Sökning: "Laser Photodetachment Spectroscopy"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Laser Photodetachment Spectroscopy.

  1. 1. Laser Photodetachment of Negative Ions - Fundamental Research and Applications

    Författare :Pontus Andersson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Negative Ions; Laser Spectroscopy; Photodetachment; Electron Affinity; Mass Spectrometry; Radiative Lifetime; Storage Rings; Mass Spectrometry;

    Sammanfattning : Photodetachment studies of atomic and molecular negative ions in the gas phase are presented. Negative ions are loosely bound quantum systems whose existence is strongly dependent on the correlations between the electrons. LÄS MER

  3. 2. Spectroscopy of Stable and Radioactive Negative Ions

    Författare :Annie Ringvall-Moberg; Göteborgs universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  4. 3. Spectroscopic studies of the negative state of atoms

    Författare :Jakob Welander; Göteborgs universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  7. 5. Precise measurements of electron affinities using Laser Photodetachment Threshold Spectroscopy

    Författare :Jose Eduardo Navarro Navarrete; Henning Zettergren; Henning T. Schmidt; Jan-Erik Rubensson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning :  In this work we have performed Laser Photodetachment Threshold Spectroscopy (LPTS) to determine the electron affinities of the atomic species $^{133}$Cs and $^{16}$O with high precision. The negative ion of Cesium has been produced and investigated at the Gothenburg University Negative Ion and Laser LAboratory (GUNILLA) while the Oxygen anion have been studied in the Double ElectroStatic Ion Ring ExpEriment (DESIREE) at Stockholm University. LÄS MER