Effect of X-Ray Radiation on the Valence State of Europium in Y2O3:Eu3+ Phosphor

摘要

The effect of X-ray radiation on the valence state of europium ions in the Y2O3 matrix was studied by EPR. The alternation of the charge of europium ions (Eu3+ -> Eu2+ -> Eu3+) in the Y2O3 structure was detected. The mechanism of europium reduction to the divalent state under the action of X-ray irradiation is described.