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dc.contributor.authorAbeln, Brant
dc.contributor.authorWeflen, Daniel
dc.contributor.authorGrum-Grzhimailo, Alexei
dc.descriptionAdvisor: Klaus Bartschaten_US
dc.description.abstractWe have studied the multi-photon ionization of atomic hydrogen by an intense attosecond laser pulse. We numerically integrate the time-dependent Schrodinger equation by propagating the initial H(1s) state after the onset of the laser pulse using the Crank-Nicolson algorithm. When the pulse is over, we extract the angular distribution of the ejected electrons from the time-propagated wavefunction. For few-cycle 800 nm laser pulses of peak intensities ranging between 1013 and 1015 W/cm2, the photoelectron spectrum is dominated by a set of above-threshold resonances, with the lowest resonance around 0.35 eV corresponding to the nine-photon ionization of the hydrogen atom. In contrast to the standard single-photon ionization process, where the angular distribution is a simple cos2(0) function, many more anisotropy parameters need to be accounted for to describe the ejected photo-electrons. Corresponding experiments are currently being performed in Brisbane (Australia) on hydrogen and Heidelberg (Germany) on Li. Where possible, comparison with experimental data will be made.en_US
dc.description.sponsorshipDrake University, College of Arts and Sciences, Department of Physics and Astronomy ; Institute of Nuclear Physics, Moscow State Universityen_US
dc.relation.ispartofseriesDUCURS 2009;11
dc.subjectAtomic hydrogenen_US
dc.subjectLaser pulses, Ultrashorten_US
dc.subjectAngular distribution (Nuclear physics)en_US
dc.titleEjected-Electron Angular Distribution in Multi-Photon Ionization of Atomic Hydrogen by Ultrashort High-Intensity Laser Pulsesen_US

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  • DUCURS [196]
    Poster sessions and presentation from the Drake University Conference on Undergraduate Research in the Sciences held each April at Olmsted Center on the Drake campus.

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