17-19 October 2018
Laboratori Nazionali di Frascati INFN
Europe/Rome timezone

Imaging of X-rays from ortho-positronium decay with J-PET tomograph

19 Oct 2018, 12:30
Aula Salvini (Laboratori Nazionali di Frascati INFN)

Aula Salvini

Laboratori Nazionali di Frascati INFN

Via E. Fermi 40 00044 Frascati (RM)


Mr Szymon Niedźwiecki (Jagiellonian University)


Standard Positron Emission Tomography (PET) allows to determine spatial and sometimes also temporal distribution of concentrations of selected substances in the body based on production of 2 gamma quanta from e+e- reaction, with energies of 511 keV. Positron emitted inside the human body can either annihilate directly with one of the electrons or it creates the quasi-bound state of electron and positron called positronium atom. Imaging of the properties of positronium inside the body may deliver new diagnostic information. J-PET group has developed a way of measuring one of such new parameters [1], but it is necessary to detect positronium decay into 3 photons, which constitutes to about 0.5% of all annihilations. The energy of photons, due to three body decay, varies from 0 to 511 keV, which implies that J-PET detector needs to sensitive to hard X-ray region. In the presentation the feasibility of imaging positronium with X-rays will be discussed as well as initial results from measurements performed during this summer. [1] P. Moskal et al., "Feasibility study of the positronium imaging with the J-PET tomograph", submitted to PMB, HEP: arXiv:https://arxiv.org/pdf/1805.11696.pdf

Primary author

Mr Szymon Niedźwiecki (Jagiellonian University)

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