30 citations · 226 across the 19 of their papers we have counts for
19 papers
Testing strong-field QED to second-order in the highly correlated atomic system berylliumlike Pb78+ by electron-ion recombination spectroscopy
S. Schippers, C. Brandau, S. Fuchs +33
A low-energy storage ring with an ultracold electron cooler has been coupled with a heavy-ion accelerator facilitating high-resolution electron-ion collision spectroscopy of the he…
Atomic photoexcitation as a tool for probing purity of twisted light modes
R. P. Schmidt, S. Ramakrishna, A. A. Peshkov +4
The twisted light modes used in modern atomic physics experiments can be contaminated by small admixtures of plane wave radiation. Although these admixtures hardly reveal themselve…
Enhanced polarization transfer to the characteristic x-ray lines near the nonlinear Cooper minimum of two-photon ionization
J. Hofbrucker, A. V. Volotka, J. Szlachetko +1
It has been shown that for nonlinear atomic ionization, transfer of the degree of circular polarization from incident to fluorescence light is maximum at the Cooper minimum (see Ph…
Rayleigh scattering of a linearly polarized light: scenario of the complete experiment
A. V. Volotka, A. Surzhykov, S. Fritzsche
The process of the elastic scattering of photons on atoms, known as the Rayleigh scattering, is investigated. Expressing the scattering observables in terms of the electric and mag…
Fluorescence polarization as a precise tool for understanding nonsequential many-photon ionization
J. Hofbrucker, A. V. Volotka, S. Fritzsche
Nonsequential two-photon ionization of inner-shell subshell of neutral atoms by circularly polarized light is investigated. Detection of subsequent fluorescence as a signature…
Ground-state hyperfine splitting of B-like ions in high-Z region
D. A. Glazov, A. V. Volotka, O. V. Andreev +5
The hyperfine splitting of the ground state of selected B-like ions within the range of nuclear charge numbers is investigated in detail. The rigorous QED approach togeth…
Maximum Elliptical Dichroism in Atomic Two-Photon Ionization
J. Hofbrucker, A. V. Volotka, S. Fritzsche
Elliptical dichroism is known in atomic photoionization as the difference in the photoelectron angular distributions produced in nonlinear ionization of atoms by left- and right-ha…
Angle-resolved x-ray spectroscopic scheme to determine overlapping hyperfine splittings in highly charged helium-like ions
Z. W. Wu, A. V. Volotka, A. Surzhykov +1
An angle-resolved x-ray spectroscopic scheme is presented for determining the hyperfine splitting of highly charged ions. For helium-like ions, in particular, we propose to measure…
Theoretical analysis of the electron bridge process in Th
Robert A. Müller, Andrey V. Volotka, S. Fritzsche +1
We investigate the deexcitation of the Th nucleus via the excitation of an electron. Detailed calculations are performed for the enhancement of the nuclear decay width due…
Nuclear excitation by two-photon electron transition
A. V. Volotka, A. Surzhykov, S. Trotsenko +3
A new mechanism of nuclear excitation via two-photon electron transitions (NETP) is proposed and studied theoretically. As a generic example, detailed calculations are performed fo…
Electric dipole polarizabilities of Rydberg states of alkali atoms
V. A. Yerokhin, S. Y. Buhmann, S. Fritzsche +1
Calculations of the static electric-dipole scalar and tensor polarizabilities are presented for two alkali atoms, Rb and Cs, for the , , and stat…
Level sequence and splitting identification of closely-spaced energy levels by angle-resolved analysis of the fluorescence light
Z. W. Wu, A. V. Volotka, A. Surzhykov +2
The angular distribution and linear polarization of the fluorescence light following the resonant photoexcitation is investigated within the framework of the density matrix and sec…
Many-electron effects on the x-ray Rayleigh scattering by highly charged He-like ions
A. V. Volotka, V. A. Yerokhin, A. Surzhykov +2
The Rayleigh scattering of x-rays by many-electron highly charged ions is studied theoretically. The many-electron perturbation theory, based on a rigorous quantum electrodynamics…
Target effects in negative-continuum assisted dielectronic recombination
V. A. Yerokhin, A. N. Artemyev, V. M. Shabaev +3
The process of recombination of a quasi-free electron into a bound state of an initially bare nucleus with the simultaneous creation of a bound-electron--free-positron pair is inve…
Relativistic calculations of double -shell photoionization for neutral medium- atoms
V. A. Yerokhin, A. Surzhykov, S. Fritzsche
Fully relativistic calculations are presented for the double -shell photoionization cross section for several neutral medium- atoms, from magnesium () up to silver ($…
Relativistic configuration-interaction calculation of transition energies in beryllium-like argon
V. A. Yerokhin, A. Surzhykov, S. Fritzsche
Relativistic configuration-interaction calculations have been performed for the energy levels of the low-lying and core-excited states of beryllium-like argon, Ar. These ca…
Relativistic configuration-interaction calculation of transition energies in beryllium-like iron
V. A. Yerokhin, A. Surzhykov, S. Fritzsche
We perform relativistic configuration-interaction calculations of the energy levels of the low-lying and core-excited states of beryllium-like iron, Fe. The results include…
Electron loss of fast heavy projectiles in collision with neutral targets
V. I. Matveev, S. V. Ryabchenko, D. U. Matrasulov +3
The multiple electron loss of heavy projectiles in fast ion-atom collisions has been studied in the framework of the sudden perturbation approximation. Especially, a model is devel…
Polarization studies on the two-step radiative recombination of highly-charged, heavy ions
A. V. Maiorova, A. Surzhykov, S. Tashenov +4
The radiative recombination of a free electron into an excited state of a bare, high-Z ion is studied, together with its subsequent decay, within the framework of the density matri…