M. Skurzok
A5007550134- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Dark Matter and Cosmic Phenomena
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Advanced X-ray and CT Imaging
- Ionosphere and magnetosphere dynamics
- High-pressure geophysics and materials
- Advanced Semiconductor Detectors and Materials
- Neutrino Physics Research
- Advanced MRI Techniques and Applications
- Advanced Radiotherapy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Geological and Geochemical Analysis
- Advanced NMR Techniques and Applications
- Geophysics and Gravity Measurements
Jagiellonian University
2016-2025
Institute of Physics
2015-2024
University of Cologne
2024
GSI Helmholtz Centre for Heavy Ion Research
2019-2024
Theranostics (New Zealand)
2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2021-2023
Politecnico di Milano
2021-2023
Consorzio di Bioingegneria e Informatica Medica
2023
Czech Academy of Sciences, Institute of Physics
2023
A detection system of the conventional PET tomograph is set-up to record data from e+ e- annihilation into two photons with energy 511 keV, and it gives information on density distribution a radiopharmaceutical in body object. In this paper we explore possibility performing three gamma imaging based ortho-positronium annihilation, as well positronium mean lifetime J-PET constructed plastic scintillators. For purposes simulations formation its were performed taking account distributions...
The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET built from plastic scintillators.J-PET prototype consists of 192 detection modules arranged axially in three layers forming a cylindrical diagnostic chamber with inner diameter 85 cm and axial field-of-view 50 cm.An arrangement long strips scintillators, their small light attenuation, superior timing properties, relative ease increase opens promising perspectives for cost effective construction whole-body scanner, as well...
Positronium created in a human body during PET scans hallmarks neoplastic tissues.
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 novel whole-body PET system based on plastic scintillators is developed by the {J-PET} Collaboration. It consists of scintillator strips arranged axially in form a cylinder, allowing cost-effective construction total-body PET. In order to determine properties scanner prototype and optimize its geometry, advanced computer simulations using GATE software were performed. spatial resolution, sensitivity, scatter fraction noise equivalent count rate estimated according NEMA norm as function...
Charged lepton system symmetry under combined charge, parity, and time-reversal transformation (CPT) remains scarcely tested. Despite stringent quantum-electrodynamic limits, discrepancies in predictions for the electron-positron bound state (positronium atom) motivate further investigation, including fundamental tests. While CPT noninvariance effects could be manifested non-vanishing angular correlations between final-state photons spin of annihilating positronium, measurements were...
Positronium is abundantly produced within the molecular voids of a patient’s body during positron emission tomography (PET). Its properties dynamically respond to submolecular architecture tissue and partial pressure oxygen. Current PET systems record only two annihilation photons cannot provide information about positronium lifetime. This study presents in vivo images lifetime human, for patient with glioblastoma brain tumor, by using dedicated Jagiellonian system enabling simultaneous...
Discrete symmetries play an important role in particle physics with violation of CP connected to the matter-antimatter imbalance Universe. We report most precise test P, T and invariance decays ortho-positronium, performed methodology involving polarization photons from these decays. Positronium, simplest bound state electron positron, is recent interest discrepancies reported between measured hyperfine energy structure theory at level $10^{-4}$ signaling a need for better understanding...
A novel approach to tomographic data processing has been developed and evaluated using the Jagiellonian PET (J-PET) scanner as an example. We propose a system in which there is no need for powerful, local facility, capable reconstruct images on fly. Instead we introduce Field Programmable Gate Array (FPGA) System-on-Chip (SoC) platform connected directly streams coming from scanner, can perform event building, filtering, coincidence search Region-Of-Response (ROR) reconstruction by...
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...
In living organisms, the positron-electron annihilation (occurring during PET imaging) proceeds in about 30% via creation of a metastable ortho-positronium atom. tissue, due to pick-off and conversion processes, over 98% ortho-positronia annihilate into two 511 keV photons. this article, we assess feasibility for reconstruction mean lifetime image based on annihilations The main objectives work include (i) estimation sensitivity total-body scanners imaging using 2γ (ii) spatial time...
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...
J-PET is a detector optimized for registration of photons from the electron-positron annihilation via plastic scintillators where interact predominantly Compton scattering. Registration both primary and scattered enables to determinate linear polarization photon on event by basis with certain probability. Here we present quantitative results feasibility such measurements decay positronium explore physical limitations resolution determination 511 keV For scattering angles about 82 ∘ (where...
Abstract Background Total‐body (TB) Positron Emission Tomography (PET) is one of the most promising medical diagnostics modalities, opening new perspectives for personalized medicine, low‐dose imaging, multi‐organ dynamic imaging or kinetic modeling. The high sensitivity provided by total‐body technology can be advantageous novel tomography methods like positronium demanding registration triple coincidences. Currently, state‐of‐the‐art PET scanners use inorganic scintillators. However,...
The SIDDHARTA-2 collaboration is performing research in the field of kaonic atoms spectroscopy. In this work, following an introduction on and their importance for development low-energy strong interaction theories, first result experiment (kaonic helium) presented. This measurement was promising view main goal experiment, i.e. deuterium transitions to 1s level, important model kaon-nucleon interaction. last part paper future plans measure new key quantities with beyond stat-of-the-art...
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.
Abstract Purpose The time-over-threshold (TOT) technique is being used widely due to itsimplications in developing the multi-channel readouts, mainly when fast signal processing required. Using TOT technique, as a measure of energy loss instead charge integration methods, significantly reduces readout costs by combining time and information. Therefore, this approach can potentially be utilized J-PET tomograph which built from plastic scintillators characterized light signals. drawback...
A large area silicon drift detectors (SDDs) system and its readout electronics have been developed by the SIDDHARTA-2 Collaboration, aiming to perform high-precision light kaonic atoms x-ray spectroscopy for investigation of strong interaction in low-energy QCD regime. To these measurements, a linear energy response good resolution are mandatory requirements system, be preserved along whole DAQ (analog digital) chain; such task is made even harder experimental environment particles...