Dosimeter properties of Ce and Eu doped LiCaAlF6

• Optical, scintillation, OSL, and TSL properties of Ce or Eu differently doped LiCaAlF6 were studied.
• PL quantum yield of Ce and Eu doped LiCaAlF6 showed 40% and 100%, respectively.
• OSL was observed in Ce-doped LiCaAlF6.
• TSL was observed in both material systems and exhibited a good dose response from 1 to 1000 mGy.

Optical, scintillation properties, optical stimulated luminescence, and thermally stimulated luminescence of Ce 1, 3, and 5% doped and Eu 1, 1.5, and 2% doped LiCaAlF6 crystals fabricated by Tokuyama Corp. were investigated. In transmittance, absorption was proportional to dopant concentrations and typical optical quantum yield of Ce and Eu-doped LiCaAlF6 were 40 and 100%, respectively. Scintillation wavelength and decay time profiles were investigated under X-ray irradiation. Ce3+ and Eu2+ 5d-4f luminescence appeared around 300 nm and 370 nm with typical decay time of 40 ns and 1.5 μs, respectively. Optically stimulated luminescence of Ce-doped ones appeared under 405 nm stimulation with detectable intensity while those of Eu doped ones were quite weak. Thermally stimulated luminescence of Ce- and Eu-doped LiCaAlF6 were enough strong and they exhibited good response function from 1 to 1000 mGy exposure.