A5012504642- X-ray Spectroscopy and Fluorescence Analysis
- Cultural Heritage Materials Analysis
- Nuclear Physics and Applications
- Conservation Techniques and Studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Building materials and conservation
- Radioactivity and Radon Measurements
- Advanced X-ray and CT Imaging
- Radiation Shielding Materials Analysis
- X-ray Diffraction in Crystallography
- Radioactive contamination and transfer
- Geology and Paleoclimatology Research
- Radiation Detection and Scintillator Technologies
- Image Processing and 3D Reconstruction
- Electron and X-Ray Spectroscopy Techniques
- Archaeology and ancient environmental studies
- Geochemistry and Geologic Mapping
- Planetary Science and Exploration
- Graphite, nuclear technology, radiation studies
- Ancient and Medieval Archaeology Studies
- Tree-ring climate responses
- Atomic and Subatomic Physics Research
- Advanced X-ray Imaging Techniques
Czech Technical University in Prague
2015-2024
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2016
Universidade de Santiago de Compostela
2014-2015
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.
A commonly marketed handheld Raman spectrometer showed excellent possibilities in being used as a key instrument for unambiguous identification of gemstones mounted the sceptre Faculty Science Charles University Prague from mid‐20s 20th century. Numerous SiO 2 forms including chalcedonies intermixed with moganites (e.g. moss agates and carnelians), amethysts, citrines well garnets (pyrope–almandines) were identified. The estimation garnet type was based on obtained parameters. individual...
This paper reports on a quantitative evaluation of data in microscopic X-ray fluorescence analysis metallic objects. A new simple technique reducing the effects caused by presence irregularities surface is introduced. The algorithm based assumption that behavior these comparable to local tilting object under investigation. In scanning XRF microanalysis, more precise distributions element concentrations could be obtained. addition, relief image scanned area can reconstructed. picture similar...
This paper summarizes the effects of irregular shape on results a quantitative X-ray fluorescence (XRF) micro-analysis. These become relevant when an XRF analysis is performed directly investigated material. A typical example analyses valuable and historical objects whose measurements should be non-destructively non-invasively, without taking samples. Several computer simulations were for selected metallic materials shapes to evaluate accuracy precision XRF. The described experiments...
The results of a search for hydrogen-like atoms consisting $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with nickel target has been seen in terms characteristic pairs their breakup the same ($178 \pm 49$) and Coulomb final state interaction ($653 42$). Using these analysis yields first value lifetime $\tau=(2.5_{-1.8}^{+3.0})$ fs model-independent measurement S-wave isospin-odd scattering length...
The observation of hydrogenlike πK atoms, consisting π^{-}K^{+} or π^{+}K^{-} mesons, is presented. atoms are produced by 24 GeV/c protons from the CERN PS accelerator, interacting with platinum nickel foil targets. breakup (ionization) in same targets yields characteristic pairs, called "atomic pairs," small relative momenta Q pair center-of-mass system. upgraded DIRAC experiment observed 349±62 such atomic corresponding to a signal 5.6 standard deviations. This first statistically...
Depressions containing partially molten rocks were investigated in Quaternary pebbly sedi-ments Alpine foreland Bavaria, Germany. Ruins of limekilns from 18-19th centuries are abundant around Seeshaupt. They usually associated with earthworks for fuel feeding and protection wind. contain stones furnace walls, lime burnt loam remnants. On the surface pebbles (typically gneisses), green glass formed chemical composition possibly affected by moderately volatile components wood biomass, mainly K...
New research of two craters at Emmerting (No. 4 and No. 5), Germany, is presented. This paper should be the first part papers concerning presumed impact Emmerting. The second will about mineralogical/petrological, temperature stress analyses. enstatite-dominated meteoritic material, found in crater [Procházka et al., 2022; Procházka, 2023], subject a separate detailed research. High-temperature effects extreme deformation are significant both craters. explained with pressure wave(s) later...