Na<sub>2</sub>O-Gd<sub>2</sub>O<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub>-P<sub>2</sub>O<sub>5</sub> glass scintillator doped with Dy<sup>3+</sup>: X-rays and proton responses
N. Wantana, E. Kaewnuam, Y. Tariwong, Nguyen Duy Quang, P. Pakawanit, C. Phoovasawat, Naratip Vittayakorn, S. Kothan, H. J. Kim, J. Kaewkhao
Abstract
Abstract Dy 3+ :Na 2 O-Al 2 O 3 -Gd 2 O 3 -P 2 O 5 (Dy:NAGP) glasses were fabricated to investigate the capability for radiation responses. The influence of Dy 2 O 3 concentration on glass properties was studied. The density and effective atomic number of glass increased with the addition of Dy 2 O 3 content. The glasses absorbed the photons in the ultraviolet, visible light, and near-infrared region. In photoluminescence (PL) spectra, the obvious yellow emission at 574 nm and blue emission at 482 nm of Dy 3+ were both generated by the direct excitation and the Gd–Dy energy transfer. The PL decay time of glasses was in the millisecond order. There was thermal quenching observed in temperature-dependent luminescence (TDL). The radioluminescence (RL) and protonluminescence (PrL) represented the emission pattern of Dy 3+ similarly to PL spectra. The concentration quenching caused 0.50Dy:NAGP glass with the highest PL and RL emission intensity. The X-ray imaging of developed glass using a synchrotron light source was successfully imaged for the first time.