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  1. Article

    Open Access

    Testing quantum electrodynamics in extreme fields using helium-like uranium

    Quantum electrodynamics (QED), the quantum field theory that describes the interaction between light and matter, is commonly regarded as the best-tested quantum theory in modern physics. However, this claim is...

    R. Loetzsch, H. F. Beyer, L. Duval, U. Spillmann, D. Banaś, P. Dergham… in Nature (2024)

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  2. Article

    Open Access

    Influence of target material impurities on physical results in relativistic heavy-ion collisions

    This paper presents the studies on the influence of the target material impurities on physical observables measured in heavy-ion collisions collected by fixed target experiments. It mainly concerns the measure...

    D. Banaś, A. Kubala-Kukuś, M. Rybczyński, I. Stabrawa… in The European Physical Journal Plus (2019)

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  3. No Access

    Article

    Differential L-shell radiative recombination rate coefficients for bare uranium ions interacting with low-energy electrons

    Results of the calculations of differential L−shell radiative recombination (RR) rate coefficients for bare uranium ions colliding with free electrons using the nonrelativistic dipole approximation and fully rela...

    D. Banaś, M. Pajek, A. Gumberidze… in The European Physical Journal Special Topi… (2013)

  4. No Access

    Article

    Precision studies of fundamental atomic structure with heaviest few-electron ions

    One- and few-electron ions traditionally serve as an important testing ground for fundamental atomic structure theories and for the effects of QED, relativity and electron correlation. In the domain of high nu...

    A. Gumberidze, Th. Stöhlker, D. Banaś, H. F. Beyer, C. Brandau… in Hyperfine Interactions (2011)

  5. No Access

    Article

    Spectral distribution of the 2S →1 S two-photon transition in atoms and few-electron ions

    The two-photon decay of the 2S state to the ground state in dressed atoms and one- or two-electron ions has been studied for several decades. Relativistic calculations have shown an Z-dependence of the spectral s...

    AJAY KUMAR, S TROTSENKO, A V VOLOTKA, D BANAŚ, H F BEYER, H BRÄUNING… in Pramana (2011)

  6. No Access

    Article

    High-resolution X-ray study of the multiple ionization of Pd atoms by fast oxygen ions

    The multiple ionization of the L- and M-shells of Pd by fast oxygen ions has been studied by measuring with high-resolution the satellite structures of the Lα1,2 X-ray transitions. Relativistic multi-configuratio...

    M. Czarnota, D. Banaś, M. Berset, D. Chmielewska… in The European Physical Journal D (2010)

  7. No Access

    Article

    Polarization and angular correlation studies of X-rays emitted in relativistic ion-atom collisions

    Particle and photon polarization phenomena occurring in collisions of relativistic ions with matter have recently attracted particular interest. Investigations of the emitted characteristic x-ray and radiative...

    Th. Stöhlker, D. Banaś, H. Bräuning… in The European Physical Journal Special Topi… (2009)

  8. No Access

    Article

    The enhancement effect in K-shell radiative recombination of \(\mbox{\sffamily\bfseries U}^{\hbox{\sffamily\bfseries\fontsize{10}{12}\selectfont 92+}}\) ions with cooling electrons

    We report the results of the x-ray radiative recombination (RR) experiment at the electron cooler of the ESR storage ring performed, for the first time, for detuned (off-cooling) electron energies. In this exp...

    D. Banaś, M. Pajek, Th. Stöhlker… in The European Physical Journal Special Topi… (2009)

  9. No Access

    Article

    Spectral shape of the 2E1 decay from 2s state in He-like tin

    The two-photon 2E1 transition from the singlet 2s state of heliumlike tin was measured. An alternative experimental approach was adopted in the present investigation where the two-photon emission results from ...

    A. Kumar, S. Trotsenko, A. V. Volotka… in The European Physical Journal Special Topi… (2009)