Electron Momentum Spectroscopy
(Sprache: Englisch)
Electron Momentum Spectroscopy measures the energy-momentum density of the electrons in atoms, molecules and solids by means of a kinematically-complete ionization reaction initiated by an electron beam. The construction of spectrometers and the acquisition...
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Klappentext zu „Electron Momentum Spectroscopy “
Electron Momentum Spectroscopy measures the energy-momentum density of the electrons in atoms, molecules and solids by means of a kinematically-complete ionization reaction initiated by an electron beam. The construction of spectrometers and the acquisition and reduction of cross-section data are described in detail. The quantum theory of the reaction is explained and the experimental verification is given. It is shown how to extract quasiparticle orbitals, and coefficients describing electron correlations of the data. These quantities are derived from the many-body theory of the electronic structure of atoms, molecules and solids. The relationship to less complete methods of investigating electronic structure is discussed. Examples are given of the determination of atomic and molecular orbitals and quantities relating them to the observed states of the residual ion. For amorphous, polycrystalline and crystalline solids and surfaces, examples show the energy-momentum density of valence electron bands, and effects due to electron diffraction and plasmon excitation.
The book aims to give a complete account of electron momentum spectroscopy to date. Its significance is that it is a sensitive and experimentally-verifiable test of essentially every aspect of calculations of electronic structure. It is the only such probe available.
Inhaltsverzeichnis zu „Electron Momentum Spectroscopy “
1. Introduction to Electron Momentum Spectroscopy.- 1.1. Electron Impact Ionization.- 1.2. Units.- 1.3. EMS Kinematics.- 1.4. The Relation between Coordinate and Momentum Space: The Hydrogen Atom and the Free Particle.- 1.5. The Ionization Cross Section.- 1.6. Semiclassical Picture of EMS.- 1.7. Quantum-Mechanical Description of EMS.- 2. Experimental Techniques.- 2.1. Electron Sources.- 2.2. Detection of Electrons.- 2.3. Electron Momentum Analyzers.- 2.4. Target Preparation.- 2.5. Coincidence Techniques.- 2.6. Multiparameter Data Acquisition and Reduction.- 3. Theory of Electron Momentum Spectroscopy.- 3.1. The Born-Oppenheimer Approximation.- 3.2. The Binary-Encounter Approximation.- 3.3. The Impulse Approximation.- 3.4. The Distorted-Wave Impulse Approximation.- 3.5. The Structure Amplitude.- 4. Outline of Structure Theory.- 4.1. Symmetry of a Molecular Orbital.- 4.2. The Hartree-Fock Method.- 4.3. Self-Consistent-Field Orbitals.- 4.4. Density-Functional Theory.- 4.5. Electron Band Theory of a Crystal.- 4.6. The Quasiparticle Equation.- 4.7. The Weak-Coupling Approximation.- 5. Atoms.- 5.1. Orbital Mapping.- 5.2. Relativistic Effects.- 5.3. Excited and Oriented Target States.- 5.4. Initial- and Final-State Correlations.- 6. Molecules.- 6.1. Momentum-Space Chemistry.- 6.2. Molecular Examples.- 6.3. Outer Valence Region.- 6.4. Inner Valence Region.- 6.5. Core States.- 6.6. Summary.- 7. Solids.- 7.1. The Flinders Experiments.- 7.2. Polycrystalline Aluminum.- 7.3. Aluminum Oxide.- 7.4. Crystalline Graphite.- 7.5. Silicon.- 7.6. Allotropes of Carbon.- 7.7. Copper.- 8. Comparison with Other Spectroscopies.- 8.1. Summary of EMS.- 8.2. Partially-Integrated Momentum Densities.- 8.3. Photoelectron Spectroscopy.- References.
Bibliographische Angaben
- Autoren: Erich Weigold , Ian McCarthy
- 2012, Softcover reprint of the original 1st ed. 1999, 273 Seiten, Masse: 15,5 x 23,5 cm, Kartoniert (TB), Englisch
- Verlag: Springer, Berlin
- ISBN-10: 1461371643
- ISBN-13: 9781461371649
Sprache:
Englisch
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