104 citations · 424 across the 21 of their papers we have counts for
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Electron correlation effects on the factor of lithiumlike ions
D. V. Zinenko, D. A. Glazov, V. P. Kosheleva +2
We present the systematic QED treatment of the electron correlation effects on the factor of lithiumlike ions for the wide range of nuclear charge number -- . The o…
Nondipole strong-field approximation for above threshold ionization in few-cycle pulse
Danish Furekh Dar, Björn Minneker, Stephan Fritzsche
The ionization of atoms and molecules by strong laser fields has been studied extensively, both theoretically and experimentally. The strong-field approximation (SFA) allows for th…
Multiple Photodetachment of Oxygen Anions via K-Shell Excitation and Ionization: Direct Double-Detachment Processes and Subsequent Deexcitation Cascades
S. Schippers, A. Hamann, A. Perry-Sassmannshausen +6
Experimental cross sections for m-fold photodetachment (m=2-5) of oxygen anions via K-shell excitation and ionization were measured in the photon-energy range of 525-1500 eV using…
QED approach to valence-hole excitation in closed shell systems
R. N. Soguel, A. V. Volotka, S. Fritzsche
An ab initio QED approach to treat a valence-hole excitation in closed shell systems is developed in the framework of the two-time-Green function method. The derivation considers a…
Polarization effects in the total rate of biharmonic ionization of atoms
J. Hofbrucker, S. Ramakrishna, A. V. Volotka +1
The total ionization rate of biharmonic () ionization is studied within the independent particle approximation and the third order perturbation theory. Particular attention…
g Factor of Lithiumlike Silicon and Calcium: Resolving the Disagreement between Theory and Experiment
V. P. Kosheleva, A. V. Volotka, D. A. Glazov +2
The bound-electron g factor is a stringent tool for tests of the Standard Model and the search for new physics. The comparison between an experiment on the g factor of lithiumlike…
Photoexcitation of atoms by cylindrically polarized Laguerre-Gaussian beams
S. Ramakrishna, J. Hofbrucker, S. Fritzsche
We analyze the photo-excitation of atoms with a single valence electron by cylindrically polarized Laguerre-Gaussian beams. Theoretical analysis is performed within the framework o…
Breakdown of the electric dipole approximation at Cooper minima in direct two-photon ionisation
J. Hofbrucker, A. V. Volotka, S. Fritzsche
We predict breakdown of the electric dipole approximation at nonlinear Cooper minimum in direct two-photon shell atomic ionisation by circularly polarised light. According to p…
Plasma-environment effects on K lines of astrophysical interest III. IPs, K thresholds, radiative rates, and Auger widths in Fe ix - Fe xvi
J. Deprince, M. A. Bautista, S. Fritzsche +5
Aims. In the context of black-hole accretion disks, we aim to compute the plasma-environment effects on the atomic parameters used to model the decay of K-vacancy states in moderat…
Two-color above threshold ionization of atoms and ions in XUV Bessel beams and combined with intense laser light
D. Seipt, R. A. Müller, A. Surzhykov +1
The two-color above-threshold ionization (ATI) of atoms and ions is investigated for a vortex Bessel beam in the presence of a strong near-infrared (NIR) light field. While the pho…
Scattering of twisted relativistic electrons by atoms
V. Serbo, I. P. Ivanov, S. Fritzsche +2
The Mott scattering of high-energetic twisted electrons by atoms is investigated within the framework of the first Born approximation and Dirac's relativistic equation. Special emp…
Compton scattering of twisted light: angular distribution and polarization of scattered photons
S. Stock, A. Surzhykov, S. Fritzsche +1
Compton scattering of twisted photons is investigated within a non-relativistic framework using first-order perturbation theory. We formulate the problem in the density matrix theo…
Atomic ionization by twisted photons: Angular distribution of emitted electrons
Oliver Matula, Armen G Hayrapetyan, Valeriy G Serbo +2
We investigate the angular distribution of electrons that are emitted in the ionization of hydrogen-like ions by twisted photons. Analysis is performed based on the first-order per…