Search for dissertations about: "interaction of atomic ions"

Showing result 1 - 5 of 47 swedish dissertations containing the words interaction of atomic ions.

2. 1. Interaction of atomic ions with electrons : Recombination rate coefficients for C1+, F5+, Ne5+, S14+,S15+

   Author : Sultan Mahmood; Reinhold Schuch; Christoph Biedermann; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

   Abstract : This thesis concentrates on electron-ion interaction studies, in particular focusing on dielectronic recombination (DR) of highly charged ions relevant to astrophysics and plasma physics. The measurements were performed at the Stockholm Refrigerated Electron Beam Ion Trap (R-EBIT) and at the CRYRING heavy-ion storage ring. READ MORE

4. 2. Theoretical Atomic Spectroscopy of Earthbound and Stellar Plasma

   Author : Jon Grumer; Matematisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; atomstruktur; atomära processer; elektronkorrelation; plasmaspektroskopi; magnetfält; hyperfinstruktur; solkoronan; rymdväder; förekomst av grundämnen i stjärnor; datorsimuleringar; Zeemaneffekt; relativistiska effekter; atomic structure; atomic processes; computer simulation; electron correlation; relativistic atomic theory; plasma spectroscopy; Zeeman effect; magnetic fields; hyperfine structure; solar corona; space weather; stellar abundances; Fysicumarkivet A:2016:Grumer;

   Abstract : Motivated by spectroscopic analysis of astrophysical and laboratory plasma, this thesis concerns the fundamental structure and spectral properties of atoms and their ions. The multiconfiguration Dirac-Hartree-Fock (MCDHF) method is used to predict the emission or absorption of radiation, by atomic systems in general, and of heavy and highly charged ions in particular. READ MORE

5. 3. DFT calculations of initial localized corrosion of aluminum : Influence of aqueous ad-layer, chloride ions, and intermetallic particles

   Author : Min Liu; Jinshan Pan; Ying Chen; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; aluminum alloys; alumina; chloride; surface adsorption; aqueous ad-layer; localized corrosion; corrosion initiation; work function; micro-galvanic effect; density-functional theory; Volta potential; scanning kelvin probe force microscopy; Kemi; Chemistry;

   Abstract : Localized corrosion of aluminum (Al, here including Al alloys) involves a series of physico-chemical processes at the interface between the metal and the aqueous ad-layer or the aqueous solution. The mechanisms that govern localized corrosion are quite complex and have been the subject of many experimental studies. READ MORE

6. 4. 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

7. 5. Weak Atomic Interactions

   Author : Peter Schef; Sven Mannervik; Juliet C. Pickering; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; metastable states; forbidden transitions; laser probing; hyperfine structure; LRDR; Atomic physics; Atomfysik;

   Abstract : An atom or ion can change quantum state, usually through emission or absorption of a photon. The photon has the same energy as the energy difference between the states of the transition. The states, or energy levels, of an atom are quantized and light emitted, or absorbed, from the atom is therefore of specific wavelengths, giving spectral lines. READ MORE