Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8170674 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2016 | 6 Pages |
Abstract
This work reports on a new reconstruction algorithm allowing us to reconstruct the decays of ortho-positronium atoms into three photons using the places and times of photons recorded in the detector. The method is based on trilateration and allows for a simultaneous reconstruction of both location and time of the decay. Results of resolution tests of the new reconstruction in the J-PET detector based on Monte Carlo simulations are presented, which yield a spatial resolution at the level of 2Â cm (FWHM) for X and Y and at the level of 1Â cm (FWHM) for Z available with the present resolution of J-PET after application of a kinematic fit. Prospects of employment of this method for studying angular correlations of photons in decays of polarized ortho-positronia for the needs of tests of CP and CPT discrete symmetries are also discussed. The new reconstruction method allows for discrimination of background from random three-photon coincidences as well as for application of a novel method for determination of the linear polarization of ortho-positronium atoms, which is also introduced in this work.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
A. Gajos, D. KamiÅska, E. CzerwiÅski, D. Alfs, T. Bednarski, P. BiaÅas, B. GÅowacz, M. Gorgol, B. JasiÅska, Å. KapÅon, G. Korcyl, P. Kowalski, T. Kozik, W. KrzemieÅ, E. Kubicz, M. Mohammed, Sz. Niedźwiecki, M. PaÅka, P. Moskal,