High-energy-resolution scintillator: Ce3+ activated LaCl3

The scintillation properties of ${\mathrm{LaCl}}_{\mathrm{3}}$ doped with 10% ${\mathrm{Ce}}^{\mathrm{3+}}$ are presented. Under optical and gamma ray excitation, ${\mathrm{Ce}}^{\mathrm{3+}}$ emission is observed to peak at 330 and 352 nm. The scintillation light output is $\text{46\hspace{0.05em}000±1000}$ photons/MeV at 662 keV. Forty percent is emitted with a decay time of 26 ns, 30% with 210 ns, and 30% with about 1000 ns. An energy resolution (full width at half maximum over the peak position) of $\text{3.3±0.3\%}$ was observed for the 662 keV full absorption peak.