The scintillation properties of LaBr3 doped with 0.5% Ce3+ are presented. U
nder optical and gamma ray excitation, Ce3+ emission is observed to peak at
356 and 387 nm. The scintillation light output is 61 000 +/- 5000 photons/
MeV at 662 keV. More than 90% is emitted with a decay time of 35 ns. An ene
rgy resolution (full width at half maximum over the peak position) of 2.85%
+/-0.05% was observed for the 662 keV full absorption peak. A time resoluti
on of 385 ps was obtained using BaF2 as second scintillator and gamma rays
of Co-60. (C) 2001 American Institute of Physics.