Determination of the $3\gamma $ Fraction from Positron Annihilation in Mesoporous Materials for Symmetry Violation Experiment with J-PET Scanner

Jasińska, B.; Gorgol, M.; Wierteł, M.; Zaleski, R.; Alfs, D.; Bednarski, T.; Białas, P.; Czerwiński, E.; Dulski, K.; Gajos, A.; Głowacz, B.; Kamińska, D.; Kapłon, Ł.; Korcyl, G.; Kozik, T.; Krzemień, W.; Kubicz, E.; Mohammed, M.; Niedźwiecki, Sz.; Pałka, M.; Raczyński, L.; Rudy, Z.; Rundel, O.; Sharma, N.G.; Silarski, M.; Słomski, A.; Strzelecki, Adam; Wieczorek, A.; Wiślicki, W.; Zgardzińska, B.; Zieliński, Marcin; Moskal, P.

doi:10.5506/aphyspolb.47.453

Cited by 36 publications

(45 citation statements)

References 37 publications

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“…The detection of 1274 keV prompt γ from 22 Ne * deexcitation is a start signal for the positronium lifetime measurement. The emitted positrons are stopped in the cylinder wall producing o-Ps which may undergo annihilation to 3γ.…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

“…The measurements with a point-like 22 Na source placed inside the J-PET system were already performed for the preliminary determination of the detector time and spatial resolution [20,21]. For physics studies a point-like source covered by the XAD-4 porous polymer [22,23] was placed in the center of the detector.…”

Section: The Experimental Techniquementioning

confidence: 99%

“…The following reactions chain is considered: 22 Na → 22 Ne * + e + + ν e 22 Ne * → 22 Ne + γ e + + e − → o-Ps → 3γ…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

“…For physics studies a point-like source covered by the XAD-4 porous polymer [22,23] was placed in the center of the detector. The XAD-4 material is used to increase the probability of positronium formation.…”

Section: The Experimental Techniquementioning

confidence: 99%

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Studies of discrete symmetries in decays of positronium atoms

Czerwiński

Curceanu

Dulski

et al. 2018

EPJ Web of Conferences

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Abstract.A positronium -a bound state of electron and positron -is an eigenstate of parity and charge conjugation operators which decays into photons. It is a unique laboratory to study discrete symmetries whose precision is limited, in principle, by the effects due to the weak interactions expected at the level of 10 −14 and photon-photon interactions expected at the level of 10 −9 . The Jagiellonian Positron Emission Tomograph (J-PET) is a detector for medical imaging as well as for physics studies involving detection of electronpositron annihilation into photons. The physics case covers the areas of discrete symmetries studies and genuine multipartite entanglement. The J-PET detector has high angular and time resolution and allows for determination of spin of the positronium and the momenta and polarization vectors of annihilation quanta. In this article, we present the potential of the J-PET system for studies of discrete symmetries in decays of positronium atoms.

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Section: Epj Web Of Conferencesmentioning

confidence: 99%

Section: The Experimental Techniquementioning

confidence: 99%

“…The following reactions chain is considered: 22 Na → 22 Ne * + e + + ν e 22 Ne * → 22 Ne + γ e + + e − → o-Ps → 3γ…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

Section: The Experimental Techniquementioning

confidence: 99%

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Studies of discrete symmetries in decays of positronium atoms

Czerwiński

Curceanu

Dulski

et al. 2018

EPJ Web of Conferences

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“…Polarized pozitronium is produced in the layer of porous material (eg. aerogel or polymer [10]) surrounding radioactive source providing longitudinally polarized positrons in a parity violating beta-plus decay (eg. sodium 22 Na).…”

Section: Discrete Symmetries In Decays Of Positronium Atomsmentioning

confidence: 99%

J-PET detector system for studies of the electron-positron annihilations

et al. 2016

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Abstract. Jagiellonian Positron Emission Tomograph (J-PET) has been recently constructed at the Jagiellonian University as a prototype of a cost-effective scanner for the metabolic imaging of the whole human body. J-PET detector is optimized for the measurement of momentum and polarization of photons from the electron-positron annihilations. It is built out of strips of plastic scintillators, forming three cylindrical layers. As detector of gamma quanta it will be used for studies of discrete symmetries and multiparticle entanglement of photons originating from the decays of ortho-positronium atoms.

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Commissioning of the J-PET detector in view of the positron annihilation lifetime spectroscopy

et al. 2018

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The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET device built from plastic scintillators. It is a multi-purpose detector designed for medical imaging and for studies of properties of positronium atoms in porous matter and in living organisms. In this article we report on the commissioning of the J-PET detector in view of studies of positronium decays. We present results of analysis of the positron lifetime measured in the porous polymer. The obtained results prove that J-PET is capable of performing simultaneous imaging of the density distribution of annihilation points as well as positron annihilation lifetime spectroscopy.

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Determination of the $3\gamma $ Fraction from Positron Annihilation in Mesoporous Materials for Symmetry Violation Experiment with J-PET Scanner

Cited by 36 publications

References 37 publications

Studies of discrete symmetries in decays of positronium atoms

Studies of discrete symmetries in decays of positronium atoms

J-PET detector system for studies of the electron-positron annihilations

Commissioning of the J-PET detector in view of the positron annihilation lifetime spectroscopy

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