Modeling of free electronic state density in hydrogenic plasmas based on nearest neighbor approximation

2014 ◽  
Vol 21 (7) ◽  
pp. 072713
Author(s):  
Takeshi Nishikawa
Keyword(s):  
Electronic State ◽  
Nearest Neighbor ◽  
State Density ◽  
Electronic State Density ◽  
Neighbor Approximation

scholarly journals X-ray spectroscopy study of ThO2 and ThF4

2010 ◽  
Vol 25 (1) ◽  
pp. 8-12
Author(s):  
Anton Teterin ◽  
Mikhail Ryzhkov ◽  
Yury Teterin ◽  
Ernst Kurmaev ◽  
Konstantin Maslakov ◽  
...  
Keyword(s):  
Binding Energy ◽  
Energy Range ◽  
Density Distribution ◽  
Electronic State ◽  
Electronic States ◽  
State Density ◽  
Molecular Orbitals ◽  
Spectral Structure ◽  
X Ray ◽  
Electronic State Density

The structure of the X-ray photoelectron, X-ray O(F)Ka-emission spectra from ThO2 and ThF4 as well as the Auger OKLL spectra from ThO2 was studied. The spectral structure was analyzed by using fully relativistic cluster discrete variational calculations of the electronic structure of the ThO8 D4h) and ThF8 (C2) clusters reflecting thorium close environment in solid ThO2 and ThF4. As a result it was theoretically found and experimentally confirmed that during the chemical bond formation the filled O(F)2p electronic states are distributed mainly in the binding energy range of the outer valence molecular orbitals from 0-13 eV, while the filled O(F)2s electronic states - in the binding energy range of the inner valence molecular orbitals from 13-35 eV. It was shown that the Auger OKLL spectral structure from ThO2 characterizes not only the O2p electronic state density distribution, but also the O2s electronic state density distribution. It agrees with the suggestion that O2s electrons participate in formation of the inner valence molecular orbitals, in the binding energy range of 13-35 eV. The relative Auger OKL2-3L2-3 peak intensity was shown to reflect quantitatively the O2p electronic state density of the oxygen ion in ThO2.

Electronic state density of highly conducting polyacetylene

1991 ◽  
Vol 41 (1-2) ◽  
pp. 117-120 ◽  
Author(s):  
Y. Nogami ◽  
H. Kaneko ◽  
T. Ishiguro ◽  
N. Hosoito ◽  
J. Tsukamoto ◽  
...  
Keyword(s):  
Electronic State ◽  
State Density ◽  
Electronic State Density

scholarly journals Valence electronic state density in thorium dioxide

2008 ◽  
Vol 23 (2) ◽  
pp. 34-42 ◽  
Author(s):  
Anton Teterin ◽  
Mikhail Ryzhkov ◽  
Yury Teterin ◽  
Labud Vukcevic ◽  
Vladimir Terekhov ◽  
...  
Keyword(s):  
Electronic State ◽  
State Density ◽  
Molecular Orbitals ◽  
Photoelectron Spectra ◽  
Spectral Structure ◽  
Discrete Variation ◽  
Thorium Dioxide ◽  
X Ray ◽  
Electronic State Density ◽  
First Time

This work analyses the fine low energy (0-40 eV) X-ray photoelectron spectra of ThO2, taking into account relativistic X?-discrete variation electronic structure calculations for the ThO8 (D4h) cluster reflecting thorium's close environment in ThO2. As a result, it was theoretically shown and experimentally confirmed that Th5f electrons in ThO2 can participate directly (~0.6 Th5f electrons) in chemical bond formation.Th6p electrons were shown to be a significant part (~0.44 Th6p electrons) not only of inner valence molecular orbitals, but to play a significant role in outer valence molecular orbitals formation, as well. Inner valence molecular orbitals composition and sequent order were established to belong to the binding energy range of 13 eV to 40 eV. The valence electronic state density in the range of 0-40 eV in ThO2 was also calculated. For the first time, these data allowed an interpretation of the fine X-ray photoelectron spectra (0-40 eV) and high resolution O4,5(Th) X-ray emition spectral structure (~60 - ~85 eV) of ThO2.

