degraded, and carbon-related contamination was detected at the surface and edge of the aperture hole of the Si electron lens after electron bombardment for 24 h. Carbon-related contamination on the surface of the Si electron lens was verified by analyzing the Raman spectra of the carbon-deposited Si substrate using DC sputtering and a carbon rod sample. We report the crystallinity and the origin of the carbon-related contamination of electron Si lenses after electron beam bombardment by non-destructive Raman scattering and XPS analysis methods.

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23

Rigler, Mark, i William Longo. "High Voltage Scanning Electron Microscopy Theory and Applications". Microscopy Today 2, nr 5 (sierpień 1994): 12–13. http://dx.doi.org/10.1017/s1551929500066256.

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A variety of energy emissions occur as a result of primary beam interaction with the specimen surface. Secondary electrons, x-rays, visible photons, near IR photons, and Auger electrons are emitted during inelastic scattering of electrons. Backscattered electrons (BSE) are emitted during elastic scattering of primary electrons. Backscattered electrons are those electrons which pass through the electron cloud of an atom and change direction without much energy loss. BSEs may diffuse into the sample or may escape from the sample surface. In practice, the primary electron beam penetrates deeply into low Z (atomic number) materials and produces few BSEs while high Z materials retard primary beam penetration and emit large numbers of BSEs. According to Murata et al., the higher the atomic number, the smaller the mean free path between electron scattering events (i.e. 528 Å for Al vs. 50 Å for Au at 30 KeV) and the higher the probability of scattering.

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24

Wight, S. A., i C. J. Zeissler. "Phosphor Imaging Plate Measurement of Electron Scattering in the Environmental Scanning Electron Micrsoscope". Microscopy and Microanalysis 6, S2 (sierpień 2000): 798–99. http://dx.doi.org/10.1017/s1431927600036485.

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In this work, phosphor imaging plate technology is applied to measure electron scattering directly in the environmental scanning electron microscope (ESEM) specimen chamber. The scattering of electrons from the primary electron beam, under relatively high-pressure conditions (266 Pa) in the ESEM sample chamber, degrades the analytical accuracy of elemental analysis. The degree of this degradation is poorly known. To date, attempts to measure experimentally the spatial distribution of the scattered electrons have been limited to observing secondary effects such as the intensity of x-rays produced from copper targets positioned at various distances from the primary electron beam interaction point. A more accurate distribution of the scattered electron intensity can be obtained from a direct measurement of both the scattered and unscattered electrons over a large area with single electron sensitivity. Improvements to the accuracy of Monte Carlo models of the scattering process will be made possible by the direct measurement data.

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25

Wang, Z. L. "Coupled thermal diffuse-atomic inner shell scattering in electron diffraction". Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 994–95. http://dx.doi.org/10.1017/s042482010017270x.

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In electron diffraction patterns, diffuse scattering at high angles is primarily generated by phonon, or thermal diffuse, scattering (TDS). Techniques were introduced to acquire the electron energy-loss spectra (EELS) of high-angle thermal-diffuse-scattered electrons (TDS-EELS) in a transmission electron microscope (TEM). With regards to the scattering mechanism, the TDS-EELS core ionization edge intensity was believed to be generated primarily by TDS - single electron, double-inelastic electron scattering processes. It was concluded from experimental data that the signal from coupled phonon - atomic inner shell excitations is stronger than that from atomic inner shell excitation alone. A formal dynamical theory is presented in this paper to illustrate the theoretical basis of the experimental observations. The theory can be applied to calculate the diffraction patterns of inelastically double-scattered electrons and the signal intensity observed in TDS-EELS.TDS is actually a statistically averaged, quasi-elastic scattering of the electrons by the crystal lattice of different thermal vibration configurations.

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26

Bezuglyi, E. V., N. G. Burma, A. L. Gaiduk, I. G. Kolobov, V. D. Fil’, V. V. Khotkevich i H. van Kempen. "Electron sound in aluminum. Electron–electron scattering". Low Temperature Physics 24, nr 3 (marzec 1998): 169–81. http://dx.doi.org/10.1063/1.593567.

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27

Artamonov, O. M., S. N. Samarin i J. F. Williams. "Electron screening and electron–electron scattering mechanisms". Journal of Electron Spectroscopy and Related Phenomena 191 (grudzień 2013): 79–85. http://dx.doi.org/10.1016/j.elspec.2013.11.005.

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28

ZHANG, C. "EFFECT OF INELASTIC SCATTERING OF HOT ELECTRONS ON THERMIONIC COOLING IN A SINGLE-BARRIER STRUCTURE". International Journal of Modern Physics B 14, nr 14 (10.06.2000): 1451–57. http://dx.doi.org/10.1142/s0217979200001503.

