Search for dissertations about: "FINE-STRUCTURE"

Showing result 1 - 5 of 105 swedish dissertations containing the word FINE-STRUCTURE.

  2. 1. Fine Structure and semi ordered structures : Extended energy loss fine structure investigations of semi ordered materials

    Author : Riitta Räty; Edward A Stern; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Abstract : This thesis is based on structure determinations of solid materials with Extended energy loss fine structure (EXELFS) analysis. In this method the ionisation edges of a material recorded in an electron microscope are studied. The focus is on different hard materials. READ MORE

  4. 2. Photodetachment spectroscopy : negative ion bound states and resonances Gunnar Haeffler

    Author : Gunnar Haeffler; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; electron correlation; electron affinity; shape resonance; fine structure; ion optics; photodetachment; resonance ionization spectroscopy RIS ; Wigner law; doubly excited state; Feshback resonance; negative ion; electron spectroscopy;

    Abstract : .... READ MORE

  5. 3. Three-dimensional mapping of fine structure in the solar atmosphere

    Author : Vasco M. J. Henriques; Dan Kiselman; Göran Scharmer; Hector Socas-Navarro; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sun; sunspots; Swedish 1-meter Solar Telescope; active regions; image processing; sunspot penumbra; Astronomy; astronomi;

    Abstract : The effects on image formation through a tilted interference filter in a converging beam are investigated and an adequate compensation procedure is established. A method that compensates for small-scale seeing distortions is also developed with the aim of co-aligning non-simultaneous solar images from different passbands. READ MORE

  6. 4. Extended fine structure and hyperfine structure studies using EXELFS and Mössbauer spectroscopy

    Author : Stefan Csillag; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  7. 5. Studies of atomic environments in solids using EXtended Energy Loss Fine Structure, EXELFS

    Author : Mohammad-Amirhamzeh Tafreshi; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Extended Energy Loss Fine Structure (EXELFS) is the modulations occurring at the high energy side of the ionisation edges in electron energy loss spectra. This structure turns out to be correlated to the number, distance, and type of nearby atoms as well as the inelastic mean free path for the ejected electrons, and disorder in distances from the excited atom to the atoms in an atomic shell around it. READ MORE