Littérature scientifique sur le sujet « Electron scattering calculations »

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Articles de revues sur le sujet "Electron scattering calculations"

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Berrington, M. J., D. V. Fursa, I. Bray, R. P. McEachran, and A. D. Stauffer. "Calculations of electron scattering from cadmium." Journal of Physics: Conference Series 388, no. 4 (2012): 042026. http://dx.doi.org/10.1088/1742-6596/388/4/042026.

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McCarthy, IE, and X. Zhang. "Distorted-wave Born Approximation for the Ionisation of Hydrogen by Electrons." Australian Journal of Physics 43, no. 3 (1990): 291. http://dx.doi.org/10.1071/ph900291.

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Matrix elements for ionisation play an important part in electron-atom scattering calculations. Two methods for describing ionisation that can be incorporated into a scattering calculation are tested here against coplanar asymmetric experimental differential cross sections at 150 and 250 eV. They are the distorted-wave Born approximation and the coupled pseudostates method. A method that incorporates the exact boundary condition for three charged bodies describes the data significantly better and shows an important direction for improvement of scattering calculations.
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Mirteimour, M. m., and Mina Aliyeva. "Study of the structure of atomics by the method of electron scattering in the distorted-wave approximation: Atomic energy." Turkish Computational and Theoretical Chemistry 9, no. 3 (2024): 38–44. https://doi.org/10.33435/tcandtc.1451290.

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Using distorted-wave approximation obtained the differential cross-section (DCS) of elastic scattering at energy of 80 eV of electrons on 49In, 31Ga, 34Se and 70Yb atoms, and calculated accordingly on the proposed mathematical method. The electron density distribution in the atom is chosen as a function calculated in the Dirac-Hartree-Fock-Slater approximation, which is a superposition of the spherically symmetric Yukawa potential. In addition, the DCSs were calculated for the electron density in the 49 In and 20 Ca atoms expressed as a three-parameter Fermi function at incident electron energ
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William McCurdy, C. "Low-energy Electron Scattering from Polyatomic Molecules: The Role of Electron Correlation." Australian Journal of Physics 45, no. 3 (1992): 337. http://dx.doi.org/10.1071/ph920337.

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Until recently the principal barrier to the accurate theoretical description of electronic collisions with polyatomic molecules was the problem of scattering by a nonlocal potential which is arbitrarily asymmetric. The last five or six years have seen the development of numerical techniques capable of solving the potential scattering problem, and the first applications of methods for treating many-body aspects of collisions of electrons with polyatomic molecules are beginning to appear in the literature. We describe the complex Kohn method and the use, in scattering calculations, of methods fo
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Bettega, Márcio H. F. "Low-Energy Electron Scattering by CS2 Molecules." Australian Journal of Physics 53, no. 6 (2000): 785. http://dx.doi.org/10.1071/ph00083.

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We report the integral elastic cross section for low-energy electron scattering by CS2 molecules. To perform our calculations we used the Schwinger multichannel method with pseudopotentials.We have found, in a static-exchange calculation, a shape resonance around 1 eV that belongs to the Π u symmetry.With the inclusion of polarisation effects only in that symmetry, we show that the resonance becomes a bound state. This result is in agreement with other results available in the literature.
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Xu, Zhi Zhong, and D. Morris. "Electron–electron inter-subband scattering in GaAs quantum wells." Canadian Journal of Physics 74, S1 (1996): 252–55. http://dx.doi.org/10.1139/p96-869.

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The role of electron–electron scattering in the dynamics of inter-subband relaxation in GaAs quantum wells is investigated theoretically. The scattering rate is calculated using the Fermi golden rule, as a function of the carrier densities. The dependence of the inter-subband relaxation time on the quantum-well width is also investigated. Calculations are performed for multiple quantum-well structures with well widths varying from 80 to 240 Å (1 Å = 10−10 m). The hot electron distribution and the subband occupation function are taken into account in these calculations. Results show that the el
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Qiao, S., A. Kimura, A. Harasawa, and A. Kakizaki. "A new compact spin- and angle-resolving photoelectron spectrometer with a high efficiency." Journal of Synchrotron Radiation 5, no. 3 (1998): 741–43. http://dx.doi.org/10.1107/s0909049597019067.

