부산대학교 도서관

The optical, photo, and X‐ray luminescence properties of Sm3+ion‐doped Li2O–Al2O3–Gd2O3–B2O3–P2O5glasses are evaluated. The glasses are fabricated by the melt quenching technique. The absorption spectra exhibit the hypersensitive transitions 6H5/2→6P3/2and 6H5/2→6F7/2at the visible and near‐infrared range respectively. The glasses display four major transitions characteristic of Sm3+ion for photoluminescence and X‐ray luminescence, with the most intense one corresponding to the 4G5/2→6H7/2transition. The best emitting samarium concentration obtained by X‐ray excitation is compared to BGO crystals. The integral scintillation efficiency of glass is determined by total area under all of peak spectrum. The results indicate the promising application of these glasses in scintillators and for X‐ray sensing devices. The optical, photo, and X‐ray luminescence properties of Sm3+ion‐doped Li2O–Al2O3– Gd2O3–B2O3–P2O5glasses fabricated by melt quenching are discussed. The highest emission intensity is 1.0 mol% excited by photon and 0.5 mol% by X‐ray. This is due to the resonant energy transfer process quenching of the Sm3+ion at increasing concentrations and the cross‐relaxation process interactions.