新型低密度短寿命铈单掺硼硅酸盐玻璃闪烁材料

A Low-density Ce-singly Doped Borosilicate Glass for Novel Short Lifetime Scintillating Material

硼硅酸盐玻璃在探测领域作为闪烁基质材料具有天然的优势。本研究基于应用需求制备了Ce^(3+)离子掺杂硼硅玻璃闪烁材料60B_(2)O_(3)‐6SiO_(2)‐3Al_(2)O_(3)‐5BaO‐15Na_(2)O‐10La_(2)O_(3)‐1Sb_(2)O_(3)。基于密度和FT‐IR光谱对玻璃的结构进行了分析,结果表明加入的Ce^(3+)离子作为网络修饰体存在。吸收光谱显示该材料紫外吸收边均低于400 nm、光学带隙缩短至2.93 eV,这些因素都有利于提升Ce^(3+)离子在基质材料中的发光特性。采用306 nm泵浦波长,该材料在372 nm处得到了最佳的发射光谱。光学碱度随着Ce^(3+)离子浓度的增加而增加(0.5392~0.5417)的现象与发射光谱的红移结果相吻合。荧光寿命短至24.39 ns,与其他Ce^(3+)离子掺杂玻璃闪烁材料相比具有明显的优势。这些优势为检测领域提供了一种新的材料选择。

Borosilicate glass possess natural advantage using as a scintillating material for detection field.To enrich the application requirements,the Ce3+ions doped borosilicate glass scintillation material 60B_(2)O_(3)-6SiO_(2)-3Al_(2)O_(3)-5BaO-15Na_(2)O-10La_(2)O_(3)-1Sb_(2)O_(3)was prepared.The structure was discussed based on density and FT-IR spectra indicating that the Ce^(3+)ions exist as network modifiers.The ultraviolet(UV)absorption boundary was lower than 400 nm and the optical band gap was shorted to 2.93 eV.All these factors are conducive to the luminescent properties of Ce^(3+)ions.The best emission spectrum was obtained at 372 nm with a 306 nm pumping.The optical basicity was increased with the concentration of Ce3+ions(0.5392-0.5417),which resulted in a light red shift of emission spectra.The fluorescence lifetime was as short as 24.39 ns,which shows obvious advantages compared with other Ce^(3+)ions doped scintillation glass.These results provided a new material choice for the development of the detection field.