Eu:CaF2 — A scintillation material with high optical transparency and low phonon energy Eu:CaF2 — A scintillation material with high optical transparency and low phonon energy Laser Crylink Aug 14 · 2 min read Eu CaF2 Scintillator Crystal Rare earth elements are easily to form clusters in CaF2 crystals, which is beneficial for reducing the doping concentration and maintaining the energy transfer between erbium ions as well. As s one of the phosphors that has efficient excitation in the near UV range, Europium-activated calcium fluoride ( Eu:CaF2 ) is an inert and transparent material with several characteristics that make it attractive for use as a scintillator in radiation detection systems. It has an average light yield of 24,000 photons*MeV–1 and the refractive index is similar to that of many photomultiplier tube windows and optical coupling compounds. Therefore, a high light collection efficiency can often be obtained. Additionall...