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PL spectra of -containing specimens, A and C, measured before and after the irradiation followed by annealing in air at for , respectively. The PL spectra were taken from the irradiated surface, C, and the nonirradiated surface, D, of the same specimen. The PL spectrum in the as-irradiated state was also indicated by B. The scales of A, B, and D are enlarged by 10 times so as to fit the scale of C. The dose was .
Energy spectra of particle emitted by the nuclear reaction in the -containing irradiated with ion up to the dose of at room temperature. The energy spectra were measured for the specimen before and after irradiation, and also after irradiation and the subsequent annealing in air at for . For comparison, the measurement was repeated for the nonirradiated surface.
PL spectra of -containing specimens measured before and after the irradiation followed by annealing in air at for .
Dependence of the ratio of PL peak intensity after to before irradiation on the dose and content.
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