Search for dissertations about: "molecular clusters"

Showing result 6 - 10 of 255 swedish dissertations containing the words molecular clusters.

  2. 6. Photoelectron Spectroscopy on Atoms, Molecules and Clusters : The Geometric and Electronic Structure Studied by Synchrotron Radiation and Lasers

    Author : Torbjörn Rander; Olle Björneholm; Gunnar Öhrwall; Maxim Tchaplyguine; Matthias Neeb; Uppsala universitet; []
    Keywords : Atomic and molecular physics; Free clusters; Electron spectroscopy; Doped clusters; Laser excitation; Alkali metals; Electronic structure; Geometric structure; X-ray photoelectron spectroscopy XPS ; Resonant Auger spectroscopy RAS ; Near-threshold x-ray absorption fine structure NEXAFS ; Ultraviolet photoelectron spectroscopy UPS ; Detuning; Ultra-fast dissociation UFD ; Sodium; Potassium; Oxygen; Bromomethane; Argon; Xenon; Krypton; Molecular field splitting; Core hole lifetime; Core excitation; Atom- och molekylfysik;

    Abstract : Atoms, molecules and clusters all constitute building blocks of macroscopic matter. Therefore, understanding the electronic and geometrical properties of such systems is the key to understanding the properties of solid state objects. READ MORE

  4. 7. Free Clusters Studied by Synchrotron-Based X-ray Spectroscopy: From Rare Gases to Metals

    Author : Sergey Peredkov; Synkrotronljusfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; supraconductors; magnetic resonance; relaxation; spectroscopy; magnetic and optical properties; rare-gas clusters; Condensed matter:electronic structure; electrical; metal clusters; photoemission; synchrotron radiation; core-level spectroscopy; Auger decay; XPS; nano-particles; free clusters; egenskaper elektriska; spektroskopi; magnetisk resonans; magnetiska och optiska ; supraledare; Kondenserade materiens egenskaper:elektronstruktur;

    Abstract : The main topic of this Thesis is the x-ray spectroscopic studies of free nano-clusters with size more than 10^3 atoms. The photoelectron spectroscopy experiments on rare gas and metal clusters were performed at beamline I411 at MAX-lab National Swedish synchrotron radiation facility. Free rare-gas clusters are simplest objects in cluster research. READ MORE

  5. 8. Studies of Molecular and Cluster Fragmentation Using Synchrotron Radiation: Measurements and Models

    Author : Andreas Lindgren; Synkrotronljusfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Atom- och molekylärfysik; Atomic and molecular physics; photoionization; synchrotron radiation; localized excitation; electron-ion coincidence; induced alignment; clusters; molecules; core excitation; mass spectroscopy; fragmentation; dissociation;

    Abstract : A new spectrometer for studying photoinduced fragmentation has been designed and commissioned. The instrument produces a detailed view of the energy and angular emission of fragments, which in the case of small molecules can be related to their geometry at the moment of dissociation. READ MORE

  6. 9. Ions colliding with molecules and molecular clusters : fragmentation and growth processes

    Author : Tao Chen; Henrik Cederquist; Hutton Roger; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PAH; H2; C60; fragmentation; fysik; Physics;

    Abstract : In this work we will discuss fragmentation and molecular growth processes in collisions of Polycyclic Aromatic Hydrocarbon (PAH) molecules, fullerenes, or their clusters with atoms or atomic ions. Simple collision models as well as molecular structure calculations are used to aid the interpretations of the present and other experimental results. READ MORE

  7. 10. Free Neutral Clusters and Liquids Studied by Electron Spectroscopy and Lineshape Modeling

    Author : Henrik Bergersen; Olle Björneholm; Svante Svensson; Gunnar Öhrwall; Maxim Tchaplyguine; Hans Ågren; Uppsala universitet; []
    Keywords : Physics; Clusters; Nano-particles; XPS; UPS; AES; Radial structure; Molecular dynamics; Density functional theory; Liquids; Liquid microjet; Solvation; Fysik;

    Abstract : The electronic and geometrical structure of free neutral clusters and liquids have been studied using synchrotron-radiation based photoelectron and Auger electron spectroscopy in combination with lineshape modeling. A novel experimental setup has been developed for studies of liquids, based on the liquid microjet technique. READ MORE