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A portable spin- and angle-resolving photoelectron spectrometer has been constructed, equipped with a newly developed compact retarding-potential Mott-scattering electron spin polarimeter with an efficiency of 1.9 × 10−4 for a gold target. Based on Monte Carlo calculations for the spin-dependent electron-scattering process and electron ray-tracing calculations, a novel design of the retarding-field electron optics with 0.59 sr collection solid angle for scattered electrons has been accomplished. Utilizing this spectrometer, the spin- and angle-resolved photoelectron spectra have been measured
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Müller, D. A., B. Edwards, E. J. Kirkland, and J. Silcox. "Detailed Calculations of Thermal Diffuse Scattering." Microscopy and Microanalysis 3, S2 (1997): 1153–54. http://dx.doi.org/10.1017/s1431927600012654.

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Convergent beam electron diffraction (CBED) produces a diffraction pattern from a single point on the specimen using a focused probe in the scanning transmission electron microscope (STEM). Because the incident wavefunction is a focused probe, each diffraction spot is enlarged to a disk the size of the objective aperture. Thermal vibration in the specimen reduces the intensity of the diffraction disks and introduces scattering in between the disk. This normally forbidden scattering between the diffraction disks is referred to as thermal diffuse scattering (TDS). The effects are most pronounced
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Amusia, M. Ya, and A. S. Baltenkov. "Elastic scattering of slow electrons by carbon nanotubes." Journal of Physics B: Atomic, Molecular and Optical Physics 54, no. 24 (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
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Fabrikant, I. I. "Semiempirical calculations of inelastic electron-methylchloride scattering." Journal of Physics B: Atomic, Molecular and Optical Physics 27, no. 18 (1994): 4325–36. http://dx.doi.org/10.1088/0953-4075/27/18/026.

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Thèses sur le sujet "Electron scattering calculations"

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Hamilton, J. R. "R-matrix calculations modelling electron-molecule scattering and system dynamics." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10041913/.

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This thesis presents several theoretical investigations into electron scattering with complex molecular systems from interstellar and atmospheric systems to systems for application in industrial plasma etching of silicon surfaces. Through these investigations new methods for calculating dissociation branching ratios for several electron scattering processes, viz. electron impact-dissociative ionisation, -neutral dissociation and -dissociative attachment, are developed and tested. This thesis also presents computational schemes for calculation of high energy electron molecule scattering cross s
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Huang, Yunfei. "Front-form calculations of exchange currents in elastic electron-deuteron scattering." Diss., University of Iowa, 2008. https://ir.uiowa.edu/etd/217.

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Electron-deuteron scattering is an ideal tool for studying nuclear structure and nuclear forces. The elastic deuteron current matrix elements have been calculated using a Poincaré invariant quantum model with a light-front kinematic symmetry. The impulse approximation violates the Poincarécovariance and current conservation for the interacting system and two-body currents are required to satisfy these constraints. A model two-body current that has a structure motivated by "pair'' currents was constructed in this work. It appears naturally in quantum field theory. The Argonne V18 potential was
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Thiagarajan, Kannan. "Tight-binding calculations of electron scattering rates in semiconducting zigzag carbon nanotubes." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13162.

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The technological interest in a material depends very much on its electrical, magnetic, optical and/or mechanical properties. In carbon nanotubes the atoms form a cylindrical structure with a diameter of the order 1 nm, but the nanotubes can be up to several hundred micrometers in length. This makes carbon nanotubes a remarkable model for one-dimensional systems. A lot of efforts have been dedicated to manufacturing carbon nanotubes, which is expected to be the material for the next generation of devices. Despite all the attention that carbon nanotubes have received from the scientific communi
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Alahmade, Walaa M. "ANALYTICAL AND MONTE CARLO CALCULATIONS FOR ELASTIC ELECTRON-TRITON SCATTERING AT JEFFERSON LABORATORY." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1429465640.

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Ross, William Charles. "Monte Carlo calculations of inner shell ionization profiles and the secondary electron background in electron spectroscopy." Thesis, University of York, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298446.

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SMITH, MARK SCOTT. "THE FORMULATION OF THE STREAMING RAY METHOD FOR ELECTRON TRANSPORT CALCULATIONS IN TWO DIMENSIONS." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184222.

