A5021181389- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Nuclear Materials and Properties
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Magnetic confinement fusion research
- Electron and X-Ray Spectroscopy Techniques
- Particle accelerators and beam dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Fusion materials and technologies
- Diamond and Carbon-based Materials Research
- Boron Compounds in Chemistry
- Dark Matter and Cosmic Phenomena
- Graphite, nuclear technology, radiation studies
- Radioactive contamination and transfer
- Inorganic Fluorides and Related Compounds
- Radiopharmaceutical Chemistry and Applications
- High-pressure geophysics and materials
- Advanced Chemical Physics Studies
- Astro and Planetary Science
Belgian Nuclear Research Centre
2016-2025
European Commission
2011-2021
Nature Conservation Agency of the Czech Republic
2019
Czech Academy of Sciences, Nuclear Physics Institute
2009-2018
Institute of Physics of the Slovak Academy of Sciences
2018
Slovak Academy of Sciences
2018
Joint Research Center
2011-2017
Czech Academy of Sciences
2008-2015
Institute of Nuclear Physics
2014
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2011
Abstract The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutron-induced interactions with the major actinides $$^{235}\hbox {U}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>235</mml:mn></mml:msup><mml:mtext>U</mml:mtext></mml:mrow></mml:math> , $$^{238}\hbox /><mml:mn>238</mml:mn></mml:msup><mml:mtext>U</mml:mtext></mml:mrow></mml:math> $$^{239}\hbox {Pu}$$...
We present a search for the e+e− decay of hypothetical dark photon, also named U vector boson, in inclusive dielectron spectra measured by HADES p(3.5 GeV) + p, Nb reactions, as well Ar (1.756 GeV/u) KCl reaction. An upper limit on kinetic mixing parameter squared ϵ2 at 90% CL has been obtained mass range MU=0.02–0.55 GeV/c2 and is compared with world data set. For masses 0.03–0.1 GeV/c2, lowered respect to previous results, allowing now exclude large part region favored muon g−2 anomaly....
Employing the Bonn–Gatchina partial wave analysis framework (PWA), we have analyzed HADES data of reaction p(3.5GeV)+p→pK+Λ. This might contain information about kaonic cluster "ppK−" (with quantum numbers JP=0− and total isospin I=1/2) via its decay into pΛ. Due to interference effects in our coherent description data, a hypothetical K‾NN (or, specifically "ppK−") signal need not necessarily show up as pronounced feature (e.g. peak) an invariant mass spectrum like Our PWA includes variety...
We present results on dielectron production in ${}^{40}\mathrm{Ar}+\mathrm{KCl}$ collisions at 1.76$A$ GeV. For the first time $\ensuremath{\omega}$ mesons could be reconstructed a heavy-ion reaction bombarding energy which is well below threshold free nucleon-nucleon collisions. The multiplicity has been extracted and compared to yields of other particles, particular $\ensuremath{\varphi}$ meson. At intermediate ${e}^{+}{e}^{\ensuremath{-}}$ invariant masses, we find strong enhancement pair...
We present the inclusive invariant-mass, transverse momentum and rapidity distributions of dielectrons (e$^{+}$e$^{-}$ pairs) in p+p interactions at 3.5 GeV beam kinetic energy. In vector-meson mass region, a distinct peak corresponding to direct $\omega$ decays is reconstructed with 2% resolution. The data compared predictions from three model calculations. Due large acceptance HADES apparatus for $e^{+}e^{-}$ invariant masses above 0.2 GeV/$c^{2}$ pair momenta p$_{t}$ $ <$ 1 GeV/$c$,...
Neutrons produced by the ${}^{7}$Li($p$,$n$)${}^{7}$Be reaction close to threshold are widely used measure cross section of $s$-process nucleosynthesis reactions. While experiments have been performed so far with Van de Graaff accelerators, future use rf accelerators higher intensities is planned enable investigations on radioactive targets. Such have, however, poorer energy definition. We investigate in this work effects an energy-broadened proton beam spectrum neutrons emitted thick-target...
