A5083483976- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Chemical Physics Studies
- Ion-surface interactions and analysis
- Nuclear physics research studies
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Laser-induced spectroscopy and plasma
- Electron and X-Ray Spectroscopy Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Crystallography and Radiation Phenomena
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Atomic and Subatomic Physics Research
- Diamond and Carbon-based Materials Research
- Radiation Detection and Scintillator Technologies
- Quantum Chromodynamics and Particle Interactions
- Radioactive element chemistry and processing
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Luminescence Properties of Advanced Materials
- Electron Spin Resonance Studies
- Quantum, superfluid, helium dynamics
- High-pressure geophysics and materials
- Advanced X-ray and CT Imaging
Jagiellonian University
2013-2024
Institute of Physics
2012-2023
Czech Academy of Sciences, Institute of Physics
2020
Institute of Nuclear Physics, Polish Academy of Sciences
2008
Cracow University of Technology
1995-2005
GSI Helmholtz Centre for Heavy Ion Research
1981-1997
University School of Physical Education in Kraków
1997
University of Agriculture in Krakow
1997
Research Association for Combustion Engines
1986-1995
Technical University of Darmstadt
1978-1984
The process of radiative electron capture (REC) in relativistic collisions high-Z ions with low-Z gaseous and solid targets is studied experimentally theoretically. observed x-ray spectra are analyzed respect to photon angular distributions as well total K-REC cross sections. experimental results for angle-differential sections reproduced by exact calculations which yield significant deviations from standard ${\mathrm{sin}}^{2}$\ensuremath{\theta} distributions. Total shown follow a simple...
The Lyman- alpha transitions of hydrogenlike uranium associated with electron capture were measured in collisions stored bare U (92+) ions gaseous targets at the storage ring ESR. By applying deceleration technique, experiment was performed slow collision energies order to reduce uncertainties Doppler corrections. From centroid energies, a ground state Lamb shift 468 eV+/-13 eV is deduced which gives most precise test quantum electrodynamics for single system strong field regime. In...
Charge-exchange cross sections and beam lifetimes are studied for decelerated bare uranium ions at the ESR storage ring. By deceleration from initial energy of 358 MeV/u down to various energies as low 49 MeV/u, i.e., far below production ionic species, electron pickup were obtained collisions with ${\mathrm{N}}_{2}$, Ar, ${\mathrm{CH}}_{4},$ Kr gaseous targets. The measured compared theoretical results radiative nonradiative capture. present data, along approximations discussed, provide a...
In high-energy atomic collisions between bare high- $Z$ projectiles and low- target atoms, an electron may be captured radiatively into excited projectile state which subsequently decays by x-ray emission. This process is the inverse of two-photon--one-electron ionization, in first photon resonantly excites from hydrogenic ${1s}_{1/2}$ ground a second ionizes electron. We present experimental theoretical study angular distribution Ly- ${\ensuremath{\alpha}}_{1}$ (...
Electron-electron interaction is studied in the strongest possible atomic fields $(Z\ensuremath{\alpha}\ensuremath{\Rightarrow}1)$ presence of only two electrons. A quasifree electron from a hydrogen gas target resonantly captured into an ${L}_{j}$ subshell fast H-like ${\mathrm{U}}^{91+}$ ion by simultaneous excitation strongly bound $K$ also ${L}_{{j}^{\ensuremath{'}}}$ projectile, with $j$ and ${j}^{\ensuremath{'}}$ total angular momenta 1/2 or 3/2 for concern. This resonant transfer...
Radiative recombination transitions into the ground state of cooled bare and hydrogenlike uranium ions were measured at storage ring ESR. By comparing corresponding x-ray centroid energies, this technique allows for a direct measurement electron-electron contribution to ionization potential in heaviest He-like ions. For two-electron we obtain value 2248+/-9 eV. This represents most accurate determination effects domain high-Z ions, accuracy reaches already size specific radiative QED corrections.
The $K$-shell photoelectric effect for a hydrogenlike ${\mathrm{U}}^{91+}$ ion is studied by its time-reversed process occurring in relativistic collisions between bare uranium ions and low- $Z$ target atoms. In the situation, an electron captured into $1s$ ground state with simultaneous emission of photon. We present angular differential study these transitions laboratory observation angles nearly 0\ifmmode^\circ\else\textdegree\fi{} 150\ifmmode^\circ\else\textdegree\fi{}. Our photon close...