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In this work, the method of streaming rays have been expanded to two spatial dimensions (three phase space dimensions, x, y, and s) and was used as a basis for the development of the electron transport computer code SR2D. The streaming ray algorithm is an Eulerian-Lagrangian hybrid. Electrons are followed as they traverse the medium along specified streaming rays. Fluxes, however, are computed at the centers of the fixed cells. The development of the SR2D code required the specification of a Lagrangian streaming ray network overlaying a three dimensional Eulerian grid. In contrast to its one d
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Paglia, Gianluca. "Determination of the structure of y-alumina using empirical and first principle calculations combined with supporting experiments." Thesis, Curtin University, 2004. http://hdl.handle.net/20.500.11937/2341.

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Aluminas have had some form of chemical and industrial use throughout history. For little over a century corundum (α-Al2O3) has been the most widely used and known of the aluminas. The emerging metastable aluminas, including the γ, δ, η, θ, κ, β, and χ polymorphs, have been growing in importance. In particular, γ-Al2O3 has received wide attention, with established use as a catalyst and catalyst support, and growing application in wear abrasives, structural composites, and as part of burner systems in miniature power supplies. It is also growing in importance as part of the feedstock for alumin
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Paglia, Gianluca. "Determination of the structure of y-alumina using empirical and first principle calculations combined with supporting experiments." Curtin University of Technology, Department of Applied Physics & Department of Applied Chemistry, 2004. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14992.

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Aluminas have had some form of chemical and industrial use throughout history. For little over a century corundum (α-Al2O3) has been the most widely used and known of the aluminas. The emerging metastable aluminas, including the γ, δ, η, θ, κ, β, and χ polymorphs, have been growing in importance. In particular, γ-Al2O3 has received wide attention, with established use as a catalyst and catalyst support, and growing application in wear abrasives, structural composites, and as part of burner systems in miniature power supplies. It is also growing in importance as part of the feedstock for alumin
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Wu, Huayou. "Convergent close-coupling calculations of positron-helium collisions." Thesis, Wu, Huayou (2004) Convergent close-coupling calculations of positron-helium collisions. PhD thesis, Murdoch University, 2004. https://researchrepository.murdoch.edu.au/id/eprint/416/.

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The Convergent Close Coupling (CCC) method is applied, for the first time, to the scattering of positrons on helium. The helium target wave functions are obtained within various configuration interaction (CI) expansions. In the full CI expansion the two electrons are treated equally and thus all electron-electron correlations are taken into account. In the frozen-core (FC) approximation the CI expansion fixes one of the electrons to be described by a pure 1s orbital of He+, while maintaining the required singlet and triplet symmetries. Lastly, the multi-configuration (MC) approximation relaxes
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Wu, Huayou. "Convergent Close-Coupling Calculations of Positron-Helium Collisions." Murdoch University, 2004. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20050107.101745.

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The Convergent Close Coupling (CCC) method is applied, for the first time, to the scattering of positrons on helium. The helium target wave functions are obtained within various configuration interaction (CI) expansions. In the full CI expansion the two electrons are treated equally and thus all electron-electron correlations are taken into account. In the frozen-core (FC) approximation the CI expansion fixes one of the electrons to be described by a pure 1s orbital of He+, while maintaining the required singlet and triplet symmetries. Lastly, the multi-configuration (MC) approximation relaxes
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Livres sur le sujet "Electron scattering calculations"

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Campbell, John, Joey Huston, and Frank Krauss. QCD at Fixed Order: Technology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199652747.003.0003.

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This chapter is devoted to the technology of fixed-order calculations, in particular, in QCD. After a short summary of methods for the efficient evaluation of tree-level scattering amplitudes for multi-particle production, and their integration in phase space, next-to leading order corrections in QCD are addressed. Techniques for the evaluation of loop amplitudes with modern methods, based on the reduction to master integrals, either analytically or with numerical unitarity cut methods, are discussed in some detail. After identifying the problem of infrared divergences and illuminating their t
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Jensen, Daniel Christian. Monte Carlo calculation of electron multiple scattering in thin foils. 1988.