We present results of an exclusive measurement the first-excited state $\ensuremath{\Sigma}$ hyperon, $\ensuremath{\Sigma}{(1385)}^{+}$, produced in $p+p\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}+{K}^{+}+n$ at $3.5\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}$ beam energy. The extracted data allow detailed study invariant mass distribution $\ensuremath{\Sigma}{(1385)}^{+}$. is well described by a relativistic Breit-Wigner function with maximum...
The nuclide cross sections and longitudinal velocity distributions of residues produced in the reactions $^{136}\mathrm{Xe}$ $^{124}\mathrm{Xe}$ at $1A$ GeV a lead target were measured high-resolution magnetic spectrometer, fragment separator (FRS) GSI. data cover broad range isotopes elements between $Z=3$ $Z=56$ for $Z=5$ $Z=55$ $^{124}\mathrm{Xe}$, reaching down to few microbarns. exhibit Gaussian shape masses above $A=20$, while more complex behavior is observed lighter masses. isotopic...
We present data on dielectron emission in proton induced reactions a Nb target at 3.5 GeV kinetic beam energy measured with HADES installed GSI. The represent the first high statistics measurement of proton-induced radiation from cold nuclear matter kinematic regime, where strong medium effects are expected. Combined good mass resolution 2%, it is sensitive to changes spectral functions vector mesons, as predicted by models for hadrons rest or small relative momenta. Comparing e+e invariant...
We report on baryon resonance production and decay in proton-proton collisions at a kinetic energy of 3.5 GeV based data measured with HADES. The exclusive channels $ pp \rightarrow np\pi^{+}$ pp\rightarrow pp\pi^{0}$ as well ppe^{+}e^{-}$ are studied simultaneously for the first time. invariant masses angular distributions pion-nucleon systems were compared to simulations model ansatz assuming saturation pion by an incoherent sum baryonic resonances (R < 2 GeV/c2. A very good description...
We present the analysis of inclusive ${K}^{0}$ production in $p+p$ and $p+\mathrm{Nb}$ collisions measured with HADES detector (GSI Helmholtzzentrum for Heavy-Ion Research, Darmstadt) at a beam kinetic energy 3.5 GeV. Data are compared to Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model. The data suggest presence repulsive momentum-dependent kaon potential as predicted by chiral perturbation theory (ChPT). For rest normal nuclear density, ChPT amounts $\ensuremath{\approx}35$ MeV....
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...
Results on the production of double strange cascade hyperon Ξ^{-} are reported for collisions p(3.5 GeV)+Nb, studied with High Acceptance Di-Electron Spectrometer (HADES) at SIS18 GSI Helmholtzzentrum Heavy-Ion Research, Darmstadt. For first time, subthreshold is observed in proton-nucleus interactions. Assuming a phase-space distribution similar to that Λ hyperons, probability amounts P_{Ξ^{-}}=[2.0±0.4(stat)±0.3(norm)±0.6(syst)]×10^{-4} resulting Ξ^{-}/(Λ+Σ^{0}) ratio...
An exclusive analysis of the four-body final states $\ensuremath{\Lambda}+p+{\ensuremath{\pi}}^{+}+{K}^{0}$ and ${\ensuremath{\Sigma}}^{0}+p+{\ensuremath{\pi}}^{+}+{K}^{0}$ measured with HADES for $p+p$ collisions at a beam kinetic energy 3.5 GeV is presented. The uses various phase space variables, such as missing mass invariant distributions, in four-particle event selection $(p$,${\ensuremath{\pi}}^{+}$,${\ensuremath{\pi}}^{+}$,${\ensuremath{\pi}}^{\ensuremath{-}})$ to find cross sections...
Data on inclusive pion and eta production measured with the dielectron spectrometer HADES in reaction p+93Nb at a kinetic beam energy of 3.5 GeV are presented. Our results, obtained photon conversion method, supplement rather sparse information neutral meson proton-nucleus reactions existing for this bombarding regime. The reconstructed e+e-e+e- transverse-momentum rapidity distributions confronted transport model calculations, which account fairly well both pi0 production.