Transparent K3LuF6single crystals doped with rare earth ions were successfully grown by the micro-pulling down method (μ-PD). X-ray diffraction measurements showed that the as-grown crystals possess monoclinic structure with P21/n space group. The radio- and photoluminescence spectra of the grown crystals were measured in the vacuum ultraviolet (VUV) and ultraviolet (UV) region. The intrinsic luminescence of K3LuF6 was observed at 163 and 200 nm. Nd-doped crystals displayed, in contrast, emission at 183 nm, due to the Nd 3+ 5d-4f transition, and their radioluminescence intensity increases with increasing Nd concentration. Tm:K3LuF6 showed high emission intensity at 190 nm in the radio- and photoluminescence spectra (λexc = 155 nm). Moreover, the emission intensity of 0.5%Tm:K3LuF 6was higher than that of 5%Tm:K3LuF6. Concerning Er:K3LuF6, the emission at 165 nm was detected for the0.5%Er:K3LuF6.
- 5d-4f emission
- Crystal growth
- Fluoride scintillator
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering