Scintillation and optical stimulated luminescence of Ce-doped CaF2

• Optical, scintillation, and OSL properties of Ce 0.1–20% doped CaF2 were studied.
• Scintillation light yield exhibited inverse proportionality to Ce concentrations.
• OSL intensities showed proportionality to Ce concentrations.
• Complementary relation of scintillation and OSL was experimentally confirmed.

Scintillation and optical stimulated luminescence of Ce 0.1–20% doped CaF2 crystals prepared by Tokuyama Corp. were investigated. In X-ray induced scintillation spectra, luminescence due to Ce3+ 5d–4f transition appeared around 320 nm with typically 40 ns decay time. By 241Am 5.5 MeV α-ray irradiation, 0.1% doped one showed the highest scintillation light yield and the light yield monotonically decreased with Ce concentrations. Optically stimulated luminescence after X-ray irradiation was observed around 320 nm under 550 or 830 nm stimulation in all samples. As a result, intensities of optically stimulated luminescence were proportional to Ce concentrations. Consequently, scintillation and optically stimulated luminescence resulted to have a complementary relation in Ce-doped CaF2 system.