We demonstrated the feasibility of measuring the axial coordinate of a gamma quantum interaction point in a plastic scintillator bar via the detection of scintillation photons escaping from the scintillator with an array of wavelength-shifting (WLS) strips. Using a test set-up comprising a BC-420 scintillator bar and an~array of sixteen BC-482A WLS strips we achieved a spatial resolution of~5\,mm~(σ) for annihilation photons from a 22Na isotope. The studied method can be used to improve the spatial resolution of a plastic-scintillator-based PET scanner which is being developed by the J-PET collaboration.
@article{arxiv.1612.08571,
title = {Measurement of gamma quantum interaction point in plastic scintillator with WLS strips},
author = {J. Smyrski and D. Alfs and T. Bednarski and P. Białas and E. Czerwiński and K. Dulski and A. Gajos and B. Głowacz and N. Gupta-Sharma and M. Gorgol and B. Jasińska and M. Kajetanowicz and D. Kamińska and G. Korcyl and P. Kowalski and W. Krzemień and N. Krawczyk and E. Kubicz and M. Mohammed and Sz. Niedźwiecki and M. Pawlik-Niedźwiecka and L. Raczyński and Z. Rudy and P. Salabura and M. Silarski and A. Strzelecki and A. Wieczorek and W. Wiślicki and J. Wojnarska and B. Zgardzińska and M. Zieliński and P. Moskal},
journal= {arXiv preprint arXiv:1612.08571},
year = {2017}
}
Comments
13 pages, 8 figures; Submitted to Nuclear Instruments and Methods in Physics Research Section A