Feasibility studies for imaging e+e− annihilation with modular multi-strip detectors

Studies based on imaging the annihilation of the electron (e−) and its antiparticle positron (e+) open up several interesting applications in nuclear medicine and fundamental research. The annihilation process involves both the direct conversion of e+e− into photons and the formation of their atomic...

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Published in:	Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 1062; p. 169192
Main Authors:	Sharma, S., Povolo, L., Mariazzi, S., Korcyl, G., Kacprzak, K., Kumar, D., Niedźwiecki, S., Baran, J., Beyene, E., Brusa, R.S., Caravita, R., Chug, N., Coussat, A., Curceanu, C., Czerwinski, E., Dadgar, M., Das, M., Dulski, K., Eliyan, K., Gajos, A., Gupta, N., Hiesmayr, B.C., Kapłon, Ł., Kaplanoglu, T., Klimaszewski, K., Konieczka, P., Kozik, T., Kozani, M.K., Krzemień, W., Moyo, S., Mryka, W., Penasa, L., Parzych, S., Rio, E. Perez. Del, Raczyński, L., Shivani, Shopa, R.Y., Skurzok, M., Stępień, E.Ł., Tanty, P., Tayefi, F., Tayefi, K., Wiślicki, W., Moskal, P.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-05-2024
Subjects:	Inertial sensing on Ps Modular J-PET Position sensitive detectors Positron and positronium beam Position sensitive detectors Inertial sensing on Ps Modular J-PET Positron and positronium beam
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Summary:	Studies based on imaging the annihilation of the electron (e−) and its antiparticle positron (e+) open up several interesting applications in nuclear medicine and fundamental research. The annihilation process involves both the direct conversion of e+e− into photons and the formation of their atomically bound state, the positronium atom (Ps), which can be used as a probe for fundamental studies. With the ability to produce large quantities of Ps, manipulate them in a long-lived Ps states, and image their annihilations after a free fall or after passing through atomic interferometers, this purely leptonic antimatter system can be used to perform inertial sensing studies in view of a direct test of Einstein’s equivalence principle. It is envisioned that modular multi-strip detectors can be exploited as potential detection units for this kind of studies. In this work, we report the results of the first feasibility study performed on a e+ beamline using two detection modules to evaluate their reconstruction performance and spatial resolution for imaging e+e− annihilations and thus their applicability for gravitational studies of Ps.
ISSN:	0168-9002 1872-9576
DOI:	10.1016/j.nima.2024.169192