Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 701, Issue -, Pages 235-242Publisher
ELSEVIER
DOI: 10.1016/j.nima.2012.11.009
Keywords
Fast timing; CeBr3; Inorganic scintillators; Time resolution; Fast photomultiplier tubes; Photonis XP20D0; Hamamatsu R9779
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Funding
- Comunidad de Madrid [ARTEMIS S2009/DPI-1802]
- Complutense University (Grupos UCM) [910059]
- CDTI under the CENIT Programme (AMIT Project)
- Spanish Ministry of Science and Innovation [FPA2010-17142, CSD-2007-00042]
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We report on the time response of a novel inorganic scintillator, CeBr3. The measurements were performed using a cylindrical crystal of 1-in, in height and 1-in, in diameter at Na-22 and Co-60 photon energies. The time response was measured against a fast reference BaF2 detector. Hamamatsu R9779 and Photonis XP20D0 fast photomultipliers (PMTs) were used. The PMT bias voltages and Constant Fraction Discriminator settings were optimized with respect to the timing resolution. The Full Width at Half Maximum (FWHM) time resolution for an individual CeBr3 crystal coupled to Hamamatsu PMT is found here to be as low as 119 ps at Co-60 energies, which is comparable to the resolution of 107 ps reported for LaBr3(Ce). For 511 keV photons the measured FWHM time resolution for CeBr3 coupled to the Hamamatsu PMT is 164 ps. (C) 2012 Elsevier B.V. All rights reserved.
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