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Eu2O3 doped silicoborate glasses for scintillation material application: Luminescence ability and X-ray imaging
Author(s)
Intachai, N.
Kothan, S.
Wantana, N.
Kaewjaeng, S.
Pakawanit, P.
Kanjanaboos, P.
Phuphathanaphong, N.
Kim, H. J.
Kaewkhao, J.
Date Issued
December 1, 2023
Type
Article
Abstract
The glass samples were prepared by melt quenching method and changing Eu2O3 concentrations following component of xEu2O3 - 40Na2O - 7.5Gd2O3 - 5SiO2 - (47.5-x)B2O3 (x = 0, 1, 2, 3 mol %). Density and molar volume tend to increase with increasing Eu2O3 concentrations, corresponding to the larger non-bridging oxygen. Fourier transform infrared spectra (FTIR) results point out that the majority BO3 borate group. The absorption spectra were represented in the length of UV-Vis and NIR region. The phonon energy of 3Eu:7.5Gd was 1280.54 cm−1, related to the borate glass host. The photoluminescence and X-ray-induced luminescence spectra of 3Eu:7.5Gd glass showed similar highest intensity at 613 nm (5D0→7F2). The photoluminescence quantum yield (PLQY) of 3Eu:7.5Gd glass shows the highest value at 85.70 %. The scintillation efficiency of 3Eu:7.5Gd glass was 17.51 % of bismuth germanate (BGO) crystal. The decay time owing to Eu3+ emission is 2.054 ms for 2Eu:7.5Gd glass. The highest energy transfer efficiency was 2 mol % of Eu2O3 concentrations (ηET = 70 %). The CIE chromaticity coordinates of the glasses are placed in the reddish-orange area (0.65, 0.35). The spatial resolution of X-ray imaging study was 10 lp/mm. These results suggest that 3 mol % of Eu2O3 doped silicoborate glass is capable of being a scintillator applied in the X-ray imaging system.
Citation
Optik, 294, 2023