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We have measured the X-ray induced emission spectra, the photoelectron yields/MeV gamma ray energy, and the scintillation decay times of BaF2 doped with 0. 002 to 10 mol% Ce3+. The results will be compared with results obtained for pure BaF2 and La3+ doped BaF2 crystals. A model for the scintillation mechanisms in these crystals will be proposed which explains qualitatively the influence of the type of doping and its concentration on the wavelength dependence and time dependence of the scintillation light output.

The scintillation properties of Lu3Al5-xScxO12 single garnet crystals doped with different concentrations of Sc3+ were investigated. The best scintillation properties were obtained for the crystal with x = 0.2 in the melt. This crystal has a broad (FWHM ∼1 eV) ultraviolet emission band with a maximum at 275 nm. An energy resolution of 7% is observed for the 662 keV photopeak. The main decay component of the scintillation pulse has an exponential decay time of about 600 ns and accounts for 90% of the total light yield. The total scintillation light yield was found to be about 22,500 ph/MeV. Within 10% a linear response was obtained in the energy interval from 8 keV to 1.3 MeV.