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Boyet, Howard, and Sidney Borowitz. Variational Calculation of the Elastic Scattering of Electrons by Hydrogen Atoms. Creative Media Partners, LLC, 2018.

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Tiwari, Sandip. Semiconductor Physics. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198759867.001.0001.

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A graduate-level text, Semiconductor physics: Principles, theory and nanoscale covers the central topics of the field, together with advanced topics related to the nanoscale and to quantum confinement, and integrates the understanding of important attributes that go beyond the conventional solid-state and statistical expositions. Topics include the behavior of electrons, phonons and photons; the energy and entropic foundations; bandstructures and their calculation; the behavior at surfaces and interfaces, including those of heterostructures and their heterojunctions; deep and shallow point per
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Chapitres de livres sur le sujet "Electron scattering calculations"

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Amusia, Miron, Larissa Chernysheva, and Victor Yarzhemsky. "Electron Scattering: Results of Calculations." In Handbook of Theoretical Atomic Physics. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-24752-1_4.

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Gianturco, F. A., and S. Scialla. "Electron Scattering by Polyatomic Molecules: Recent Advances in Theory and Calculations." In Electron-Molecule Scattering and Photoionization. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1049-5_13.

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Weatherford, C. A., and A. Temkin. "Very Low Energy e-N2 Scattering and Interim Hybrid Calculations of the ∏g Resonance." In Electron-Molecule Scattering and Photoionization. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1049-5_17.

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Baron, Alfred Q. R. "High-Resolution Inelastic X-Ray Scattering II: Scattering Theory, Harmonic Phonons, and Calculations." In Synchrotron Light Sources and Free-Electron Lasers. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-04507-8_52-1.

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Baron, Alfred Q. R. "High-Resolution Inelastic X-Ray Scattering II: Scattering Theory, Harmonic Phonons, and Calculations." In Synchrotron Light Sources and Free-Electron Lasers. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14394-1_52.

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Baron, Alfred Q. R. "High-Resolution Inelastic X-Ray Scattering Part II: Scattering Theory, Harmonic Phonons, and Calculations." In Synchrotron Light Sources and Free-Electron Lasers. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-04507-8_52-2.

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Baron, Alfred Q. R. "High-Resolution Inelastic X-Ray Scattering Part II: Scattering Theory, Harmonic Phonons, and Calculations." In Synchrotron Light Sources and Free-Electron Lasers. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-23201-6_52.

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Sanna, N., and F. A. Gianturco. "Application of Parallel Computers to Electron-Molecule Scattering Calculations." In Photon and Electron Collisions with Atoms and Molecules. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5917-7_16.

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Morgan, Lesley A., Baljit K. Sarpal, and Jonathan Tennyson. "R-Matrix Calculations of Inelastic Electron Scattering by Diatomic Molecules." In Electron Collisions with Molecules, Clusters, and Surfaces. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1489-7_2.

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Golak, J., W. Glöckle, H. Kamada, H. Witała, R. Skibiński, and A. Nogga. "Electron Scattering from Polarized 3He: Results of Full Faddeev Calculations." In Few-Body Problems in Physics ’02. Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6728-1_83.

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Actes de conférences sur le sujet "Electron scattering calculations"

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Rengifo, Rafael, Dale R. McIntyre, and Brian Chambers. "Control of Metal Dusting Using Alloy Selection, Coatings and Inhibitors." In CORROSION 2009. NACE International, 2009. https://doi.org/10.5006/c2009-09153.

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Abstract Metal dusting is a common design and operating constraint on high-temperature hydrocarbon processing. This study reports the results of laboratory investigations in pressurized high-temperature carbon-rich environments simulating operations in syngas production and root cause failure analysis and laboratory analysis simulations in refinery platformer operations. The results rank a variety of stainless steels, Ni-Fe-Cr alloys UNS N08800, N06601, N06025, N06690 and N06693 with respect to metal dusting resistance. Some fundamental aspects of metal dusting are discussed based on diffusion
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Morgan, Lesley A. "R-matrix calculations of electron molecule scattering." In The Sixteenth International Conference on the Physics of Electronic and Atomic Collisions. AIP, 1990. http://dx.doi.org/10.1063/1.39272.

