E. V. D. van Loef, P. Dorenbos, C. W. E. van Eijk, K. Krämer and H. U. Güdel
High-energy-resolution scintillator: Ce³⁺ activated LaBr₃
Appl. Phys. Lett. 79, 1573-1575 (2001)                 

Abstract: The scintillation properties of LaBr₃ doped with 0.5% Ce³⁺ are presented. Under optical and gamma ray excitation, Ce³⁺ emission is observed to peak at 356 and 387 nm. The scintillation light output is 61000±5000 photons/MeV at 662 keV. More than 90% is emitted with a decay time of 35 ns. An energy 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 resolution of 385 ps was obtained using BaF₂ as second scintillator and gamma rays of ⁶⁰Co.