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Visar resultat 1 - 5 av 6 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Ultrafast dynamics of small quantum systems studied using electron-ion coincidence spectroscopy

    Författare :Smita Ganguly; Synkrotronljusfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coincidence spectroscopy; photodissociation dynamics; fragmentation reaction; MOLECULAR-BEAM; Cluster fission; Astrochemistry; Carbon dioxide CO2 ; ; Adamantane;

    Sammanfattning : Studying how small quantum systems, like molecules and clusters, interact with X-rays is crucial to understanding the ultrafast processes that occur in nature on incredibly short timescales, ranging from femtoseconds to picoseconds. X-rays excite small quantum systems to unstable core hole states, leading to a cascade of phenomena, including Auger decay, nuclear rearrangement, and dissociation. LÄS MER

  3. 2. Charge and proton dynamics in molecules and free clusters : from atomic to nanometer scale

    Författare :Bart Oostenrijk; Synkrotronljusfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Charge transfer; Electron-Ion coincidence; proton hopping; Coulomb explosion; Cluster fission; site-selective dissociation; Molecular photodissociation; spectroscopy; Fysicumarkivet A:2018:Oostenrijk;

    Sammanfattning : The origin of properties in complex systems can often be traced to mechanisms involving charge and energy transfer in only a few embedded molecules. The detailed study of the time evolution of these mechanisms in their original environment is a challenging task. LÄS MER

  4. 3. Influence of Nuclear Structure on Decay Properties of Heavy Nuclei

    Författare :Daniel Ward; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; alpha decay; hindrance factors; Skyrme-Hartree-Fock-Bogoliubov model; superheavy nuclei; fission yields; Brownian-shape motion; nuclear structure; nuclear level density; alpha decay; hindrance factors; Skyrme-Hartree-Fock-Bogoliubov model; superheavy nuclei; fission yields; Brownian-shape motion; nuclear structure; nuclear level density; Fysicumarkivet A:2017:Ward;

    Sammanfattning : This dissertation deals with the effects of nuclear structure on the α-decay properties, and on the fission-yielddistributions from the decay of heavy nuclei. The nuclear-structure and decay properties of superheavynuclei is one of the central topics for investigation. LÄS MER

  5. 4. Molecular mechanisms controlling dynamin recruitment to sites of endocytosis by SH3-domain containing proteins

    Författare :Anna Sundborger; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Endocytosis is a general cellular mechanism, which regulates a number of important events, including recycling of synaptic vesicles. Clathrin-mediated endocytosis is the best-characterized endocytic pathway in the cell. This internalization process involves the coat protein clathrin, the adaptor protein AP2 and a number of accessory proteins. LÄS MER

  7. 5. Coordination of endocytosis at the synaptic periactive zone

    Författare :Emma Evergren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Synapse; endocytosis; clathrin; dynamin; amphiphysin; synapsin; intersectin; actin cytoskeleton; immunogold electron microscopy.;

    Sammanfattning : Neurons in the central nervous system communicate via specialized junctions called synapses. Neurotransmitter-filled vesicles are clustered at these junctions, where they are released in response to synaptic activity. To sustain reliable neurotransmission the synaptic vesicles are recycled locally. LÄS MER