酒石酸添加对Ce^(3+)激活硼锗酸盐闪烁玻璃发光性能的影响

Effect of Tartaric Acid Addition on Luminescence Properties of Ce^(3+)Activated Borogermanate Scintillating Glass

本文采用传统的高温熔融法在空气气氛中制备了无色透明的Ce^(3+)激活硼锗酸盐闪烁玻璃,该硼锗酸盐闪烁玻璃中GeO_(2)和Gd_(2)O_(3)总含量为85%,测得其密度在5.82 g/cm^(3)左右,且在450~800 nm线性透过率可达80%以上。加入少量的酒石酸(C_(4)H_(6)O_(6))作为强还原剂以减少Ce^(4+)的产生,研究了在不同酒石酸添加量下硼锗酸盐闪烁玻璃中Ce^(3+)在340 nm激发波长下的荧光衰减特性,确定了酒石酸的最佳添加量。此外,硼锗酸盐闪烁玻璃鲜有光产额方面的报道,本文测得制备的Ce^(3+)激活硼锗酸盐闪烁玻璃的光产额为27 ph/MeV,且该高密度Ce^(3+)激活硼锗酸盐闪烁玻璃具有最短约14.40 ns的衰减时间。可以预见,该高密度、快闪烁硼锗酸盐闪烁玻璃在高能物理和医学成像等领域有着巨大的发展潜力。

In this paper,colorless and transparent Ce^(3+)activated borogermanate scintillating glass was prepared in air atmosphere by traditional melt-quenching method.The total content of GeO_(2)and Gd_(2)O_(3)in the borogermanate scintillating glass is 85%,and the measured density is about 5.82 g/cm 3.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(C_(4)H_(6)O_(6))was added as a strong reducing agent to reduce the production of Ce 4+.The fluorescence decay characteristics of Ce^(3+)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 Ce^(3+)activated borogermanate scintillating glass is measured as 27 ph/MeV,and the high density Ce^(3+)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.