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One of the important problems in thermionics using layered structures is the inelastic scattering of hot electrons in the electrodes and in the barrier region. Scattering in these systems is mainly via the electron–phonon interaction, or indirectly via the electron–electron interaction. In semiconductor heterostructures at room temperature, the LO-phonon plays a crucial role in thermalising electrons. In this work we study the effect of electron–phonon scattering on thermionic cooling in a single-barrier structure. Because of the asymmetry of the barrier under a bias, a larger fraction of the total energy loss will be dissipated in the hot electrode. As a result, we find that the theoretical thermal efficiency can increase due to limited electron–phonon scattering.

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29

Milliman, T. E., J. P. Connelly, J. H. Heisenberg, F. W. Hersman, J. E. Wise i C. N. Papanicolas. "Electron scattering fromMo92". Physical Review C 41, nr 6 (1.06.1990): 2586–604. http://dx.doi.org/10.1103/physrevc.41.2586.

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30

Glickman, J. P., W. Bertozzi, T. N. Buti, S. Dixit, F. W. Hersman, C. E. Hyde-Wright, M. V. Hynes i in. "Electron scattering fromBe9". Physical Review C 43, nr 4 (1.04.1991): 1740–57. http://dx.doi.org/10.1103/physrevc.43.1740.

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31

Cichocki, A., J. Dubach, R. S. Hicks, G. A. Peterson, C. W. de Jager, H. de Vries, N. Kalantar-Nayestanaki i T. Sato. "Electron scattering fromB10". Physical Review C 51, nr 5 (1.05.1995): 2406–26. http://dx.doi.org/10.1103/physrevc.51.2406.

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32

Williams, I. D. "Electron-ion scattering". Reports on Progress in Physics 62, nr 10 (28.09.1999): 1431–69. http://dx.doi.org/10.1088/0034-4885/62/10/202.

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33

Kleinpoppen, H. "Electron-scattering experiments". Nature 330, nr 6143 (listopad 1987): 20. http://dx.doi.org/10.1038/330020a0.

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34

RÄDEL, GABY, i ROLF BEYER. "NEUTRINO ELECTRON SCATTERING". Modern Physics Letters A 08, nr 12 (20.04.1993): 1067–88. http://dx.doi.org/10.1142/s0217732393002567.

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This article reviews experimental results obtained from studies of neutrino electron scattering and shows in particular the important input from these experiments to the improved knowledge of weak neutral currents and the confirmation of the Standard Model at tree level. Special emphasis is put on recent high precision νe-experiments, whose results on electroweak parameters allow, in combination with precise results obtained at higher Q2, a test of the Standard Model at the level of higher order corrections.

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35

Sick, I. "Inclusive electron scattering". Progress in Particle and Nuclear Physics 34 (styczeń 1995): 323–43. http://dx.doi.org/10.1016/0146-6410(95)00029-i.

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36

Vilain, Pierre. "Neutrino electron scattering". Nuclear Physics B - Proceedings Supplements 19 (kwiecień 1991): 306–15. http://dx.doi.org/10.1016/0920-5632(91)90210-6.

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37

VITKALOV, SERGEY, JING QIAO ZHANG, A. A. BYKOV i A. I. TOROPOV. "NONLINEAR TRANSPORT OF 2D ELECTRONS IN MAGNETIC FIELD". International Journal of Modern Physics B 23, nr 12n13 (20.05.2009): 2689–92. http://dx.doi.org/10.1142/s0217979209062190.

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Electric field induced, spectacular reduction of longitudinal resistivity of two dimensional electrons placed in strong magnetic field is studied in broad range of temperatures. The data are in good agreement with theory, considering the strong nonlinearity of the resistivity as result of non-uniform spectral diffusion of 2D electrons induced by the electric field. Comparison with the theory gives inelastic scattering time τin of the 2D electrons. In temperature range T = 2 - 20 K for overlapping Landau levels, the inelastic scattering rate 1/τin is found to be proportional to T2, indicating dominant contribution of the electron-electron interaction to the inelastic electron relaxation. At strong magnetic field, at which Landau levels are well separated, the inelastic scattering rate is proportional to T3 at high temperatures. We suggest the electron-phonon scattering as the dominant mechanism of the inelastic electron relaxation in this regime. At low temperature and separated Landau levels an additional regime of the inelastic electron relaxation is observed: τin ~ T-1.26.

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38

Yamashita, H., i A. Kidera. "Aspherical Scattering Amplitudes for Electron Scattering". Seibutsu Butsuri 39, supplement (1999): S173. http://dx.doi.org/10.2142/biophys.39.s173_2.

