title: A feasibility study of ortho-positronium decays measurement with the J-PET scanner based on plastic scintillators.
abstract: We present a study of the application of the Jagiellonian positron emission tomograph (J-PET) for the registration of gamma quanta from decays of ortho-positronium (o-Ps). The J-PET is the first positron emission tomography scanner based on organic scintillators in contrast to all current PET scanners based on inorganic crystals. Monte Carlo simulations show that the J-PET as an axially symmetric and high acceptance scanner can be used as a multi-purpose detector well suited to pursue research including e.g. tests of discrete symmetries in decays of ortho-positronium in addition to the medical imaging. The gamma quanta originating from o-Ps decay interact in the plastic scintillators predominantly via the Compton effect, making the direct measurement of their energy impossible. Nevertheless, it is shown in this paper that the J-PET scanner will enable studies of the [Formula: see text] decays with angular and energy resolution equal to [Formula: see text] and [Formula: see text], respectively. An order of magnitude shorter decay time of signals from plastic scintillators with respect to the inorganic crystals results not only in better timing properties crucial for the reduction of physical and instrumental background, but also suppresses significantly the pile-ups, thus enabling compensation of the lower efficiency of the plastic scintillators by performing measurements with higher positron source activities.
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
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authors.initials: D
authors.lastname: Kamińska
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
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authors.lastname: Gajos
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: E
authors.initials: E
authors.lastname: Czerwiński
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Alfs
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: T
authors.initials: T
authors.lastname: Bednarski
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: P
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authors.lastname: Białas
authors.affiliation: INFN, Laboratori Nazionali di Frascati, CP 13, Via E. Fermi 40, 00044 Frascati, Italy.
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authors.lastname: Curceanu
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Dulski
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Głowacz
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: N
authors.initials: N
authors.lastname: Gupta-Sharma
authors.affiliation: Department of Nuclear Methods, Institute of Physics, Maria Curie-Sklodowska University, Pl. M. Curie-Sklodowskiej 1, 20-031 Lublin, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Gorgol
authors.affiliation: Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria.
authors.forename: B C
authors.initials: BC
authors.lastname: Hiesmayr
authors.affiliation: Department of Nuclear Methods, Institute of Physics, Maria Curie-Sklodowska University, Pl. M. Curie-Sklodowskiej 1, 20-031 Lublin, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Jasińska
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: G
authors.initials: G
authors.lastname: Korcyl
authors.affiliation: Świerk Computing Centre, National Centre for Nuclear Research, 05-400 Otwock-Świerk, Poland.
authors.forename: P
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authors.lastname: Kowalski
authors.affiliation: High Energy Department, National Centre for Nuclear Research, 05-400 Otwock-Świerk, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Krzemień
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: N
authors.initials: N
authors.lastname: Krawczyk
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: E
authors.initials: E
authors.lastname: Kubicz
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: M
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authors.lastname: Mohammed
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: Sz
authors.initials: S
authors.lastname: Niedźwiecki
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Pawlik-Niedźwiecka
authors.affiliation: Świerk Computing Centre, National Centre for Nuclear Research, 05-400 Otwock-Świerk, Poland.
authors.forename: L
authors.initials: L
authors.lastname: Raczyński
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: Z
authors.initials: Z
authors.lastname: Rudy
authors.affiliation: INFN, Laboratori Nazionali di Frascati, CP 13, Via E. Fermi 40, 00044 Frascati, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Silarski
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Wieczorek
authors.affiliation: Świerk Computing Centre, National Centre for Nuclear Research, 05-400 Otwock-Świerk, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Wiślicki
authors.affiliation: Department of Nuclear Methods, Institute of Physics, Maria Curie-Sklodowska University, Pl. M. Curie-Sklodowskiej 1, 20-031 Lublin, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Zgardzińska
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Zieliński
authors.affiliation: Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, Poland.
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authors.lastname: Moskal