Multigap RPC time resolution to 511 keV annihilation photons

G. Belli, M. Gabusi, G. Musitelli, R. Nardò, S. P. Ratti, A. Tamborini, P. Vitulo

Research output: Contribution to journalArticlepeer-review


The time resolution of Multigap Resistive Plate Chambers (MRPCs) to 511 keV gamma rays has been investigated using a 22Na source and four detectors. The MRPCs time resolution has been derived from the Time-of-Flight information, measured from pairs of space correlated triggered events. A GEANT4 simulation has been performed to analyze possible setup contributions and to support experimental results. A time resolution (FWHM) of 312 ps and 376 ps has been measured for a single MRPC with four 250 μm gas gaps by considering respectively one and two independent pairs of detectors. These values, endorsed by the GEANT4 simulation, represent a good result compared to those reported in the literature.

Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - May 1 2015


  • Gaseous detectors
  • Multigap Resistive Plate Chambers (MRPCs)
  • Positron Emission Tomography (PET)
  • Time-of-Flight (ToF)

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics


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