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Slingerland, Philip, Christopher Baird, and Robert Giles. "The effects of various approximations on electron-electron scattering calculations in QCLs." In SPIE OPTO, edited by Laurence P. Sadwick and Créidhe M. M. O'Sullivan. SPIE, 2011. http://dx.doi.org/10.1117/12.873292.

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Elshtwy, Nesrin A., and Fawzi A. Ikraiam. "Electron Mobility Calculations and Scattering Effects in GaN Compound Semiconductor." In 2024 IEEE 4th International Maghreb Meeting of the Conference on Sciences and Techniques of Automatic Control and Computer Engineering (MI-STA). IEEE, 2024. http://dx.doi.org/10.1109/mi-sta61267.2024.10599727.

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Colgan, J. "Benchmark Calculations of Electron-Lithium Scattering for Beam Diagnostics on Tokamaks." In ATOMIC PROCESSES AND PLASMAS: 13th APS Topical Conference on Atomic Processes in Plasmas. AIP, 2002. http://dx.doi.org/10.1063/1.1516305.

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Ivanov, Vadim K., Andrey N. Ipatov, and B. D. Agap'ev. "Correlation effects in many-body calculations for metallic clusters: electron structure, photoabsorption, and elastic electron scattering." In International Workshop on New Approaches to High Tech Materials: Nondestructive Testing and Computer Simulations in Materials Scienc, edited by Alexander I. Melker. SPIE, 1998. http://dx.doi.org/10.1117/12.299576.

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Deuschle, Leonard, Jonathan Backman, Mathieu Luisier, and Jiang Cao. "Ab initio Self-consistent GW Calculations in Non-Equilibrium Devices: Auger Recombination and Electron-Electron Scattering." In 2023 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD). IEEE, 2023. http://dx.doi.org/10.23919/sispad57422.2023.10319647.

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Kann, M. J., and D. K. Ferry. "Role of Electron–Electron Scattering on the Ultrafast Relaxation of Hot Photoexcited Carriers in GaAs." In Picosecond Electronics and Optoelectronics. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/peo.1989.tt153.

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The femtosecond relaxation of photoexcited carriers in semiconductors is investigated by the use of ensemble Monte Carlo calculations coupled with a molecular dynamics approach for the carrier-carrier interaction, to probe various scattering mechanisms and the dynamic screening of hot carriers in semiconductors. The results indicate that the initial rapid relaxation occurs on a time scale of tens of femtoseconds in GaAs decreasing with increasing carrier density.
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Bucksbaum, Philip H., and M. Bashkansky. "Comparing above-threshold Ionization calculations to experiments." In OSA Annual Meeting. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.tus5.

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We present results of strong field calculations of ATI in xenon and krypton by elliptically polarized laser pulses, showing how the spectra and angular distributions depend on polarization, pulse width, intensity, and wavelength. We compare these results to experiments and find that most observations are adequately explained by a simple model in which weakly bound electrons evolve in the presence of a time-varying classical potential. The induced wiggling of the electron wave function results in wave-mechanical interference, producing sharp minima in angular distributions that have been observ
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Abbas, Shaimaa A., Khalid H. Mahdi, and Necla Cakmak. "Form factor calculations for some light nuclei in the framework of electron scattering." In TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES20. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0032946.

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Rapports d'organisations sur le sujet "Electron scattering calculations"

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Cullen, D. E. Program WALKMAN: A code designed to perform electron single collision elastic scattering Monte Carlo calculations. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/10176475.

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Hall and Brown. PR-343-14607-R01 Miniaturized Gas Chromatography and Gas Quality Sensor. Pipeline Research Council International, Inc. (PRCI), 2015. http://dx.doi.org/10.55274/r0010558.

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In natural gas transmission and distribution, many metering stations utilize gas chromatography to ensure the gas complies with the pipeline�s gas quality tariff provisions and to determine the chemical energy content of the gas for billing purposes. It is also used as a check on the operation of gas ultrasonic flowmeters through a calculation of the speed of sound in the gas. Because of limitations on existing gas chromatographs (GC�s), including high installed cost, analysis time, carrier gas consumption and others, there is a desire to consider alternate technologies for natural gas analysi
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Chen, Y. Partonic calculation of the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/826794.

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