D. Kisielewska
A5019402564- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Muon and positron interactions and applications
- Computational Physics and Python Applications
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Nuclear physics research studies
- Astrophysics and Cosmic Phenomena
- Advanced MRI Techniques and Applications
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Radiation Therapy and Dosimetry
- Noncommutative and Quantum Gravity Theories
- Spacecraft and Cryogenic Technologies
- Advanced X-ray and CT Imaging
- Particle Accelerators and Free-Electron Lasers
- Aerodynamics and Acoustics in Jet Flows
Jagiellonian University
2012-2021
AGH University of Krakow
2011-2020
Institute of Physics
2008-2020
GSI Helmholtz Centre for Heavy Ion Research
2019
Technical University of Darmstadt
2019
The University of Adelaide
2014-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2018
Uppsala University
2015
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2014
Universidad de Granada
2014
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...
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...
The purpose of the presented research is estimation performance characteristics economic Total-Body Jagiellonian-PET system (TB-J-PET) constructed from plastic scintillators. are estimated according to NEMA NU-2-2018 standards utilizing GATE package. simulated detector consists 24 modules, each built out 32 scintillator strips (each with cross section 6 mm times 30 and length 140 cm or 200 cm) arranged in two layers regular 24-sided polygon circumscribing a circle diameter 78.6 cm. For...
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...
A bstract The three precision measurements of the cross section σ ( e + − → π γ(γ)) using initial state radiation by KLOE collaboration provide an important input for prediction hadronic contribution to anomalous magnetic moment muon. These are correlated both statistical and systematic uncertainties and, therefore, simultaneous use these requires covariance matrices that fully describe correlations. We present construction them determine a combined measurement γ(γ)). find, from this...
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...
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...
We searched for the $μ^+μ^-$ decay of a light vector gauge boson, also known as dark photon, in $e^+ e^- \to μ^+ μ^- γ_{\rm ISR}$ process by means Initial State Radiation (ISR) method. used 1.93~fb$^{-1}$ data collected KLOE experiment at DA$Φ$NE $ϕ$-factory. No structures have been observed over irreducible $μ^+ μ^-$ background. A 90\% CL limit on ratio $\varepsilon^2=α^{\prime}/α$ between coupling constant and fine structure $ 3\times 10^{-6}-2\times 10^{-7}$ has set photon mass region 519...
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...
The production of beauty and charm quarks in ep interactions has been studied with the ZEUS detector at HERA for exchanged four-momentum squared 5 < Q 2 1000 GeV2 using an integrated luminosity 354 pb−1. content events least one jet have extracted invariant mass charged tracks associated secondary vertices decay-length significance these vertices. Differential cross sections as a function 2, Bjorken x, trans- verse energy pseudorapidity were measured compared next-to-leading-order QCD...
The photoproduction of bottom quarks in events with two jets and a muon has been measured the ZEUS detector at HERA using an integrated luminosity 110 pb−1. fraction containing b was extracted from transverse momentum distribution relative to closest jet. Differential cross sections for production as function pseudorapidity muon, associated jet xγjets, photon’s participating hard process, are compared MC models QCD predictions made next-to-leading order. latter give good description...
Deep inelastic scattering and its diffractive component, $ep \to e^{\prime}\gamma^* p e^{\prime}XN$, have been studied at HERA with the ZEUS detector using an integrated luminosity of 52.4 pb$^{-1}$. The $M_X$ method has used to extract contribution. A wide range in centre-of-mass energy $W$ (37 -- 245 GeV), photon virtuality $Q^2$ (20 450 GeV$^2$) mass (0.28 35 GeV) is covered. cross section for $2 < M_X 15$ GeV rises strongly $W$, rise becoming steeper as increases. data are also presented...
The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET device built from plastic scintillators. It a multi-purpose detector designed for medical imaging and studies of properties positronium atoms in porous matter living organisms. In this article we report on commissioning J-PET view decays. We present results analysis positron lifetime measured polymer. obtained prove that capable performing simultaneous density distribution annihilation points as well spectroscopy.
We perform a parametric study of the newly developed time-of-flight (TOF) image reconstruction algorithm, proposed for real-time imaging in total-body Jagiellonian PET (J-PET) scanners. The asymmetric 3D filtering kernel is applied at each most likely position electron-positron annihilation, estimated from emissions back-to-back $\gamma$-photons. optimisation its parameters studied using Monte Carlo simulations 1-mm spherical source, NEMA IEC and XCAT phantoms inside ideal J-PET scanner....
A bstract Using 1.63 fb −1 of integrated luminosity collected by the KLOE experiment about 7 × 10 4 K S → π ± e ∓ ν decays have been reconstructed. The measured value charge asymmetry for this decay is = (−4.9 5.7 stat 2.6 syst ) −3 , which almost twice more precise than previous result. combination these two measurements gives (−3.8 5.0 and, together with L semileptonic decay, provides significant tests CPT symmetry. obtained results are in agreement invariance.