Sökning: "gas-phase"

Visar resultat 11 - 15 av 365 avhandlingar innehållade ordet gas-phase.

1. 11. Gas phase molecular relaxation probed by synchrotron radiation experiments

   Författare :Jaume Rius i Riu; KTH; []
   Nyckelord :Molecular relaxation; synchrotron radiation; dispersed fluorescence; photoelectron spectroscopy; energy resolved electron ion coincidence technique;

   Sammanfattning : This thesis presents experimental studies of gas phasemolecular relaxation after excitation with synchrotron photonsin the 15-35 eV and in the 70-350 eV regions.In the 15-35 eV region, molecular relaxation by neutraldissociation processes and nonFranck-Condon effects in N2 and O2 molecules have beenstudied by means of dispersed fluorescence and photoelectronspectroscopy experimental techniques, respectively. LÄS MER

3. 12. A cryogradient sampling system for chemical analysis of polycyclic aromatic compounds (PAC) : studies of the gas phase-emitted PAC from automobiles

   Författare :Roger Westerholm; Stockholms universitet; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER

4. 13. Operando Gas Imaging in Heterogeneous Catalysis

   Författare :Jianfeng Zhou; Förbränningsfysik; []
   Nyckelord :planar laser-induced fluoresence; degenerate four wave mixing; gas phase; CO oxidation; model catalyst; hetergeneous catalysis; laser-diagnostiska tekniker; gasfasdetektering; modellkatalys; heterogen katalys;

   Sammanfattning : This thesis deals with the development and application of laser-based techniques, for gas phasecharacterization/gas imaging in heterogeneous catalysis. Two techniques are presented: planar laser-induced fluorescence (PLIF) and degenerate four wave mixing (DFWM). LÄS MER

5. 14. X-ray Absorption and Fragmentationas Initial Steps of Radiation Damage in Free Organic Molecules and Nanoparticles

   Författare :Abdul Rahman Abid; Minna Patanen; Olle Björneholm; Juha Nikkinen; Laurent Nahon; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coincidence spectroscopy; PEPI PI CO; electron spectroscopy; X-ray absorption spectroscopy; mass spectrometry; photodissociation; gas-phase; liquids; nanoparticles; charge transfer; synchrotron radiation; Fysik; Physics; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Sammanfattning : Understanding the molecular radiation damage is crucial in radiobiology, molecular physics, and atmospheric science. In this thesis, the initial steps of radiation damage of anhydrous gas-phase molecules and hydrated nanoparticles were studied using synchrotron radiation based electron-ion coincidence spectroscopy and X-ray absorption spectroscopy under vacuum conditions. LÄS MER

7. 15. Synchrotron radiation study of free and adsorbed organic molecules

   Författare :Teng Zhang; Carla Puglia; Nils Mårtensson; Svante Svensson; Mats Götelid; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Synchrotron radiation; Phthalocyanine; Cobalt phthalocyanine; Biphenylene; Functional materials; CoPc; Photoemission spectroscopy; Absorption spectroscopy; PES; XAS; Electronic structure; Gas phase; film; Organic molecule;

   Sammanfattning : In this licentiate thesis, organic molecules, namely Cobalt Phthalocyanine (CoPc) and Biphenylene, have been studied by means of synchrotron radiation-based spectroscopic methods (Photoemission Spectroscopy (PES) and X-ray Absorption Spectroscopy (XAS) in combination with Density Functional Theory (DFT) calculations.Paper I is a combined experimental and theoretical investigation of electronic structure of CoPc. LÄS MER