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Fine Structures

EXAFS Extended X-ray absorption fine structure spectroscopy. A spectroscopic technique which can determine interatomic distances very precisely. [Pg.170]

In addition to this electron spin fine structure there are often still finer lines present. These are known as the hyperfine structure, which arises from the dilTerent weights of the isotopes of an element or from the spin of the nucleus. [Pg.267]

In nuclear spectroscopy fine structure arises from coupling between nuclear spins. [Pg.267]

The X-ray instrumentation requires a commercial small angle X-ray camera, a standard fine structure X-ray generator and a sample manipulator if scanning is requested. The essential signal is the relative difference between the refraction level Ir and the absorption level Ia. Both levels are measured simultaneously by two scintillation detectors. At fixed angles of deflection this signal depends solely on the inner surface density factor C and thickness d of the sample [2] ... [Pg.558]

APD, ARPEFS Azimuthal PED, angle- Same as PED resolved photoemission extended fine structure Spectroscopy of Emitted X-rays or Photons Same as PED... [Pg.314]

EXAFS Extended x-ray absorption fine structure [177, 178] Variation of x-ray absorption as a function of x-ray energy beyond an absorption edge the probability is affected by backscattering of the emitted electron from adjacent atoms Number and interatomic distance of surface atoms... [Pg.316]

It is possible to understand the fine structure in the reflectivity spectrum by examining the contributions to the imaginary part of the dielectric fiinction. If one considers transitions from two bands (v c), equation A1.3.87 can be written as... [Pg.119]

Electronic spectra are almost always treated within the framework of the Bom-Oppenlieimer approxunation [8] which states that the total wavefiinction of a molecule can be expressed as a product of electronic, vibrational, and rotational wavefiinctions (plus, of course, the translation of the centre of mass which can always be treated separately from the internal coordinates). The physical reason for the separation is that the nuclei are much heavier than the electrons and move much more slowly, so the electron cloud nonnally follows the instantaneous position of the nuclei quite well. The integral of equation (BE 1.1) is over all internal coordinates, both electronic and nuclear. Integration over the rotational wavefiinctions gives rotational selection rules which detemiine the fine structure and band shapes of electronic transitions in gaseous molecules. Rotational selection rules will be discussed below. For molecules in condensed phases the rotational motion is suppressed and replaced by oscillatory and diflfiisional motions. [Pg.1127]

If the experunental technique has sufficient resolution, and if the molecule is fairly light, the vibronic bands discussed above will be found to have a fine structure due to transitions among rotational levels in the two states. Even when the individual rotational lines caimot be resolved, the overall shape of the vibronic band will be related to the rotational structure and its analysis may help in identifying the vibronic symmetry. The analysis of the band appearance depends on calculation of the rotational energy levels and on the selection rules and relative intensity of different rotational transitions. These both come from the fonn of the rotational wavefunctions and are treated by angnlar momentum theory. It is not possible to do more than mention a simple example here. [Pg.1139]

For bulk structural detemiination (see chapter B 1.9). the main teclmique used has been x-ray diffraction (XRD). Several other teclmiques are also available for more specialized applications, including electron diffraction (ED) for thin film structures and gas-phase molecules neutron diffraction (ND) and nuclear magnetic resonance (NMR) for magnetic studies (see chapter B1.12 and chapter B1.13) x-ray absorption fine structure (XAFS) for local structures in small or unstable samples and other spectroscopies to examine local structures in molecules. Electron microscopy also plays an important role, primarily tlirough unaging (see chapter B1.17). [Pg.1751]

SEELFS (surface extended energy loss fine structure) yes 2 0.2... [Pg.1754]

Lee P A, Citrin P H, Eisenberger P and Kincaid B M 1981 Extended x-ray absorption fine structure—its strengths and limitations as a structural tool Rev. Mod. Rhys. 53 769-806... [Pg.1776]

Iwasawa Y (ed) 1996 X-Ray Absorption Fine Structure for Cataiysis and Surfaces (Singapore World Scientific)... [Pg.1798]

Stdhr J, Kollin E B, Fischer D A, Flastings J B, Zaera F and Sette F 1985 Surface extended x-ray-absorption fine structure of low-Z adsorbates studied with fluorescence detection Rhys. Rev. Lett. 55 1468-71... [Pg.1798]

Zaera F, Fischer D A, Carr R G and Gland J L 1988 Determination of chemisorption geometries for complex molecules by using near-edge X-ray absorption fine structure ethylene on Ni(IOO) J. Chem. Rhys. 89 5335-41... [Pg.1798]

Ingalls R, Crozier E D, Whitmore J E, Seary A J and Tranquada J M 1980 Extended x-ray absorption fine structure of sodium bromide and germanium at high pressure J. Appl. Phys. 51 3158... [Pg.1965]

