Optically stimulated luminescence in LiCaAlF6:Eu2+ phosphor

Results on optically stimulated luminescence (OSL) in LiCaAlF6:Eu2+ are reported. Continuous wave OSL signal as recorded using blue (470 nm) stimulation was found to be ~31% that of standard phosphor lithium magnesium phosphate. The rate of OSL depletion for standard phosphor lithium magnesium phosphate is only three times less as compared with that of LiCaAlF6:Eu2+. Strong photoluminescence (PL) in the near ultraviolet region is observed for LiCaAlF6:Eu2+ with the characteristic Eu2+ emission at 369 nm for 254 nm excitation. The thermoluminescence (TL) glow peak for LiCaAlF6:Eu2+ was observed at around 180°C. The glow peak was about six times more intense compared with the dosimetric peak of the well known thermoluminescence dosimetric (TLD) phosphor LiF-TLD 100. Thus this phosphor deserves much more attention than it has received until now and may be useful as a dosimetric material in radiation dosimetry. Copyright © 2015 John Wiley & Sons, Ltd.