Titel
A feasibility study of ortho-positronium decays measurement with the J-PET scanner based on plastic scintillators
Autor*in
D. Kamińska
Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University
Autor*in
A. Gajos
Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University
Autor*in
E. Czerwiński
Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University
... show all
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 o-Ps →3γ decays with angular and energy resolution equal to σ(θ)≈0.4∘ and σ(E)≈4.1keV, 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.
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
https://phaidra.univie.ac.at/o:527716
Erschienen in
Titel
The European Physical Journal C
Band
76
Ausgabe
8
Verlag
Springer Nature
Erscheinungsdatum
2016
Zugänglichkeit

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