O. Svoboda
A5009859762- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- Advanced Measurement and Metrology Techniques
- Nuclear Materials and Properties
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
- Boron Compounds in Chemistry
- Structural Analysis of Composite Materials
- Spectroscopy and Quantum Chemical Studies
- Particle accelerators and beam dynamics
- Structural Analysis and Optimization
- Textile materials and evaluations
- Advanced machining processes and optimization
- Electron and X-Ray Spectroscopy Techniques
- Fusion materials and technologies
- Advanced X-ray and CT Imaging
- Quantum, superfluid, helium dynamics
Institute of Nuclear Physics
2014-2025
Czech Academy of Sciences, Nuclear Physics Institute
2015-2024
Technical University of Darmstadt
2022
University of Wuppertal
2022
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2021
Metroprojekt Praha (Czechia)
2021
Metrostav (Czechia)
2021
South Moravian Region
2020
Thermo Fisher Scientific (Czechia)
2020
Institute of Physics of the Slovak Academy of Sciences
2018-2019
The global polarization of {\Lambda} hyperons along the total orbital angular momentum a relativistic heavy-ion collision is presented based on high statistics data samples collected in Au+Au collisions at \sqrt{s_{NN}} = 2.4 GeV and Ag+Ag 2.55 with High-Acceptance Di-Electron Spectrometer (HADES) GSI, Darmstadt. This first measurement below strangeness production threshold nucleon-nucleon collisions. Results are reported as function centrality well hyperon transverse (p_T) rapidity (y_{CM})...
We study dynamical processes following water dimer ionization. The nonadiabatic simulations of the radical cation are performed using a surface hopping technique and Complete Active Space – Self Consistent Field (CASSCF) method for description electronic structure. main goal this is to find out whether state-dependent reactivity observed cation. provide detailed mapping potential energy surfaces (PESs) in relevant coordinates different states. Dynamical patterns discussed on basis static PES...
Abstract High-precision measurements of flow coefficients $$v_{n}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>v</mml:mi> <mml:mi>n</mml:mi> </mml:msub> </mml:math> ( $$n = 1 - 4$$ <mml:mrow> <mml:mo>=</mml:mo> <mml:mn>1</mml:mn> <mml:mo>-</mml:mo> <mml:mn>4</mml:mn> </mml:mrow> ) for protons, deuterons and tritons relative to the first-order spectator plane have been performed in Au+Au collisions at $$\sqrt{s_{_{{\text {NN}}}}}= 2.4$$ <mml:msqrt>...
We have performed large-scale simulations of UV absorption spectra water clusters (monomer to octamer) using a combination ab initio path-integral molecular dynamics with reflection principle. The aim the present work is four-fold: (1) To explore transition from isolated molecules bulk perspective photoabsorption. (2) investigate quantum nuclear and thermal effects on shape spectra. (3) make an assessment density functional theory functionals be used for excited states. (4) check...
Herein we evaluate the influence of an electric field on coupling two delocalized electrons in mixed-valence polyoxometalate (POM) [GeV14 O40 ](8-) (in short V14 ) by using both a t-J model Hamiltonian and DFT calculations. In absence compound is paramagnetic, because are localized different parts POM. When applied, abrupt change magnetic between can be induced. Indeed, forces to localize nearest-neighbors metal centers, leading very strong antiferromagnetic coupling. Both theoretical...
We report on the first measurement of $p\mathrm{\ensuremath{\Lambda}}$ and $pp$ correlations via femtoscopy method in $p$ + Nb reactions at $\sqrt{{s}_{\mathit{NN}}}=3.18\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}$, studied with High Acceptance Di-Electron Spectrometer (HADES). By comparing experimental correlation function to model calculations, a source size for pairs...
We have applied ab initio based reflection principle to simulate photoelectron spectra of small water clusters, ranging from monomer octamer. The role quantum and thermal effects on the structure is discussed within path integral molecular dynamics (PIMD) framework. used PIMD method with up 40 beads sample ground state distribution at temperature T = 180 K. thoroughly tested performance various density functionals (B3LYP, BHandHLYP, M06HF, BNL, LC-ωPBE, CAM-B3LYP) for ionization process...
The two-electron reduced mixed-valence polyoxometalate [GeV14O40]8− presents an unusual paramagnetic behaviour as a consequence of the partial trapping these electrons. effect applying electric field is that inducing antiferromagnetic coupling between two delocalized electronic spins.
Photolysis of the nitrate anion is involved in oxidation processes hydrosphere, cryosphere, and stratosphere. While it known that photolysis long-wavelength region proceeds with a very low quantum yield, mechanism photodissociation remains elusive. Here, we present quantitative modeling singlet-singlet singlet-triplet absorption spectra atmospherically relevant around 300 nm, argue spin-forbidden transition between singlet ground state first triplet contributes non-negligibly to photolysis....
An electromagnetic calorimeter (ECAL) is being developed to complement the dilepton spectrometer HADES currently operating on beam of SIS18 heavy-ion synchrotron at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. The ECAL will allow HADES@FAIR experiment measure data neutral meson production in heavy ion collisions energy range 2–10 AGeV with future accelerator SIS100@FAIR. also improve electron-hadron separation spectrometer, and be used for detection photons from strange...
Neutron activation and gamma spectrometry are usable also for the determination of cross-sections different neutron reactions. We have studied cross-section yttrium (n,xn) threshold reactions using quasi mono-energetic source based on reaction 7Li target at Nuclear Physics Institute ASCR in Rez. Yttrium suitable candidates fast field measurement by detectors. Fast monitoring is necessary already today a wide range accelerator facilities will gain importance future reactors generation IV,...
The inclusive production of {\Lambda} hyperons in proton-proton collisions at $\sqrt{s}$ = 3.18 GeV was measured with HADES the GSI Helmholtzzentrum f\"ur Schwerionenforschung Darmstadt. experimental data are compared to a data-based model for individual exclusive channels same reaction. contributions intermediate resonances such as {\Sigma}(1385), {\Delta}++ or N* considered detail. In particular, result partial wave analysis is accounted abundant pK$^+${\Lambda} final state. Model and show...
The production of $\Sigma^{0}$ baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to $\sqrt{s_{NN}}=3.18$ is studied with detector set-up HADES at GSI, Darmstadt. $\Sigma^{0}$s were identified via decay $\Sigma^{0} \rightarrow \Lambda \gamma$ subsequent decays $\Lambda \pi^{-}$ coincidence a $e^{+}e^{-}$ pair from either external ($\gamma e^{+} e^{-}$) or internal (Dalitz $\gamma^{*}\rightarrow gamma conversions. differential $\Sigma^0$ cross section integrated over acceptance,...
The collaboration Energy and Transmutation of Radioactive Waste uses different setups consisting lead, uranium graphite irradiated by relativistic protons deuterons to study transmutation radioactive materials produced neutrons. Our group measured spatial distribution neutrons means activation samples during the assembly irradiation JINR Nuclotron beams. We also present results simulations using MCNPX code their comparison with obtained experimental data. use Au, Al, Bi, In Ta foils as...
The paper describes cross-section measurements consisting of neutron activation using a 7Li(p,n) quasi mono-energetic source and gamma-ray spectrometry performed at the Nuclear Physics Institute Czech Academy Sciences in Řež, Republic. analysis excitation functions neutron-induced threshold reactions for energy range from 17 up to 34 MeV is presented. cross sections population both ground isomeric states were measured yttrium gold. A comprehensive comparison with earlier experimental data...