Abstract

The effect of neutron irradiation on the photoacoustic spectra of Er₂O₃ and Nd₂O₃ in powder form has been studied. The irradiation shows a quenching effect on the photoacoustic signal which regains its intensity after a lapse of some time. It is believed that the irradiation changes the oxidation state of the rare-earth ions from M³⁺ to M²⁺. The half-life of the recovery process Er²⁺ to Er³⁺ in the case of irradiated Er₂O₃ is found to be 46 h.

Impact of rare earth element clusters on the excited state lifetime evolution under irradiation in oxide glasses

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