FOURIER ANALYSIS OF EXAFS DATA FOR COPPER METAL AND COPPER COMPLEXES OF ISOXEZOL SERIES AND DETERMINATION OF STRUCTURAL PARAMETERS

2011 ◽  
Vol 25 (19) ◽  
pp. 2601-2607
Author(s):  
A. MISHRA ◽  
N. PARSAI
Keyword(s):  
Fourier Analysis ◽  
Copper Complexes ◽  
Structural Parameters ◽  
Mean Free Path ◽  
Copper Metal ◽  
Interatomic Distances ◽  
Exafs Data ◽  
The Mean ◽  
Inelastic Mean Free Path

In this paper we deal with the Fourier analysis of EXAFS data and illustrate this by a detailed analysis of the data for copper metal and copper complexes of Isoxezol series. Fourier analysis is useful in extracting distances and information about the phase shifts, the amplitudes, the Debye–Waller factors and the mean free paths. Here we have determined interatomic distances, mean square deviation and inelastic mean free path from Fourier transform of EXAFS data for copper metal and copper complexes of Isoxezol series.

Determination of Mean Free Path for Inelastic Scattering in Poly(2-Vinyl Pyridine) by Low-Loss Spectrum Imaging

2000 ◽  
Vol 6 (S2) ◽  
pp. 224-225
Author(s):  
A. Aitouchen ◽  
T. Chou ◽  
M. Libera ◽  
M. Misra
Keyword(s):  
Free Path ◽  
Free Fall ◽  
Mean Free Path ◽  
Specimen Thickness ◽  
Thickness Determination ◽  
Vinyl Pyridine ◽  
Integrated Intensity ◽  
Inelastic Mean Free Path ◽  
Electron Energy Loss

The common experimental method to determine the total inelastic mean free path i by electron energy-loss spectroscopy (EELS) is by the relation : t/λi= ln(It/IO) [1] where t is the specimen thickness, It, is the total integrated intensity, and Io is the intensity of the zero-loss peak. The accuracy of this measurement depends on the thickness determination. Model geometries like cubes, wedges, and spheres enable accurate thickness determination from transmission images.Spherical polymers with diameters of order 10-200nm can be made from a number of high-Tg polymers by solvent atomization. This research studied atomized spheres of poly(2-vinyl pyridine) [PVP]. A solution of 0.1% PVP in THF was nebulized. After solvent evaporation during free fall within the chamber atmosphere, solid spherical polymer particles with a range of diameters were collected on holey-carbon TEM grids at the bottom of the atomization chamber.

scholarly journals Determination of Inelastic Mean Free Path of Electrons in Noble Metals

1992 ◽  
Vol 81 (2) ◽  
pp. 193-199 ◽  
Author(s):  
W. Doliński ◽  
S. Mróz ◽  
J. Palczyński ◽  
B. Gruzza ◽  
P. Bondot ◽  
...  
Keyword(s):  
Free Path ◽  
Noble Metals ◽  
Mean Free Path ◽  
Inelastic Mean Free Path

Nuclear Spin Relaxation Investigations on the Influence of Impurities and Temperature on the Mean Free Path of Mobile Dislocations in Nacl

1980 ◽  
Vol 3 ◽  
Author(s):  
W. H. M. Alsem ◽  
J. Th. ◽  
M. De Hosson ◽  
H. Tamler ◽  
H. J. HackelÖEr ◽  
...  
Keyword(s):  
Free Path ◽  
Lattice Relaxation ◽  
Mean Free Path ◽  
Dislocation Motion ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Activation Rate ◽  
The Mean ◽  
Influence Of Impurities

ABSTRACTDislocation motion in alkali halide single crystals is strongly impeded by the presence of impurities, apart from obstacles built by the forest dislocations. The mean free path L of stepwise moving dislocations is measured by determination of the spin-lattice relaxation rate 1/T1ρ as a function of the strain rate έ, varying the content of impurities and the temperature. The latter influences the distribution of the point defects and the activation rate of dislocations before obstacles, while the former merely shorten L, thereby raising 1/T1ρ.

scholarly journals Determination of the Mean Number of Bonds per snow grain And of the Dependence of the Tensile Strength of Snow on Stereological Parameters

1978 ◽  
Vol 20 (83) ◽  
pp. 329-341 ◽  
Author(s):  
H. Gubler
Keyword(s):  
Tensile Strength ◽  
Density Distribution ◽  
Structural Parameters ◽  
Theoretical Density ◽  
Thin Sections ◽  
Distribution Parameters ◽  
The Mean ◽  
Fundamental Units ◽  
Effective Distribution

AbstractA theoretical density distribution of the Dumber of bonds per grain as a function of the mean number of bonds per grain is derived from the assumption of randomness and isotropy of grain and grain-bond location and orientation. The knowledge of the theoretical density distribution allows the determination of the effective distribution parameters from section planes or thin sections. The concept of the fundamental unit to describe the strength of snow is introduced. Structural parameters developed on the basis of the fundamental units show improved correlations with the tensile strength.

Determination of the Inelastic Mean-Free-Path and Mean Inner Potential for AlAs and GaAs Using Off-Axis Electron Holography and Convergent Beam Electron Diffraction

2007 ◽  
Vol 13 (5) ◽  
pp. 329-335 ◽  
Author(s):  
Suk Chung ◽  
David J. Smith ◽  
Martha R. McCartney
Keyword(s):  
Electron Diffraction ◽  
Theoretical Calculations ◽  
Mean Free Path ◽  
High Energy ◽  
Convergent Beam Electron Diffraction ◽  
Electron Holography ◽  
Beam Electron ◽  
The Mean ◽  
Convergent Beam ◽  
Inelastic Mean Free Path

The mean-free-paths for inelastic scattering of high-energy electrons (200 keV) for AlAs and GaAs have been determined based on a comparison of thicknesses as measured by electron holography and convergent-beam electron diffraction. The measured values are 77 ± 4 nm and 67 ± 4 nm for AlAs and GaAs, respectively. Using these values, the mean inner potentials of AlAs and GaAs were then determined, from a total of 15 separate experimental measurements, to be 12.1 ± 0.7 V and 14.0 ± 0.6 V, respectively. These latter measurements show good agreement with recent theoretical calculations within experimental error.

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