Photoluminescence and scintillation properties of Eu-doped Ga₂O₃ single crystals grown by the floating zone method

Abstract

We developed undoped, Eu 1%-, 3%-, and 10%-doped Ga2O3 samples by the floating zone method to evaluate their photoluminescence and scintillation properties. The photoluminescence of the undoped, Eu 1%-, and 3%-doped samples showed intense host emission in the UV–vis range, while the Eu 10%-doped sample exhibited strong emission at 700–800 nm. In the scintillation spectra obtained upon X-ray excitation, host emission was observed in all the samples, and the Eu-doped ones exhibited some sharp emission lines due to the 4f–4f transitions of Eu3+. Among the samples investigated, the Eu 1%-doped sample showed the highest emission intensity for both scintillation and thermally stimulated luminescence.

Optical and scintillation properties of Lumilass-G and -R glasses

“…Such an event would be blamed for the main origin of IRF. The main decay component of both Lumilass-G9 and R7 was 1.3 ms, and this value was typical for scintillation of Tb 3+ - 67,68) and Eu 3+ -doped 69,70) phosphors. Scintillation decay times became faster than PL ones, which suggested that some quenching phenomena occurred during the energy transportation process.…”