Abstract: In this paper, colorless and transparent Ce³⁺ activated borogermanate scintillating glass was prepared in air atmosphere by traditional melt-quenching method. The total content of GeO₂ and Gd₂O₃ in the borogermanate scintillating glass is 85%, and the measured density is about 5.82 g/cm³. The linear transmittance of the glass scintillator is more than 80% in the wavelength range of 450 nm to 800 nm. A small amount of tartaric acid (C₄H₆O₆) was added as a strong reducing agent to reduce the production of Ce⁴⁺. The fluorescence decay characteristics of Ce³⁺ in the borogermanate scintillating glass at 340 nm excitation wavelength were studied under different dosage of tartric acid, and the optimal dosage of tartric acid was also determined. In addition, the light yield of borogermanate scintillating glass was rarely reported before. In this work, the light yield of the prepared Ce³⁺ activated borogermanate scintillating glass is measured as 27 ph/MeV, and the high density Ce³⁺ activated borogermanate scintillating glass has a minimum decay time of about 14.40 ns. It can be predicted that the prepared borogermanate scintillation glass with high density and fast decay time has great development potential in the fields of high energy physics and medicine imaging.

Key words: glass scintillator, borogermanate glass, Ce³⁺, tartaric acid, light yield, decay time