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.