A5052725395- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- High-Energy Particle Collisions Research
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- Radioactivity and Radon Measurements
- Dark Matter and Cosmic Phenomena
- Cold Fusion and Nuclear Reactions
- Research Data Management Practices
- Geotechnical and Mining Engineering
- Cold Atom Physics and Bose-Einstein Condensates
- Industrial and Mining Safety
- Geology and Environmental Impact Studies
- Gamma-ray bursts and supernovae
- Various Chemistry Research Topics
- Pulsars and Gravitational Waves Research
- Electron and X-Ray Spectroscopy Techniques
- Advanced NMR Techniques and Applications
- Groundwater and Isotope Geochemistry
- Arctic and Antarctic ice dynamics
University of Silesia in Katowice
2014-2024
Czech Academy of Sciences, Institute of Physics
2024
Institute of Physics
2014-2024
Forschungszentrum Jülich
2014-2020
Uppsala University
2017-2020
University of Warsaw
2013-2019
Jagiellonian University
2013-2019
Institute of Nuclear Physics, Polish Academy of Sciences
2013-2019
University of Groningen
2019
Zorginstituut Nederland
2013-2014
The differences between neutron and proton density distributions at large nuclear radii in stable nuclei were determined. Two experimental methods applied: spectroscopy analysis of the antiproton annihilation residues one mass unit lighter than target measurements strong-interaction effects on antiprotonic x rays. Assuming validity two-parameter Fermi these radii, conclusions are that two experiments consistent with each other for rich it is mostly diffuseness which increases not...
We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn→dπ(0)π(0) over full energy region ABC effect, a pronounced low-mass enhancement in ππ-invariant mass spectrum. The measurements, which cover also transition to conventional t-channel ΔΔ process, were performed with upgraded WASA detector setup at COSY. data reveal Abashian-Booth-Crowe effect be uniquely correlated Lorentzian dependence integral cross section....
Exclusive and kinematically complete high-statistics measurements of quasifree polarized $\stackrel{\ensuremath{\rightarrow}}{n}p$ scattering have been performed in the energy region narrow resonancelike structure ${d}^{*}$ with $I({J}^{P})=0({3}^{+})$, $M\ensuremath{\approx}2380\text{ }\text{ }\mathrm{MeV}$, $\mathrm{\ensuremath{\Gamma}}\ensuremath{\approx}70\text{ }\mathrm{MeV}$ observed recently double-pionic fusion channels...
The x-ray cascade from antiprotonic atoms was studied for $^{208}\mathrm{Pb}$ and $^{209}\mathrm{Bi}$. Widths shifts of the levels due to strong interaction were determined. Using modern antiproton-nucleus optical potentials, neutron densities in nuclear periphery deduced. Assuming two-parameter Fermi distributions (2pF) describing proton densities, rms radii deduced both nuclei. difference $\ensuremath{\Delta}{r}_{\mathit{np}}$ equal...
Exclusive measurements of the quasifree $pn\ensuremath{\rightarrow}pp{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}$ reaction have been performed by means $pd$ collisions at ${T}_{p}$ $=$ 1.2 GeV using wide angle shower apparatus (WASA) detector setup cooler synchrotron COSY (Institut f\"ur Kernphysik, J\"ulich). Total and differential cross sections obtained covering energy region $\sqrt{s}$ (2.35--2.46) GeV, which includes ABC effect its associated resonance structure. No...
New data on quasifree polarized neutron-proton scattering in the region of recently observed ${d}^{*}$ resonance structure are obtained by exclusive and kinematically complete high-statistics measurements with WASA at COSY. This paper details determination beam polarization, checks character process, all ${A}_{y}$ angular distributions new partial-wave analysis, which includes producing a pole ${}^{3}{D}_{3}\ensuremath{-}{}^{3}{G}_{3}$ coupled partial waves...
Exclusive measurements of the quasi-free $np \to np\pi^0\pi^0$ reaction have been performed by means $dp$ collisions at $T_d$ = 2.27 GeV using WASA detector setup COSY. Total and differential cross sections obtained covering energy region $\sqrt s$ (2.35 - 2.46) GeV, which includes ABC effect its associated $d^*(2380)$ resonance. Adding $d^*$ resonance amplitude to that for conventional processes leads a reasonable description data. The observed in total section is agreement with predictions...
