Title
Dosimeter properties of Ce and Eu doped LiCaAlF6
Author
Takayuki Yanagida, Yutaka Fujimoto, Kenichi Watanabe, Kentaro Fukuda
Year
2014
Journal
Radiation Measurements
Abstract
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.
Instrument
FP-8600
Keywords
Fluorescence, Photoluminescence, Optical properties