Synchrotron X-ray imaging material from high quantum yield Sm3+- doped Li2O−Gd2O3–ZrO2–P2O5 glass
6
Issued Date
2025-12-01
Resource Type
ISSN
0969806X
eISSN
18790895
Scopus ID
2-s2.0-105008511218
Journal Title
Radiation Physics and Chemistry
Volume
237
Rights Holder(s)
SCOPUS
Bibliographic Citation
Radiation Physics and Chemistry Vol.237 (2025)
Suggested Citation
Payungkulanan K., Tungjai M., Wantana N., Chanthima N., Sarumaha C.S., Pakawanit P., Phoovasawat C., Kanjanaboos P., Choodam K., Kim H.J., Kothan S., Kaewkhao J. Synchrotron X-ray imaging material from high quantum yield Sm3+- doped Li2O−Gd2O3–ZrO2–P2O5 glass. Radiation Physics and Chemistry Vol.237 (2025). doi:10.1016/j.radphyschem.2025.113072 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/110942
Title
Synchrotron X-ray imaging material from high quantum yield Sm3+- doped Li2O−Gd2O3–ZrO2–P2O5 glass
Corresponding Author(s)
Other Contributor(s)
Abstract
The fabrication of phosphate glass samples utilized the melt quenching procedure to synthesize the scintillating glass for synchrotron X-ray imaging application. A comprehensive investigation of the physical, optical, structural, photoluminescence, radioluminescence properties, and X-ray imaging was conducted. The findings exhibited that the density and refractive index clearly increased with higher concentrations of Sm<sup>3+</sup> doping. The absorption spectra revealed absorbance in the UV–Vis–NIR regions. The photoluminescence and radioluminescence spectra exhibited the strongest emission intensities at 0.50 mol% of Sm<inf>2</inf>O<inf>3</inf>, with a remarkable photoluminescence quantum yield (PLQY) of 85 %. The Sm<sup>3+</sup> ion revealed its most intense emission peak at 600 nm, relating to the f-f transition (<sup>4</sup>G<inf>5/2</inf> → <sup>6</sup>H<inf>7/2</inf>) of the Sm<sup>3+</sup> ion. The photoluminescence (PL) emission peak of Gd<sup>3+</sup> ions at 311 nm exhibited a decreasing trend with the concurrent increase in Sm<sup>3+</sup> emission intensity. This variation suggests the occurrence of energy transfer from Gd<sup>3+</sup> to Sm<sup>3+</sup> ions. The energy transfer was further confirmed by decay time analysis (λ<inf>Ex</inf> = 275 nm and λ<inf>Em</inf> = 311 nm), which demonstrated a maximum energy transfer efficiency of 66.08 % at a Sm<inf>2</inf>O<inf>3</inf> concentration of 2.00 mol%. The decay time (λ<inf>Ex</inf> = 401 nm and λ<inf>Em</inf> = 600 nm)of Sm<sup>3+</sup> ion was in the millisecond range, dropping from 3.156 to 0.944 ms when increasing of Sm<inf>2</inf>O<inf>3</inf> concentration. The Inokuti-Hirayama (IH) model (S = 6) confirms dipole–dipole interactions as the primary energy transfer mechanism among Sm<sup>3+</sup> ions. Radioluminescence measurements revealed an integral scintillation efficiency of 55.39 % relative to the standard BGO crystal. High-resolution X-ray imaging using synchrotron radiation demonstrated a spatial resolution of 10 lp/mm and a modulation transfer function (MTF) of 0.46 at this frequency. These findings validate the potential of Sm<sup>3+</sup>-doped phosphate glass as a promising candidate for synchrotron X-ray imaging scintillators.