Optically stimulated luminescence in LiCaAlF₆:Eu²⁺ phosphor

Abstract

Results on optically stimulated luminescence (OSL) in LiCaAlF6:Eu(2+) 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:Eu(2+). Strong photoluminescence (PL) in the near ultraviolet region is observed for LiCaAlF6:Eu(2+) with the characteristic Eu(2+) emission at 369 nm for 254 nm excitation. The thermoluminescence (TL) glow peak for LiCaAlF6:Eu(2+) 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.

Effect of co-doping on luminescence of LiCaAlF6:Eu phosphor

“…Single crystals have been almost invariably obtained in vacuum/argon atmosphere and used in TL experiments. On the other hand, microcrystalline powders used in our work [31,32,35] have been obtained from samples melted in air. Nature of defects in these samples obtained by various methods could be different.…”

Comparison of thermoluminescence characteristics in γ‐ray and C5+ ion beam‐irradiated LiCaAlF6:Ce phosphor

“…Ce 3+ -activated LiCaAlF 6 is a well-known phosphor with diverse applications in solid-state tunable lasers and scintillators (15)(16)(17)(18)(19). A lot of work has been done on colquirite-type LiCaAlF 6 phosphors explaining their Photoluminescence (PL), Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) properties triggered by different activator ions (20)(21)(22)(23)(24). However, no studies on ion-beam irradiated LiCaAlF 6 :Ce have been found.…”