硅酸铋——一种快计时重闪烁新型多功能晶体材料

Bi4Si3O12:an Important Heavy Scintillation with Fast Decay Time and New Multi-functional Crystal Materials

硅酸铋(Bi 4Si 3O 12,BSO)晶体是一种新型的闪烁晶体,具有高辐射硬度、短衰减时间、低成本等优点,作为闪烁材料近年来引起了人们的极大关注。BSO晶体短的紫外吸收边能更好地分离Cherenkov光和闪烁光,并有效收集Cherenkov光信号,使其成为未来双读出量能器和均匀强子量能器的最佳候选材料。稀土离子掺杂BSO晶体在LED和激光等方面表现出优良的性能,被认为是一种不错的发光二极管和激光晶体材料。尽管BSO晶体是一种综合性能指标非常优异的多功能晶体,但该晶体迄今为止还没有被真正应用于实际生产中。随着大尺寸BSO晶体生长技术的突破以及稀土离子掺杂BSO晶体闪烁性能的提升,该晶体独特的双读出性能和极具优势的价格使其在高能物理、核医学成像等粒子探测和LED、激光等方面展现出巨大的应用潜力。

BSO crystal is a new type of scintillation crystal,with high radiation hardness,short decay time,low cost advantages,and as a scintillation material,it has aroused people’s great attention in recent years.BSO crystal is one of the best candidate materials for homogeneous hadron calorimeters and dual-readout calorimeters because of its short ultraviolet absorption edge can better separate the Cherenkov light and scintillation light and collect Cherenkov light signal effectively.Rare earth ions doped BSO crystals are considered to be a good light-emitting diodes(LED)and laser crystal materials due to its excellent performances in LED and laser applications.Although the BSO crystal is a multifunctional crystal with excellent comprehensive performance,it has not been used in actual production so far.With the breakthrough of large-size BSO crystal growth technology and the improvement of the scintillation performance of rare earth ion-doped BSO crystals,its unique performance of dual-rea-dout and most advantage in price show a great potential in high-energy physics,nuclear medical imaging,laser application aspects and LED,etc.