Overview

Electron momentum spectroscopy (EMS) 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. In this work, the construction of spectrometers and acquisition and reduction of cross-section data are described in detail. The quantum theory of the reaction is explained and experimental verification is given. The work demonstrates 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. Relationships with less complete methods of investigating electronic structure are discussed. The volume provides examples of determination of atomic and molecular orbitals and quantities relating them to observed states of the residual ion. For amorphous, polycrystalline and crystalline solids and surfaces, examples illustrate the energy-momentum density of valence electron bands, and effects due to electron diffraction and plasmon excitation. The author aims to give a complete account of electron momentum spectroscopy and its scientific importance, as the only sensitive and experimentally-verifiable test available for all aspects of calculating electronic structure.

Full Product Details

Author:   Erich Weigold ,  Ian McCarthy
Publisher:   Springer Science+Business Media
Imprint:   Kluwer Academic/Plenum Publishers
Edition:   1999 ed.
Dimensions:   Width: 15.50cm , Height: 1.80cm , Length: 23.50cm
Weight:   1.280kg
ISBN:  

9780306461576

ISBN 10:   0306461579
Pages:   273
Publication Date:   31 December 1999
Audience:   College/higher education ,  Professional and scholarly ,  Postgraduate, Research & Scholarly ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   In Print  
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Table of Contents

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.

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