High-precision cross-section data of the deuteron-proton breakup reaction at 130 MeV are presented for 72 kinematically complete configurations. The cover a large region available phase space, divided into systematic grid kinematical variables. They compared with theoretical predictions, in which full dynamics three-nucleon (3N) system is obtained three different ways: realistic nucleon-nucleon (NN) potentials combined model 3N forces (3NF's) or an effective 3NF resulting from explicit...
An exclusive measurement of the excitation function for dd->3Heppi- reaction was performed at Cooler Synchrotron COSY-Juelich with WASA-at-COSY detection system. The data were taken during a slow acceleration beam from 2.185 GeV/c to 2.400 crossing kinematic threshold eta meson production in dd->4He-eta 2.336 GeV/c. corresponding excess energy respect 4He-eta system varied -51.4MeV 22MeV. integrated luminosity experiment determined using dd->3Hen reaction. shape examined. No signal bound...
The nuclear periphery was studied by using antiprotons. Two experimental methods were applied: analysis of the antiproton annihilation residues one mass unit lighter than target spectroscopy and measurement strong interaction effects on antiprotonic level widths shifts. 26 isotopes from a wide range numbers (40<A<238) investigated. gathered antiprotonic-atom data compared with results obtained hadron scattering some expectations theoretical approaches.
High precision cross-section data of the deuteron-proton breakup reaction at 130 MeV deuteron energy are compared with theoretical predictions obtained a coupled-channel extension CD Bonn potential virtual Delta-isobar excitation, without and inclusion long-range Coulomb force. The effect is studied on basis set, extended in this work to about 1500 points by including geometries characterized small polar angles two protons. experimental clearly prefer interaction included. strongest effects...
High-precision data for vector and tensor analyzing powers the $^{1}\mathrm{H}$$(\mathrm{dP\vec},\mathit{pp})n$ reaction at a 130-MeV deuteron beam energy have been measured over large part of phase space. Theoretical predictions based on various approaches to describe three nucleon ($3N$) system reproduce very well power no three-nucleon force effect is observed these observables. Tensor are also reproduced by calculations in almost whole studied region, but locally certain discrepancies...
We report on a high-statistics measurement of the most basic double pionic fusion reaction $\vec{n}p \to d\pi^0\pi^0$ over energy region $d^*(2380)$ resonance by use polarized deuteron beam and observing in quasifree scattering mode. The measurements were performed with WASA detector setup at COSY. data reveal substantial analyzing powers confirm conclusions about $d^*$ obtained from unpolarized measurements. also previous under complementary kinematic conditions.
Exclusive and kinematically complete measurements of the double pionic fusion to ${}^{3}\mathrm{He}$ have been performed in energy region so-called ABC effect, which denotes a pronounced low-mass enhancement $\ensuremath{\pi}\ensuremath{\pi}$-invariant mass spectrum. The experiments were carried out with WASA detector setup at COSY (the cooler synchrotron Forschungszentrum J\"ulich). Similar observations basic $pn\ensuremath{\rightarrow}d{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ reaction...
Exclusive measurements of the quasi-free pn→ppπ− and pp→ppπ0 reactions have been performed by means pd collisions at Tp=1.2 GeV using WASA detector setup COSY. Total differential cross sections obtained covering energy region Tp=0.95–1.3GeV (s=2.3–2.46 GeV), which includes regions Δ(1232), ⁎N⁎(1440) ⁎d⁎(2380) resonance excitations. From these isoscalar single-pion production has extracted, for data existed so far only below Tp=1 GeV. We observe a substantial increase this section around 1...
Exclusive and kinematically complete high-statistics measurements of the double pionic fusion reaction $dd \to ^4$He$\pi^0\pi^0$ have been performed in energy range 0.8 - 1.4 GeV covering thus region ABC effect, which denotes a pronounced low-mass enhancement $\pi\pi$-invariant mass spectrum. The experiments were carried out with WASA detector setup at COSY. Similar to observation basic $pn d \pi^0\pi^0$ reaction, data reveal correlation between effect resonance-like dependence total cross...
Dalitz plot distribution of the $\eta\to\pi^+\pi^-\pi^0$ decay is determined using a data sample $1.2\cdot 10^7$ $\eta$ mesons from $pd\to ^3\textrm{He}\eta$ reaction at 1 GeV collected by WASA detector COSY.