The photon angular distributions for radiative electron capture (REC) into the $j=\frac{1}{2}$ and $j=\frac{3}{2}$ $L$ subshell levels were measured calculated ${\mathrm{U}}^{90+}$ \ensuremath{\rightarrow} C collisions at 89 MeV/u. experiment provides first study of distribution REC a projectile $p$ state ($j=\frac{3}{2}$) which was found to exhibit slight backward peaking in laboratory frame. For states, deviates considerably from symmetry around 90\ifmmode^\circ\else\textdegree\fi{}....
Multielectron capture processes observed in low energy collisions of bare ions with target atoms open insight into electron correlations electromagnetic fields. Radiative double (RDEC) provides the simplest tool for investigation such processes. Here, experimental observation RDEC process ${\mathrm{O}}^{8+}$ thin carbon films is presented and cross section value obtained compared recent theoretical calculations.
Radiative electron capture, the time-reversed photoionization process occurring in ion-atom collisions, provides presently only access to studies for very highly charged ions. By applying deceleration mode of ESR storage ring, we studied this low-energy collisions bare uranium ions with low- Z target atoms. This technique allows us extend current information about much lower energies than those accessible neutral heavy elements direct reaction channel. The results prove that high- systems,...
The formation of excited projectile states via Coulomb excitation is investigated for hydrogenlike and heliumlike bismuth projectiles $(Z=83)$ in relativistic ion-atom collisions. process was unambiguously identified by observing the radiative decay levels to vacant $1s$ shell coincidence with ions that did not undergo charge exchange reaction target. In particular, owing large fine-structure splitting Bi, cross sections various $L$-shell sublevels are determined separately. results compared...
An experiment has been performed at the Gesellschaft f\"ur Schwerionenforschung accelerator facility using a beam-foil time-of-flight technique with newly developed chemical vapor deposition diamond particle detector to measure lifetime of $2{}^{3}{P}_{0}$ state, $\ensuremath{\tau}(2{}^{3}{P}_{0}),$ two-electron ion ${}^{197}{\mathrm{Au}}^{77+}$ (He-like gold) result $\ensuremath{\tau}(2{}^{3}{P}_{0})=22.16(0.81)$ ps. The mechanism for decay this state is by hyperfine-induced radiative...
Recent photon correlation studies for Radiative Electron Capture into high-Z projectiles are reviewed. Emphasis is given to the investigation of polarization phenomena which now accessible due recent developments in position sensitive solid-states detectors. It shown, that REC may provide a tool diagnostics and detection spin–polarization particles involved atomic collisions. Also impact structure outlined. Here strong alignment excited states induced by allowed us observe an interference...
We have studied the $K$-shell excitation of He-like uranium (${\mathrm{U}}^{90+}$) in relativistic collisions with hydrogen and argon atoms. Performing measurements different targets, as well collision energies, enabled us to explore proton- (nucleus-) impact electron-impact process for heaviest ion. The large fine-structure splitting allowed partially resolve into $L$-shell levels. State-of-the-art calculations which include mechanisms due interaction both protons (nucleus) electrons are...
For He-like uranium, a state-selective electron-capture study was carried out for relativistic collisions with gaseous targets. In the experiment, projectile x-ray emission produced by electron capture in of 223-MeV/u ${\mathrm{U}}^{90+}$ ions on ${\mathrm{N}}_{2},$ Ar, Kr, and Xe targets measured coincidence ${\mathrm{U}}^{89+}$ projectiles. Due to large fine-structure splitting heavy ions, well-resolved Balmer transitions observed were used deduce subshell sensitive cross sections capture....
We have measured the alignment of L-shell magnetic-substates following K-shell excitation hydrogen- and helium-like uranium in relativistic collisions with a low-Z gaseous target. Within this experiment population distribution for magnetic sublevels has been obtained via an angular differential study decay photons associated subsequent de-excitation process. The results show very distinctive behavior H- He-like heavy systems. In particular $K \rightarrow L$ uranium, considerable levels was...