Search for dissertations about: "electron correlation"

Showing result 11 - 15 of 275 swedish dissertations containing the words electron correlation.

  2. 11. Spectroscopic studies of the negative state of atoms

    Author : Jakob Welander; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic Physics; Photodetachment; Negative Ions; Anions; Laser Photodetachment Spectroscopy; Electron Affinity; ISOLDE; CERN; Radioisotopes; Photo Angular Distributions; Graphene; Electron correlation; Neutral Particle Detection; Wannier s Threshold Law;

    Abstract : Negative ions are of fundamental interest in atomic physics due to the enhanced importance of the electron correlation. In this thesis new spectroscopic methods have been developed and then applied to study the nature of atomic negative ions. READ MORE

  4. 12. Spectroscopy of Stable and Radioactive Negative Ions

    Author : Annie Ringvall-Moberg; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atomic Physics; ISOLDE; CERN; Electron Correlation; Electron Affinity; Photodetachment; Negative Ions; Anions; Radioisotopes; Laser Photodetachment Spectroscopy; Resonance Ionization; Neutral Particle Detection; Wigner Threshold Law; Molecular Dissociation; RFQcb; DESIREE; Radiative Lifetimes;

    Abstract : Negative ions are unique quantum systems which are of fundamental interest within the field of atomic physics due to the importance of the electron correlation in their creation, stability, and existence. Properties of these ions, such as the electron affinity, i.e. READ MORE

  5. 13. Photodetachment of Negative Ions. Experimental Investigations of Threshold and Continuum Structures

    Author : Joakim Sandström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; electron correlation; resonance ionization spectroscopy; doubly excited states; electron affinity; accelerator mass spectrometry; photodetachment;

    Abstract : In this thesis photodetachment studies of atomic negative ions where one or several electrons are detached from a negative ion are presented. Negative ions are unique objects since their formation and destruction mechanisms strongly depend on the correlated motion of the valence electrons. READ MORE

  6. 14. Electronic transitions and correlation effects : From pure elements to complex materials

    Author : Johan Jönsson; Igor A. Abrikosov; Marcus Ekholm; Sergei Dudarev; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Electronic transition; solid state physics; condensed matter physics; correlation effects;

    Abstract : Macroscopic properties of real materials, such as conductivity, magneticproperties, crystal structure parameters, etc. are closely related or evendetermined by the configuration of their electrons, characterized by electronicstructure. By changing the conditions, e.g, pressure, temperature, magnetic/electric field, chemical doping, etc. READ MORE

  7. 15. Image Processing in High Resolution Transmission Electron Microscopy of Inorganic Materials

    Author : Anna Carlsson; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Oorganisk kemi; Inorganic chemistry; electron diffraction; Electron microscopy; image processing;

    Abstract : High resolution transmission electron microscopy and digital image processing has been used to investigate the structure and properties of inorganic materials. The image processing was performed with the programming language Semper. All routines are listed in the appendix. READ MORE