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39

VALERI, SERGIO. "MODULATED ELECTRON EMISSION". Surface Review and Letters 04, nr 05 (październik 1997): 937–45. http://dx.doi.org/10.1142/s0218625x97001085.

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Basic aspects of energetic electron–atom scattering suffered by incident (primary) and/or excident (Auger, backscattered) electrons during propagation in (at least locally) ordered solids are reviewed. Scattering interference results in the dependence of total or partial electron yield on the incidence and/or takeoff angle. This paper is focused on processes experienced by incident electrons. The incident wave amplitude is spatially modulated within the solid by the interference of the unscattered wave portion and the wave portion scattered at the atomic sites. Interplay between forward focusing and multiple-scattering induced defocusing processes determines the profile of the primary electron intensity anisotropy along atomic chains. This anisotropy profile has been found to be a key parameter to interpret and to model modulated electron emission results. Examples are shown. They include (i) structural characterization of multilayer epitaxial growth, and (ii) study of the very early stage of III–V semiconductors amorphyzation by ion bombardment.

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40

Batson, P. E. "Symmetry-selected electron energy loss scattering". Proceedings, annual meeting, Electron Microscopy Society of America 51 (1.08.1993): 574–75. http://dx.doi.org/10.1017/s0424820100148708.

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The differential scattering cross section for EELS has long been described within the Born approximation: where v is the incident electron velocity, | ϕ0 > and | ϕn > are the initial and final one electron specimen states, and the sum is over the specimen electrons. This expression is suited to plane wave scattering where we have one well-defined momentum transfer given by q. We obtain equation by expanding the swift electron coulomb interaction in a Fourier series and picking one momentum transfer. This is not very useful for scattering in the STEM, because we must sum coherently over many plane wave states to make a small probe. This produces many cross terms in equation above, some of which may exactly cancel. Thus, the plane wave formulation can obscure a simple result by separating the scattering in a non-physical way.

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41

BARRANCO, J., A. BOLAÑOS, E. A. GARCÉS, O. G. MIRANDA i T. I. RASHBA. "TENSORIAL NSI AND UNPARTICLE PHYSICS IN NEUTRINO SCATTERING". International Journal of Modern Physics A 27, nr 25 (10.10.2012): 1250147. http://dx.doi.org/10.1142/s0217751x12501473.

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We have analyzed the electron antineutrino scattering off electrons and the electron antineutrino–nuclei coherent scattering in order to obtain constraints on tensorial couplings. We have studied the formalism of nonstandard interactions (NSI) as well as the case of unparticle physics. For our analysis we have focused on the recent TEXONO collaboration results and we have obtained current constraints to possible electron antineutrino–electron tensorial couplings in both new physics formalisms. The possibility of measuring electron antineutrino–nucleus coherent scattering for the first time and its potential to further constrain electron antineutrino–quark tensorial couplings is also discussed.

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42

GAUVIN, RAYNALD, i DOMININIQUE DROUIN. "MULTIFRACTAL DESCRIPTION OF ELECTRON SCATTERING IN SOLIDS". Fractals 02, nr 02 (czerwiec 1994): 229–32. http://dx.doi.org/10.1142/s0218348x94000223.

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The fundamental understanding of electron scattering is of critical importance concerning Scanning Electron Microscopy and for electron beam lithography. In these process of great technological importance, it is important to know the volume of diffusion of electrons to define the resolution. Also, it is important to know the rate of energy loss, the number of backscattered and secondary electrons created, their angular distribution, …. All these quantities depend on the shape of the trajectories of the electrons in the solid when they diffuse into it. The use of fractal geometry to describe such trajectories have been previously studied by Gauvin and Drouin1,2 from trajectories computed by Monte Carlo simulations. In these studies, the multifractal behavior of the shape of electron trajectories in solids have also been reported but no explanations have been given to describe the shape of the corresponding f(α) curves. In this paper, we present such explanation for the f(α) curves computed from the electron trajectories simulated in C and in Au with an initial energy of 30 keV (see Gauvin and Drouin2).

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43

Amusia, M. Ya, i A. S. Baltenkov. "Elastic scattering of slow electrons by carbon nanotubes". Journal of Physics B: Atomic, Molecular and Optical Physics 54, nr 24 (22.12.2021): 245201. http://dx.doi.org/10.1088/1361-6455/ac3c94.

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Abstract In this paper we calculate the cross sections for elastic scattering of slow electrons by carbon nanotubes. The corresponding electron–nanotube interaction is substituted by a zero-thickness cylindrical potential that neglects the atomic structure of real nanotubes, thus limiting the range of applicability of our approach to sufficiently low incoming electron energies. The strength of the potential is chosen to be the same as was used in describing the scattering of electrons by fullerene C60. We present results for total and partial electron scattering cross sections as well as their respective angular distributions, all with account of the five lowest angular momenta contributions. In the calculations we assumed that the incoming electron moves perpendicular to the nanotube axis, since an incoming electron along the axis moves freely.