scholarly journals Особенности электронной структуры интерметаллических соединений CeNi-=SUB=-4-=/SUB=-M (M=Fe, Co, Ni, Cu)

2018 ◽  
Vol 60 (3) ◽  
pp. 461
Author(s):  
А.В. Лукоянов ◽  
А.А. Широков
Keyword(s):  
Electronic Structure ◽  
Fermi Level ◽  
Total Energy ◽  
Electronic State ◽  
Magnetic Moments ◽  
State Density ◽  
Total Density ◽  
Substitutional Impurity ◽  
Self Consistent ◽  
Electronic State Density

AbstractThe evolution of the electronic structure of CeNi_4M (M = Fe, Co, Ni, Cu) intermetallics depending on the type of nickel substitutional impurity is explored. We have calculated band structures of these compounds and considered options of substituting one atom in nickel 3 d sublattice in both types of crystallographic positions: 2 c and 3 g . The analysis of total energy self-consistent calculations has shown that positions of 2 c type are more energetically advantageous for single iron and cobalt impurities, whereas a position of 3 g type is better for a copper impurity. The Cu substitutional impurity does not change either the nonmagnetic state of ions or the total density at the Fermi level states. Fe and Co impurities, on the contrary, due to their considerable magnetic moments, induce magnetization of 3 d states of nickel and cause significant changes in the electronic state density at the Fermi level.

Stable Divergence Angles of a Magnetic Dipole Spiral Array

1997 ◽  
Vol 11 (24) ◽  
pp. 1069-1075
Author(s):  
X. D. Fan ◽  
L. A. Bursill
Keyword(s):  
Nearest Neighbor ◽  
Initial Conditions ◽  
Equations Of Motion ◽  
Divergence Angle ◽  
Magnetic Dipoles ◽  
Analytical Proof ◽  
The Difference ◽  
Spiral Array ◽  
Map Analysis ◽  
Neighbor Approximation

An analytical model is introduced for the experiment of Douady and Couder [Phys. Rev. Lett.68, 2098 (1992), where phyllotactic patterns appear as a dynamical result of the interaction between magnetic dipoles. The difference equation for the divergence angle (i.e. the angle between successive radial vectors) is obtained by solving the equations of motion with a second nearest neighbor (SNN) approximation. A one-dimensional map analysis as well as a comprehensive analytical proof shows that the divergence angle always converges to a single attractor regardless of the initial conditions. This attractor is approximately the Fibonacci angle(~ 138°) within variations due to a growth factor μ of the pattern. The system is proved to be stable with the SNN approximation. Further analysis with a third nearest neighbor approximation (TNN) shows extra linearly stable attractors may appear around the Lucas angle (~ 99.5°).

Interactions dans une chaîne de sphères ou de cavités alignées. Plasmons de surface et énergie de Van der Waals

1977 ◽  
Vol 55 (16) ◽  
pp. 1407-1422 ◽  
Author(s):  
A. Ronveaux ◽  
A. Moussiaux ◽  
A. A. Lucas
Keyword(s):  
Power Series ◽  
Surface Plasmon ◽  
Nearest Neighbor ◽  
Van Der Waals ◽  
Nearest Neighbors ◽  
Distance Ratio ◽  
First Approximation ◽  
Spherical Cavities ◽  
Plasmon Oscillation ◽  
Neighbor Approximation

The eigenmodes of surface plasmon oscillation for an arbitrary number of aligned spheres or spherical cavities are given by a power series of the radius–distance ratio. The Van der Waals energy is calculated in first approximation for an arbitrary chain, and in second approximation for an array of two holes and two spheres.The error due to the neglect of all interactions except that between nearest neighbors is analysed in detail together with the bands of the infinite chain in the nearest neighbor approximation. [Journal translation]

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