Search for dissertations about: "electron emission"

Showing result 1 - 5 of 294 swedish dissertations containing the words electron emission.

  1. 1. Multi-Electron Coincidence Studies of Atoms and Molecules

    Author : Egil Andersson; Raimund Feifel; Jan-Erik Rubensson; Kiyoshi Ueda; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; multi-ionization; electron emission; time-of-flight spectroscopy; coincidence spectroscopy; core-valence ionization; synchrotron radiation; electron correlation; Atomic and molecular physics; Atom- och molekylfysik; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : This thesis concerns multi-ionization coincidence measurements of atoms and small molecules using a magnetic bottle time-of-flight (TOF) spectrometer designed for multi-electron coincidence studies. Also, a time-of-flight mass spectrometer has been used together with the TOF electron  spectrometer for electron-ion coincidence measurements. READ MORE

  2. 2. Field emission from multi-walled carbon nanotubes

    Author : Martin Sveningsson; Chalmers University of Technology; []
    Keywords : electron field emission; scanning tunneling microscope STM ; scanning electron microscope SEM ; transmission electron microscope TEM ; chemical vapour deposition; black-body radiation; current densities; carbon nanotubes;

    Abstract : .... READ MORE

  3. 3. Angle-Dependent Electron Spectroscopy Studies of C60 Compounds and Carbon Nanotubes

    Author : Joachim Schiessling; P. A. Brühwiler; J. Nordgren; Hans-Peter Steinrück; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Physics; fullerenes; C60; K3C60; multi-walled carbon nanotubes; molecules; clusters; electron spectroscopy; synchrotron radiation; x-ray absorption; x-ray emission; molecular orbitals; charge transfer; electron correlation; surface physics; Fysik; Physics; Fysik;

    Abstract : Fullerenes have been shown to constitute a prototypical building block for truly nanometer-sized devices and exotic nanounit-based materials, e.g., high-temperature superconductors. READ MORE

  4. 4. Model Studies of Electron Transfer and Reaction Dynamics at Surfaces

    Author : Johan Strömquist; Chalmers University of Technology; []
    Keywords : dissociation; desorption; oxidation; hot precursors; surface chemical reaction; chemiluminescence; surface harpooning; charge transfer; electron emission; transient mobility; non-adiabaticity;

    Abstract : Charge-transfer is of key importance in many physical, chemical and biological processes, including surface reactions. This thesis consists of several theories for and model studies of surface reactions that are initiated by electron transfer between the surface to a molecule. READ MORE

  5. 5. Ultrafast spin, lattice, and electron dynamics in thin metallic films : in the terahertz, near-infrared, and extreme ultraviolet regimes

    Author : Vivek Unikandanunni; Stefano Bonetti; Andreas Rydh; Jurgen Lindner; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Terahertz; near-infrared; extreme ultraviolet; epitaxial cobalt; transient grating; field emission; gold; platinum; electron-phonon coupling; magneto-crystalline anisotropy; nanoscale dynamics; ultrafast spin dynamics; magnetic inertia; nutation; pump-probe; two-temperature model; Fowler-Nordheim tunneling; fysik; Physics;

    Abstract : In this thesis, we studied the ultrafast spin and electron dynamics triggered by electromagnetic radiation belonging to three different regions of the electromagnetic spectrum, namely terahertz, near-infrared and extreme ultraviolet. By performing pump–probe measurements, we explored the role of the lattice in ultrafast spin and electron dynamics in metallic thin films. READ MORE