More Y K, Wankhede S P, Moharil S V, Kumar Munish, Chougaonkar M P
Department of Physics, Nagpur University, Nagpur, 440033, India.
Department of Physics, K.D.K. College of Engineering, Nagpur, 440009, India.
Luminescence. 2015 Sep;30(6):878-82. doi: 10.1002/bio.2836. Epub 2015 Jan 26.
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.
报道了LiCaAlF6:Eu(2+)的光激发发光（OSL）结果。使用蓝色（470 nm）激发记录的连续波OSL信号约为标准磷光体磷酸锂镁的31%。标准磷光体磷酸锂镁的OSL耗尽率与LiCaAlF6:Eu(2+)相比仅低三倍。对于LiCaAlF6:Eu(2+)，在近紫外区域观察到强的光致发光（PL），在254 nm激发下，其特征性的Eu(2+)发射峰位于369 nm。LiCaAlF6:Eu(2+)的热释光（TL）发光峰在约180°C处观察到。该发光峰比著名的热释光剂量计（TLD）磷光体LiF-TLD 100的剂量峰强度约高六倍。因此，这种磷光体值得比目前更多的关注，并且可能作为辐射剂量学中的剂量材料有用。