Figure B2.5.12 shows the energy-level scheme of the fine structure and hyperfme structure levels of iodine. The corresponding absorption spectrum shows six sharp hyperfme structure transitions. The experimental resolution is sufficient to detennine the Doppler line shape associated with the velocity distribution of the I atoms produced in the reaction. In this way, one can detennine either the temperature in an oven—as shown in Figure B2.5.12 —or the primary translational energy distribution of I atoms produced in photolysis, equation B2.5.35. Figure B2.5.12 shows the energy-level scheme of the fine structure and hyperfme structure levels of iodine. The corresponding absorption spectrum shows six sharp hyperfme structure transitions. The experimental resolution is sufficient to detennine the Doppler line shape associated with the velocity distribution of the I atoms produced in the reaction. In this way, one can detennine either the temperature in an oven—as shown in Figure B2.5.12 —or the primary translational energy distribution of I atoms produced in photolysis, equation B2.5.35.
Schertel A, Hahner G, Grunze M and Well C 1996 Near edge x-ray adsorption fine structure investigation of the... [Pg.2631]

Fischer D, Marti A and Hahner G 1997 Orientation and order in microcontact-printed, seif-assembied monoiayers of aikanethiois on goid investigated with near edge x-ray absorption fine structure spectroscopy J. Vac. Sc/. Technol. A 15 (4) 2173-80... [Pg.2638]

Wu S, Lipkowski J, Tyiiszczak T and Hitchcock A P 1997 Eariy stages of copper eiectrocrystaiiization eiectrochemicai and in situ x-ray absorption fine structure studies of coadsorption of copper and chioride at the Au(111) eiectrode surface J.Phys. Chem. B 101 10 310-22... [Pg.2757]

Rehr J J, Mustre de Leon J, Zabinski S I and Albers R C 1991 Theoretical x-ray absorption fine structure standards J. Am. Chem. Soc. 113 5135-40... [Pg.2759]


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A, fine structure constant

Absorption fine structure spectroscopy

Absorption fine structure spectroscopy Adsorbed metals

Absorption fine structures

Absorption-edge fine structure

Accounting for the fine structure in a spectrum

Amino acids fine structure

Amylopectin fine structures

Amylose fine structures

Analogies to Muscle Function and Fine Structure

Analyte fine structural details

Angle-resolved photoemission extended fine structure

Appearance potential spectroscopy fine structure

Aramid fibers fine structure

Asymmetry fine-structure

Atomic X-ray absorption fine structur

Auger electron spectroscopy fine structures

Carotenoids fine structure

Catalyst characterization fine structure

Cellulose fine structure

Cost structure, indicative, fine chemical

Cost structure, indicative, fine chemical production

Crosspeak fine structure

Determination the fine structure constant

ECD Spectra Computed with Vibrational Fine Structure

EXAFS absorption fine structure

EXAFS fine structure

EXAFS fine structure spectroscopy

EXAFS spectra absorption fine structure spectroscopy

EXAFS/ XAFS fine structure

EXAFS—See Extended x-ray absorption fine structure

EXELFS fine structure

Edge X-ray absorption fine structure

Edge X-ray absorption fine structure EXAFS)

Electron Appearance Potential Fine Structure

Electron fine-structure spectrum

Electron pulse fine structure

Energy fine-structure splitting

Energy-level fine structure

Extended Energy-Loss Fine Structure

Extended X-Ray absorption fine structure technique

Extended X-ray Absorption Fine Structure, EXAF

Extended X-ray Absorption Fine Structure. See

Extended X-ray Energy Loss Fine Structure

Extended X-ray absorption edge fine structure

Extended X-ray absorption fine structur

Extended X-ray absorption fine structure EXAFS) analysis

Extended X-ray absorption fine structure EXAFS) measurements

Extended X-ray absorption fine structure EXAFS) region

Extended X-ray absorption fine structure EXAFS) spectroscopy

Extended X-ray absorption fine structure EXAFS) technique

Extended X-ray absorption fine structure Fe 2, synthesis

Extended X-ray absorption fine structure Fourier transform

Extended X-ray absorption fine structure measurment

Extended X-ray absorption fine structure spectroscopy

Extended X-ray adsorption fine structure

Extended X-ray adsorption fine structure EXAFS)

Extended X-ray fine structure

Extended absorption fine structure

Extended absorption fine structure (EXAFS

Extended absorption fine structure spectroscopy,

Extended appearance potential fine structur

Extended appearance potential fine structure

Extended energy- loss fine structure EXELFS)

