Quantum dynamics in laser–assisted collisions, laser–molecule interactions, and particle–surface scattering

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dc.contributor.author Niederhausen, Thomas
dc.date.accessioned 2007-05-04T20:26:59Z
dc.date.available 2007-05-04T20:26:59Z
dc.date.issued 2007-05-04T20:26:59Z
dc.identifier.uri http://hdl.handle.net/2097/313
dc.description.abstract The time-dependent Schrödinger equation is integrated on a numerical lattice for up to three-dimensional problems. The wave packet propagation technique has been applied to ion – atom collisions in a strong laser field, the vibrational nuclear motion in small homonuclear diatomic molecular ions, and for the scattering of an ion in front of a metallic surface. For laser-assisted proton – hydrogen collisions it is shown, that strong circularly polarized radiation significantly alters the capture and ionization probabilities and results in a dichroism with respect to the helicity. In a pump – control – probe scheme, “stroboscopic” exposure of a nuclear wave packet of the deuterium molecular ion by a single or a series of short and intense laser control pulses may be used to produce an almost stationary distribution of a single vibrational level, where the nodal structure can be tested using the Coulomb explosion imaging technique. Using a pump – probe setup with variable probe delays it is proposed to use Fourier analysis of the time dependence of the Coulomb explosion kinetic energy release spectrum to reveal insight into the initial vibrational state distribution for small diatomic molecules. A last application demonstrates, that resonant charge transfer for scattering of a negative hydrogen anion on a metal surface depends crucially on the position of surface and image states relative to the conduction and valence band, thereby implying different reaction mechanisms for different surface cuts of a metal. en
dc.language.iso en_US en
dc.publisher Kansas State University en
dc.subject Laser Molecule Interactions en
dc.subject Particle Scattering en
dc.subject Vibrational Dynamics en
dc.subject Laser Assisted Collisions en
dc.subject Quantum Control en
dc.subject Theory en
dc.title Quantum dynamics in laser–assisted collisions, laser–molecule interactions, and particle–surface scattering en
dc.type Dissertation en
dc.description.degree Doctor of Philosophy en
dc.description.level Doctoral en
dc.description.department Department of Physics en
dc.description.advisor Uwe Thumm en
dc.subject.umi Physics, Atomic (0748) en
dc.subject.umi Physics, Molecular (0609) en
dc.subject.umi Physics, Optics (0752) en
dc.date.published 2007 en
dc.date.graduationmonth May en

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