Effect of Gd₂O₃ in Li₂O–AlF₃–CaF₂–P₂O₅–Eu₂O₃ glasses for laser medium and X-rays detection material applications

The glass formula of 20Li₂O+10AlF₃+2.5CaF₂+(66.5-x)P₂O₅+xGd₂O₃+1Eu₂O₃ (PLACEu₁Gd_x), where x = 2,4,6,8,10 mol% have been prepared by conventional melt-quenching technique. These glasses' optical absorption, photoluminescence, decay time, and radioluminescence have been measured at room temperature. Judd-Ofelt's (J-O) analysis of PLACEu₁Gd₈ has been investigated and the magnitude of parameters follows the trend as Ω₂>Ω₄>Ω₆. The important laser parameters such as radiative properties are calculated using J-O parameters and luminescence spectra. The decay time with the transition from the ⁵D₀ level was estimated under 274 nm and 394 nm excitation using bi-exponential fitting. CIE coordinates, CCT and intensity ratio have been calculated for glass samples. The integral scintillation efficiency of PLACEu₁Gd₈ is 31% compared with BGO crystal. The PLACEu₁Gd_x glasses are promising for laser medium and x-rays detection material applications.