Extended fine structure techniques

Extended x-ray absorption fine structure

Extended x-ray absorption fine structure EXAFS

Extended x-ray absorption fine structure EXAFS) spectra

Fibrous fine structure

Fine Structure Intervals of Alkali Atoms

Fine Structure and Spin Hamiltonian

Fine Structure and Texture of PAN based Carbon Fibers

Fine Structure of Cellulose

Fine Structure of Xylans

Fine Structure of the Triple Line

Fine Structure or Zero-Field Splitting

Fine Structures of Amylose and Amylopectin

Fine structure alkali

Fine structure analysis

Fine structure changing collisions

Fine structure components

Fine structure constant

Fine structure constant photoionization

Fine structure definition

Fine structure determination

Fine structure disregard

Fine structure hypothesis

Fine structure interval

Fine structure mapping

Fine structure of PET fibers

Fine structure of hydrogen

Fine structure of the turbulence in EPRs

Fine structure origin

Fine structure spectroscopic

Fine structure splitting, alkali atoms

Fine structure splittings

Fine structure tensor

Fine structure theory

Fine structure uncertainty

Fine structure with quantum electrodynamics

Fine structure without

Fine structure: Sommerfeld

Fine structure: higher order contributions

Fine-Structure Splittings with Experiment

Fine-stranded gels network structure

Fine-structure constant, Sommerfeld

Fine-structure effect

Fine-structure parameters

Fine-structure splitting

Fine-structure splitting, electron spin

Fine-structure states

Fine-structure techniques

Fine-structured background

Fine-structured spectra

Fourier transform absorption fine structure

Free fine structure

Galactomannans fine structure

Galactomannans hydrolysis, effect of fine structure

Genetic fine structure

Glycogen fine structure

Gravitational fine-structure constant

Hamiltonian fine-structure splitting

Helium fine structure

Helium fine structure splitting

Heparin fine structure

Higher-order fine structure terms

Hydrogen fine structure

Hydrogen spectrum, fine structure

Hydrogen, atomic fine structure

Infrared bands, rotational fine structure

Inverted fine structure

Kronig fine structure

Lithium fine structure

Molecular complexes, fine structure constants

Molecular spectral fine structures

Muscle fine structure

NEXAFS Fine Structure spectroscopy

NEXAFS absorption fine structure

NEXAFS fine structure

NEXAFS fine-structure spectra

NEXAFS spectroscopy absorption fine structure

Near edge X-ray absorption fine structure NEXAFS)

Near edge x-ray absorption fine structur

Near statistical fine structure

Near-edge X-ray absorption fine structure

Near-edge X-ray absorption fine structure NEXAFS) spectroscopy

Near-edge X-ray absorption fine-structure spectra

Near-edge fine structure

Near-edge fine structure techniques

Near-edge fine structure techniques, surface

Nitrogen ions fine-structure splitting

Nuclear magnetic resonance spectroscopy fine structure

Oscillatory fine structure

Peak fine structure

Photoelectron spectroscopy fine structures

Polarisation fine-structure effect

Poly fine structure

Positronium fine structure

Possibility of Obtaining Fine Disperse Structures in Melts by Hardening Melt Emulsions

Quantum defects and fine structure

Quantum electrodynamics fine-structure constant

Quantum fine structure constant

Radiofrequency fine structure

Reflection extended X-ray absorption fine structure

Relativistic fine structure effects

Rotational Fine Structure in Electronic Band Spectra

Rotational fine structure

Rovibrational and fine structure parameters

Rovibrational fine structure

SEELFS fine structure

SEXAFS (Surface-Sensitive Extended X-Ray Absorption Fine Structure)

Secondary electron fine structure

Selection rules rotational fine structure

Signal fine structure

Silicon fine structure studies

Spectra fine structure

Spectral lines, fine structure

Starch granules fine structure

Statistical fine structure

Structure transformation fine dispersed phase

Surface Electron Energy Loss Fine Structure

Surface Fine Structure

Surface X-ray absorption fine structure

Surface extended X-ray absorption fine structur

Surface extended X-ray absorption fine structure

Surface extended energy loss fine structure

Surface extended x-ray absorption fine structure, SEXAFS

Surface-extended X-ray absorption fine structure spectroscopy

Synchrotron Absorption Fine Structure

Synchrotron-based near-edge X-ray fine structure spectroscopy

The Case of Two or More Unpaired Electrons Fine Structure

The Fine Structure Before and After Each Edge

The Fine Structure of Hydroxypurines

The Fine-Structure Constant A Strange Number

The appearance of fine structure

The effective fine structure constant

The fine structure

The origin of fine structure

Tryptophan fine structure

Tyrosine fine structure

Ultra-fine grain structure

Universe fine-structure constant

Vibrational fine structure

Vibrational fine structure effects

Vibronic fine structure

Vitrinite fine structure

Water, rotational fine structure

X-ray absorption fine structure

X-ray absorption fine structure EXAFS)

X-ray absorption fine structure data

X-ray absorption fine structure spectra

X-ray absorption fine structure spectroscop

X-ray absorption fine structure spectroscopy

X-ray absorption fine structure spectroscopy XAFS)

X-ray absorption fine structure studies

X-ray absorption fine structure. See

X-ray adsorption fine structure

X-ray fine structure

XAFS (“X-ray absorption fine structure

XANES absorption fine structure

XAS and Extended X-Ray Absorption Fine Structure (EXAFS) for Determination of the Short-Range Order

Xylans fine structure

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