Sökning: "time-resolved x-ray spectroscopy"

Visar resultat 21 - 25 av 36 avhandlingar innehållade orden time-resolved x-ray spectroscopy.

  1. 21. Non-linear Spectroscopy of Conical Intersections

    Författare :Deependra Jadoun; Markus Kowalewski; Eva Lindroth; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kemisk fysik; Chemical Physics;

    Sammanfattning : Conical Intersections (CIs) in a molecule originate from the breakdown of the Born-Oppenheimer approximation when electronic states come close in energy. Ultrafast non-radiative decay channels open up in the vicinity of a CI, thus funneling a molecule from one electronic state to another. LÄS MER

  3. 22. Non-invasive optical monitoring of free and bound oxygen in humans

    Författare :Emilie Krite Svanberg; Anestesiologi och intensivvård; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Intensive care; oxygenation; free gas; near-infrared spectroscopy; absorption spectroscopy; scattering;

    Sammanfattning : Background: Possibilities of detecting oxygen - both in its free form, as gas in the lungs, and in its bound form, as oxygenated hemoglobin - have been explored in this thesis. Perfusion and oxygenation of vital organs (e.g. LÄS MER

  4. 23. Excited state dynamics in low-dimensional perovskite nanocrystals

    Författare :Weihua Lin; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Two-dimensional perovskite; Ultrafast spectroscopy; Single crystal; Nanocrystals; Hot carrier cooling;

    Sammanfattning : Two-dimensional (2D) perovskites have emerged as promising building blocks for optoelectronic applications. To fabricate high-performance devices, the relation between the material structures and their function in terms of excited state and charge carrier dynamics need to be well understood. LÄS MER

  5. 24. Non-linear attosecond physics at 100 eV

    Författare :Alexander Muschet; Laszlo Veisz; Piotr Matyba; Per Eng-Johnsson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; extreme ultraviolet XUV ; non-linear XUV – matter interaction; high-harmonic generation; photoionization; attosecond physics; isolated attosecond pulses; attosecond XUV pump – XUV probe spectroscopy; fysik; Physics;

    Sammanfattning : Non-linear interactions between light and matter have nowadays a broad range of applications. They are used for frequency doubling in simple laser pointers as well as for a variety of purposes in complex laser systems like the one presented in this thesis. LÄS MER

  7. 25. Characterization of membrane protein active transport under native-like conditions

    Författare :Harsha Ravishankar; Magnus Andersson; Pål Stenmark; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biological Physics; Biologisk fysik;

    Sammanfattning : P-type ATPase proteins are a family of membrane proteins that maintain concentration gradients of e.g. ions by ATP-driven transport across the membrane. While these transporters share many features in their molecular architecture, structural differences are required to convey ion specificity. LÄS MER