Angular distribution studies on the two-photon ionization of hydrogen-like ions: Relativistic description

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dc.creatorKoval, Peter
dc.creatorFritzsche, Stephan
dc.creatorSurzhykov, Andrey
dc.date2007-05-01
dc.date.accessioned2026-07-07T07:58:56Z
dc.date.available2026-07-07T07:58:56Z
dc.descriptionThe angular distribution of the emitted electrons, following the two-photon ionization of the hydrogen-like ions, is studied within the framework of second order perturbation theory and the Dirac equation. Using a density matrix approach, we have investigated the effects which arise from the polarization of the incoming light as well as from the higher multipoles in the expansion of the electron--photon interaction. For medium- and high-Z ions, in particular, the non-dipole contributions give rise to a significant change in the angular distribution of the emitted electrons, if compared with the electric-dipole approximation. This includes a strong forward emission while, in dipole approxmation, the electron emission always occurs symmetric with respect to the plane which is perpendicular to the photon beam. Detailed computations for the dependence of the photoelectron angular distributions on the polarization of the incident light are carried out for the ionization of H, Xe$^{53+}$, and U$^{91+}$ (hydrogen-like) ions.
dc.description16 pages, 4 figures, published in J Phys B
dc.identifierhttps://arxiv.org/abs/0705.0136
dc.identifierhttp://arxiv.org/abs/0705.0136
dc.identifier2004 J. Phys. B: At. Mol. Opt. Phys. 37, 375-388
dc.identifierdoi:10.1088/0953-4075/37/2/006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128185
dc.subjectAtomic Physics
dc.titleAngular distribution studies on the two-photon ionization of hydrogen-like ions: Relativistic description
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