Sökning: "wavepacket"

Visar resultat 6 - 10 av 11 avhandlingar innehållade ordet wavepacket.

  1. 6. Curve-crossing quantum wavepacket dynamics - Experiment and theory

    Författare :Niklas Gador; KTH; []
    Nyckelord :physical chemistry; molecular;

    Sammanfattning : In this thesis, I present experimental and theoretical workon quantum wavepacket dynamics in potential curve-crossings,using gas-phase Rb2 as working media. Particularly, we havefocused on curve-crossing cases with intermediate strengthcoupling, which leads to complicated wavepacket motion withe.g. large splittings and interference. LÄS MER

  3. 7. Desorption induced by electronic transitions : a study with quantum mechanical wavepacket propagation

    Författare :Carl Johan Setterlind; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; desorption induced by electronic transitions; Menzel-Gomer-Redhead; surfaces; wavepackets; reneutralization;

    Sammanfattning : .... LÄS MER

  4. 8. Ultrafast Photo-induced Reaction Dynamics of Small Molecules

    Författare :Malin Kadi; Jan Davidsson; Eva Åkesson; Sören Keiding; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; pump-probe spectroscopy; reaction dynamics; photodissociation; aryl halides; spin-orbit coupling; ab initio calculations; molecular dynamics; vibrational wavepackets; Fysikalisk kemi; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : The main focus of this thesis is the investigation of the dissociation dynamics of aryl halides using femtosecond pump-probe spectroscopy. In the monohalogenated aryl halides, iodo-, bromo- and chlorobenzene, the rate of dissociation following excitation at 266 nm in the gas phase increased with increasing mass of the halogen atom. LÄS MER

  5. 9. Quantum interference effects in attosecond photoionization dynamics

    Författare :David Busto; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attosecond; Photoionization; Interferometry;

    Sammanfattning : The interaction of extreme ultraviolet light with matter can lead to the emission of an electron in a process known as photoionization. The electron wavepacket (EWP) created in the continuum propagates on the ionic potential, resulting in a delay compared to an EWP propagating freely. LÄS MER

  7. 10. Studies of Ultrafast Relaxation and Photodissociation Processes in Solution

    Författare :Peter Salén; Peter van der Meulen; Jan Davidsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ultrafast spectroscopy; liquid phase; Physics; Fysik;

    Sammanfattning : This thesis focuses on femtosecond studies of relaxation and photo-induced dissociation processes in the liquid environment. Measurements are performed using both polarization sensitive and magic angle transient absorption spectroscopy with excitation wavelengths of 387 nm and 258 nm and a white light continuum probe. LÄS MER