Results 251 to 260 of about 596,723 (309)
A free electron model for pyridine
Journal de Chimie Physique, 1972 The free electron model tor the pi-electron system in benzene has been extended to the case of pyridine introducing an angular perturbation; calculated spectral transition and other physical characteristics have been found to be in good agreement with those obtained by LCAO-MO method.
Sanat K. Adhikari +2 more
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Free‐electron model for electronic spectra of benzene
International Journal of Quantum Chemistry, 1969 AbstractUsing a three dimensional free‐electron model for the π‐electron system the energies of the various singly and doubly excited configurations of benzene have been calculated. It has been found that the energies of the various singly excited configurations are in good agreement with the values obtained by Craig; whereas the energies of the doubly
Purnendranath Sen, Sadhan Basu
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Some Modifications of the Free-Electron Model
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy, 1953 application/pdfThe perimeter-free-electron model which is rather the crude approximation for the calculation of the π-electronic spectra of a conjugated system is modified at some points.
NAKAJIMA, Takeshi
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1990
The characteristic properties of metals and semiconductors are due to their conduction electrons: the electrons in the outermost atomic shells, which in the solid state are no longer bound to individual atoms, but are free to wander through the solid. A proper understanding of metallic or semiconducting behaviour could not begin, obviously, until the ...
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The characteristic properties of metals and semiconductors are due to their conduction electrons: the electrons in the outermost atomic shells, which in the solid state are no longer bound to individual atoms, but are free to wander through the solid. A proper understanding of metallic or semiconducting behaviour could not begin, obviously, until the ...
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Hamiltonian model of a free electron laser
Optics Communications, 1987Abstract Both the Compton and the Raman regimes of a free electron laser are described by a relative hamiltonian which originates the evolution equations for 2 N + 2 canonically conjugate electron and field variables, with the space coordinate as the independent variable.
Rodolfo Bonifacio +2 more
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Modeling of Free Electron Laser Ablation
2002Abstract : Development of a coarse-grained chemical reaction model (CGCRM) for incorporation into molecular dynamics (MD) simulations in order to assess the effects of chemical reactions on the ablation process. This model has been successfully applied to the ablation of organic systems and is now being implemented for polymers and biological materials.
Leonid V. Zhigilei, Barbara J. Garrison
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The nearly-free electron model
2001Abstract We are now going to consider the solutions of the Schrodinger equation for an electron in a periodic potential in the case that the potential is very weak, i.e. the electron is nearly free.
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Modelling and identification of a free electron laser RF system
2006 IEEE Conference on Computer Aided Control System Design, 2006 IEEE International Conference on Control Applications, 2006 IEEE International Symposium on Intelligent Control, 2006The operation of a Free Electron Laser in the X-ray wavelength range is the goal of the international XFEL project. The project critically depends on the linear accelerator component, where radio frequency fields have to be controlled with a very high amplitude and phase precision and under various sources of disturbances.
Koch, Guido +4 more
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