A5079182993- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Molecular Physics
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- X-ray Diffraction in Crystallography
- Mass Spectrometry Techniques and Applications
- Nuclear physics research studies
- Integrated Circuits and Semiconductor Failure Analysis
- Solar and Space Plasma Dynamics
- Metal and Thin Film Mechanics
- Laser-induced spectroscopy and plasma
- Advanced X-ray Imaging Techniques
- Crystallography and Radiation Phenomena
- Ionosphere and magnetosphere dynamics
- Muon and positron interactions and applications
- Radioactivity and Radon Measurements
- Atomic and Subatomic Physics Research
- Nonlinear Optical Materials Studies
- GaN-based semiconductor devices and materials
- Magnetic Properties of Alloys
- Gold and Silver Nanoparticles Synthesis and Applications
- Methane Hydrates and Related Phenomena
- Astro and Planetary Science
Jan Kochanowski University
2009-2024
École Normale Supérieure - PSL
2023
Sorbonne Université
2023
Université Paris Sciences et Lettres
2023
Laboratoire Kastler Brossel
2023
Institut des NanoSciences de Paris
2023
Centre National de la Recherche Scientifique
2023
GSI Helmholtz Centre for Heavy Ion Research
2023
Goethe University Frankfurt
2023
Friedrich Schiller University Jena
2023
Abstract Quantum electrodynamics (QED), the quantum field theory that describes interaction between light and matter, is commonly regarded as best-tested in modern physics. However, this claim mostly based on extremely precise studies performed domain of relatively low strengths atoms ions 1–6 . In realm very strong electromagnetic fields such heaviest highly charged (with nuclear charge Z ≫ 1), QED calculations enter a qualitatively different, non-perturbative regime. Yet, corresponding...
We present the first observation of 1s2p 3P2→1s2s 3S1 transition in He-like uranium. The experiment was performed at internal gas-jet target ESR storage ring GSI exploiting a Bragg crystal spectrometer and germanium solid-state detector. Using 1s22p 2P3/2→1s22s 2S1/2 Li-like uranium as reference deceleration capabilities ring, we obtained evaluation energy an intra-shell for heavy ion.
The experimental investigation of quantum-electrodydamic contributions to the binding energies inner shells highly charged heavy ions requires an accurate spectroscopy in region hard x-rays suitable at a limited source strength. For this purpose focusing compensated asymmetric Laue crystal optics has been developed and twin-spectrometer assembly built commissioned storage ring GSI Helmholtzzentrum Darmstadt. We characterize demonstrate usefulness instrumentation for both stationary fast...
Accurate spectroscopy of highly charged high-Z ions in a storage ring is demonstrated to be feasible by the use specially adapted crystal optics. The method has been applied for measurement 1s Lamb shift hydrogen-like gold (Au 78+) through Lyman x rays. This represents first result obtained element using high-resolution wavelength-dispersive hard x-ray regime, paving way sensitivity higher-order QED effects.
Grazing XRF measurements allow for a non-destructive investigation of the depth distribution ion implantations.
We report on the surface‐sensitive grazing emission X‐ray fluorescence technique combined with synchrotron radiation excitation and high‐resolution detection to realize depth‐profile measurements of Al‐implanted Si wafers. The principles as well benefits offered by sources wavelength‐dispersive setups are presented. It is shown that depth distribution implanted ions can be extracted from dependence intensity angle nanometer‐scale precision provided an analytical function describing shape...
The electronic structure of transition-metal oxides is a key component responsible for material's optical and chemical properties. Specifically metal-oxide structures, the crystal-field interaction determines shape, strength, occupancy orbitals. Consequently, splitting resulting unoccupied state populations can be foreseen as modeling factors photochemical activity. Herein, we study formation effects during thermal oxidation titanium in an ambient atmosphere range temperatures. X-ray...
The main advantage of wavelength-dispersive spectrometers applied in X-ray study is their high energy resolution. design and construction spectrometer, usually dedicated to the specific experimental systems, for example synchrotron based setups, need information about characteristics elements spectrometer such as optics elements, crystals detectors. Such can be obtained using Monte-Carlo simulations. In this paper, simulations tracing parallel-beam (PBWDS), equipped with polycapillary...
The design and performance of a high-resolution transmission-type X-ray spectrometer for use in the 15-26 keV energy range at synchrotron light sources is reported. Monte Carlo X-ray-tracing simulations were performed to optimize spectrometer, based on DuMond geometry, Super absorption beamline Swiss Light Source Paul Scherrer Institute. This provides an instrumental resolution 3.5 eV emission lines around 16 12.5 26 keV, which comparable natural linewidths K L transitions covered range....
Abstract The two‐electron relaxation processes in Rydberg hollow atoms (RHA), formed collisions of slow highly charged ions (HCI) Xe ( q = 23–36) with metallic Be surface, were studied experimentally by means X‐ray spectroscopy. pulsed beams HCI delivered the electron beam ion source while emitted X‐rays observed a silicon drift detector. From measured spectra M‐X‐rays, dominated Paschen series nf3d one‐electron‐one photon radiative (R) transitions, involving two electrons, namely, internal...
We present the first clear identification and highly accurate measurement of intra-shell transition 1s2p 3P2→1s2s 3S1 He-like uranium performed via x-ray spectroscopy. The experiment was conducted at gas-jet target ESR storage ring in GSI (Darmstadt, Germany), where a Bragg spectrometer, with bent germanium crystal, Ge(i) detector were mounted. Using deceleration capabilities, we differential between U energy, 4510 eV, 1s22p 2P3/2→1s22s 2S1/2 Li-like 4460 eV. By proper choice ion velocities,...
We report here on the results of Monte-Carlo simulations radiative recombination highly charged ions with low-energy electrons in presence a guiding magnetic field. The are based semi-classical geometrical model, recently proposed by our group, which has been developed order to explain systematic discrepancies, so-called 'enhancement effect', rates measured field electron coolers respect theoretical calculations. With simulations, we demonstrate that enhancement could be caused 'transverse'...
In this work we report on the measurements of X-rays emitted in interaction ∼100 keV Xe35+ ions with metallic Be foil. Measured X-ray spectrum was interpreted as a series satellite and hypersatellite nf-3d transitions n≥4. The observed from very high Rydberg states indicate formation so-called "hollow atoms" process neutralization highly charged surface.
In the presented study, X-ray photoelectron spectroscopy and total reflection methods were applied to analyze Ti (75 nm) Pd (100 nanolayers deposited on Si substrate using magnetron sputtering. The aim of research was determine elemental composition surface homogeneity analyzed before their irradiation with highly charged xenon ions estimate detection limit technique for various glancing angles. measurements conducted SPECS mono-XPS system in Institute Physics at Jan Kochanowski University...
The construction and results of the Monte-Carlo ray-tracing simulations for a low energy x-ray crystal spectrometer designed future experiments at ESR storage ring with fast highly charged ions are presented. has radius Rowland circle R = 0.5 m operates in Johann geometry. x-rays emitted from source diffracted by spherically bent silicon Si(111) registered two-dimensional deep depleted back-illuminated CCD camera. estimated efficiency, calculated according to dynamical theory diffraction is...