Growth and Luminescence Properties of Ce and Ca co-doped LiGdF4-L.1T Eutectic Scintillator

摘要

Ce and Ca co-doped LiGdF4-LiF eutectics were grown and their directionally solidified eutectic (DSE) system has been investigated. In these eutectics, apart from the expected 305 nm emission of the regular Ce ,310 nm emission of the Gd~(3+) and Ce -perturbed emission around 320-380 nm was observed. Ce -perturbed emission at 340 nm shows the intrinsic decay time of about 27 ns. In photoluminescence mechanism the observed decay time shortening of the regular Ce~(3+) and Gd~(3+) centers point to the energy transfer in the sequence the regular Ce~(3+)—> (Gd~(3+))_n—> the perturbed Ce~(3+) sites.