Quantum yield and scintillation behaviors of lanthanum barium borate doped with Eu³⁺ ion scintillating glasses

Lanthanum barium borate glasses doped with Eu³⁺ ions were synthesized using a melt quenching method, with a nominal chemical composition of {10La₂O₃–20BaO-(70-x)B₂O₃-xEu₂O₃; 0.0 ≤ x ≥ 7.0} mol%. These glass samples were characterized, including assessments of their physical, structural, optical, and luminescent properties. The emission spectra, both of photoluminescence and radioluminescence studies were presented and found featuring five distinct peaks at 577 nm (⁵D₀→⁷F₀), 590 nm (⁵D₀→⁷F₁), 613 nm (⁵D₀→⁷F₂), 652 nm (⁵D₀→⁷F₃), and 701 nm (⁵D₀→⁷F₄). Interestingly, concentration quenching effects were observed at Eu³⁺ concentrations of 3.0 mol% and 5.0 mol% for photoluminescence and radioluminescence respectively. The decay time of LaBaBEu3.0 show 1.617 ms and the quantum yield reaching value of 14.16%. The CIE 1931 chromaticity coordinates of these glasses show reddish-orange color. This reddish-orange color was particularly observed when the samples were excited under a UV lamp.