Sökning: "ionisation"

Visar resultat 1 - 5 av 96 avhandlingar innehållade ordet ionisation.

  1. 1. Single-photon multiple ionisation of atoms and molecules investigated by coincidence spectroscopy : Site-specific effects in acetaldehyde and carbon dioxide

    Författare :Sergey Zagorodskikh; Raimund Feifel; Vitali Zhaunerchyk; Melanie Mucke; Maria Novella Piancastelli; Tom Field; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; acetaldehyde; carbon dioxide; xenon; electron correlation; double ionisation; triple ionisation; core-valence ionisation; site-specific Auger decay; multiple Auger decay; branching ratios; site-specific photodissociation; molecular rearrangement; time-of-flight multi-electron-ion coincidence spectroscopy; synchrotron radiation; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : In this thesis, multiple ionisation processes of free atoms and molecules upon single photon absorption are studied by means of a versatile multi-electron-ion coincidence spectroscopy method based on a magnetic bottle, primarily in combination with synchrotron radiation. The latter offered the possibility to access not only valence but also core levels, revealing processes, which promote the target systems into different charge states. LÄS MER

  2. 2. On the Formation and Structure of the Ionosphere of Titan

    Författare :Karin Ågren; Jan-Erik Wahlund; Andrew Nagy; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Titan; Cassini; space physics; ionisation; electron density; ionosphere; negative ions; electric currents; electric fields; solar zenith angle; Langmuir probe; Space and Plasma Physics; Rymd- och plasmafysik;

    Sammanfattning : We present results on the ionospheric structure around Titan observed during numerous deep (.... LÄS MER

  3. 3. On dynamics and thermal radiation of imploding shock waves

    Författare :Malte Kjellander; Nicholas Apazidis; Gabi Ben-Dor; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; converging shock waves; polygonal shock waves; temperature measurments; argon; plasma creation; ionisation; spectrometry; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : Converging cylindrical shock waves have been studied experimentally. Numericalcalculations based on the Euler equations and analytical comparisons basedon the approximate theory of geometrical shock dynamics have been made tocomplement the study.Shock waves with circular or polygonal shock front shapes have been createdand focused in a shock tube. LÄS MER

  4. 4. Theoretical prediction of ionisation properties of proteins

    Författare :Assen Koumanov; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP;

    Sammanfattning : This work emphasises on elaboration of improved theoretical and computational methods for determination of protonation/deprotonation equilibria in proteins. It also aims to contribute for a better understanding on atomic level of ionisation properties of proteins and their role in structure-functional relationship. LÄS MER

  5. 5. Analysis of noncovalent and covalent protein-ligand complexes by electrospray ionisation mass spectrometry

    Författare :Gustav Sundqvist; Harry Brumer; Per Andrén; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; noncovalent complex; droplet fission; nano-electrospray ionisation; mass spectrometry; Analytical chemistry; Analytisk kemi;

    Sammanfattning : In this thesis, the application of electrospray ionisation mass spectrometry (ESI-MS) to the analysis of intact proteins is demonstrated. In papers I and II, the use of ESI-MS for the analysis of noncovalent protein-ligand complexes were discussed. LÄS MER