Results 251 to 260 of about 13,100,253 (279)

Energy-loss function in the two-pair approximation for the electron liquid

Physical Review B, 1996
The imaginary part of the proper polarizability, Im \ensuremath{\Pi}, arising due to excitations of two electron-hole pairs, is studied in detail for electron systems of arbitrary dimensionality, and taking into account arbitrary degeneracy of the electron bands. This allows an application to semiconductors with degenerate valleys, and to ferromagnetic
, Bachlechner, , Holas, , Böhm, , Schinner   +3 more
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Construction of energy loss function for low-energy electrons in helium

Physica B+C, 1976
Abstract The energy loss function for electrons in the energy range from 50 eV to 1 keV in helium gas has been constructed by considering separately the energy loss in overcoming the ionization threshold, the loss manifested as kinetic energy of secondary electrons and the loss in the discrete state excitations. This has been done by utilizing recent
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Effective energy loss functions of Mo and Ta derived from reflection electron energy loss spectra

Journal of Electron Spectroscopy and Related Phenomena, 2007
Abstract Effective energy loss functions (EELF) of Mo and Ta were derived from reflection electron energy loss spectroscopy (REELS) spectra measured at different primary energies using extended Landau approach. The plasmon behaviors and fine structures of energy losses presented in the energy loss function are analyzed.
T. Chen, Z.M. Zhang, Z.J. Ding, R. Shimizu, K. Goto   +4 more
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On the nonexistence of energy functions for power systems with losses

1988., IEEE International Symposium on Circuits and Systems, 2003
The author demonstrates the nonexistence of a general, global energy function for power systems with losses. He also shows that under certain conditions there does exist a Lyapunov function (defined on a compact set of the state space) which can be incorporated into direct methods for the stability analysis of power systems with losses. >
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Energy Loss Function for Biological Material: Poly (CSP)

Radiation Protection Dosimetry, 1994
Abstract In this paper calculated cross sections are presented for the interaction of electrons with poly(CSP), a single-stranded chain that contains one cytosine sugar phosphate unit in the elementary cell. To model a single strand of helical DNA (e.g.
A.Y.C. Fung, M. Zaider
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Energy loss functions for electrons and protons in planetary gases

Journal of Geophysical Research, 1968
Energy loss functions for protons and electrons in atomic and molecular gases and various metals, noting application to planetary atmospheres ...
A. E. S. Green, L. R. Peterson
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Obtaining the loss function from angle resolved electron energy loss spectra

2009
In this communication we show results on the angular dependence of scattering for plasmons excitations (bulk) in the case of an interacting electron gas, which can serve as a model system for simple metals. We make use of energy filtered diffraction pattern from TEM to collect the signal as a function of momentum transfer. Figure 1 shows the scattering
G. Bertoni, J. Verbeeck, F. Brosens
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Thickness Dependent Loss Function of Si with 0.14 eV Energy Resolution

Advanced Engineering Materials, 2004
Si band gap spectra were recorded by using electron energy loss spectrometry with very high energy resolution of 0.14 eV using a transmission electron microscope with a monochromated electron source. The shape of the spectra change with thickness, becoming indistinct at very thin regions.
Stöger-Pollach, M., Hébert, C., Zandbergen, H. W., Schattschneider, P.   +3 more
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Probability Distribution Functions for Collision Energy Loss

2013
In this chapter, the pdfs describing charged particle collision energy losses of three different conditions are derived. These results are of \( f\left( {x,\Delta E} \right) \) where \( f\left( {x,\Delta E} \right)\mathrm{ d}\left( {\Delta E} \right) \) represents the probability that a charged particle has lost kinetic energy between \( \Delta E ...
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Low-loss Electron Energy-loss Spectroscopy and Dielectric Function of Biological and Geological Polymorphs of CaCO3

Microscopy and Microanalysis, 1999
Previous work on microstructural characterization has shown variations in terms of defects and organization of nanostructures in the two polymorphs of calcium carbonate, calcite, and aragonite in mollusc shells. Large variations in mechanical properties are observed between these sections which have been attributed to variations in composite ...
, Katti, , Qian, , Frech, , Sarikaya
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