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44

Briones, J., H. C. Schneider i B. Rethfeld. "Monte Carlo simulation of ultrafast nonequilibrium spin and charge transport in iron". Journal of Physics Communications 6, nr 3 (1.03.2022): 035001. http://dx.doi.org/10.1088/2399-6528/ac5873.

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Abstract Spin transport and spin dynamics after femtosecond laser pulse irradiation of iron (Fe) are studied using a kinetic Monte Carlo model. This model simulates spin dependent dynamics by taking into account two interaction processes during nonequilibrium: elastic electron–lattice scattering, where only the direction of the excited electrons changes, and inelastic electron–electron scattering processes, where secondary electrons are generated. An analysis of the spin dependent particle kinetics inside the material shows that a smaller elastic scattering time leads to a larger spatial spread of electrons in the material, whereas generation of secondary electrons extends the time span for superdiffusive transport and increases the spin current density.

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45

YANG, Y. H. "MAGNETIC SCATTERING EFFECTS IN A QUASI-TWO-DIMENSIONAL DISORDERED ELECTRON SYSTEM". Modern Physics Letters B 14, nr 27n28 (10.12.2000): 995–1000. http://dx.doi.org/10.1142/s0217984900001257.

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The weak-localization correction to the conductivity for a quasi-two-dimensional disordered electron system is calculated in the presence of magnetic impurity scatterings. The analytical result is obtained as a function of the magnetic scattering time, and the interesting magnetic-scattering-dependent crossover behavior from 3D to 2D is discussed.

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46

Bronold, F. X., i H. Fehske. "Invariant embedding approach to secondary electron emission from metals". Journal of Applied Physics 131, nr 11 (21.03.2022): 113302. http://dx.doi.org/10.1063/5.0082468.

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Based on an invariant embedding principle for the backscattering function, we calculate the electron emission yield for metal surfaces at very low electron impact energies. Solving the embedding equation within a quasi-isotropic approximation and using the effective mass model for the solid experimental data are fairly well reproduced provided (i) incoherent scattering on ion cores is allowed to contribute to the scattering cascades inside the solid and (ii) the transmission through the surface potential takes into account Bragg gaps due to coherent scattering on crystal planes parallel to the surface as well as randomization of the electron’s lateral momentum due to elastic scattering on surface defects. Our results suggest that in order to get secondary electrons out of metals, the large energy loss due to inelastic electron–electron scattering has to be compensated for by incoherent elastic electron–ion core scattering, irrespective of the crystallinity of the sample.

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47

FRAMPTON, PAUL H. "BILEPTON RESONANCE IN ELECTRON–ELECTRON SCATTERING". International Journal of Modern Physics A 15, nr 16 (30.06.2000): 2455–60. http://dx.doi.org/10.1142/s0217751x00002524.

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Theoretical background for bileptonic gauge bosons is reviewed — both the SU(15) GUT model and the 3-3-1 model. Mass limits on bileptons are discussed coming from e+e- scattering, polarized muon decay and muonium–antimuonium conversion. Discovery in e-e- at a linear collider at low energy (100 GeV) and high luminosity (1033/cm2/s) is emphasized.

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48

Shibata, S., F. Hirota i T. Shioda. "Molecular electron density from electron scattering". Journal of Molecular Structure 485-486 (sierpień 1999): 1–11. http://dx.doi.org/10.1016/s0022-2860(99)00178-7.

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Wiser, N. "Electron-electron scattering resistivity of lithium". Journal of Physics: Condensed Matter 4, nr 7 (17.02.1992): L105—L107. http://dx.doi.org/10.1088/0953-8984/4/7/001.

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50

Sanborn, B. A. "Total Dielectric Function Approach to the Electron Boltzmann Equation for Scattering from a Two-Dimensional Coupled Mode System". VLSI Design 6, nr 1-4 (1.01.1998): 69–72. http://dx.doi.org/10.1155/1998/70276.

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The nonequilibrium total dielectric function lends itself to a simple and general method for calculating the inelastic collision term in the electron Boltzmann equation for scattering from a coupled mode system. Useful applications include scattering from plasmon-polar phonon hybrid modes in modulation doped semiconductor structures. This paper presents numerical methods for including inelastic scattering at momentum-dependent hybrid phonon frequencies in the low-field Boltzmann equation for two-dimensional electrons coupled to bulk phonons. Results for electron mobility in GaAs show that the influence of mode coupling and dynamical screening on electron scattering from polar optical phonons is stronger for two dimensional electrons than was previously found for the three dimensional case.

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