采用真空烧结固相反应法,分别制备了不添加和添加烧结助剂(正硅酸乙酯TEOS和MgO)的Pr∶LuAG(Pr∶Lu3Al5O12)陶瓷,研究发现添加烧结助剂烧制的Pr∶LuAG陶瓷在可见光区的直线透过率可达～80％,不添加烧结助剂的陶瓷光学透过率降低(可见光区～70％,2 mm厚),但光输出提高了5倍(为1196 pe/MeV),衰减快分量比例可达73％,能量分辨率8.4％.将Pr∶LuAG陶瓷加工成1.9 mm×1.9 mm× l.0 mm的陶瓷阵列组装探测器模块,用4×4陶瓷阵列单元实现了二维散点图成像,所成散点图清晰可辨.经过平台测试,相同耦合条件下本实验制备的Pr∶LuAG陶瓷成像质量优于商用BGO (Bi4Ge3O12)单晶,结果显示Pr∶LuAG陶瓷有望应用于PET (Positron Emission Tomography)级别核医学成像系统.
参考文献
| [1] | NIKL M,VEDDA A,LAGUTA V V.Single-Crystal Scintillation Materials Springer Handbook of Crystal Growth.In:Dhanaraj G,Byrappa K,Prasad V,Dudley M,editors.:Springer Berlin Heidelberg; 2010:1663-1700. |
| [2] | CONTI M.State of the art and challenges of time-of-flight PET.Physica Medica.,2009,25(1):1-11. |
| [3] | SWIDERSKI L,MOSZYNSKI M,NASSALSKI A,et al.Scintillation properties of praseodymium doped LuAG scintillator compared to cerium doped LuAG,LSO and LaBr3.IEEE Transactions on Nuclear Science,2009,56 (4):2499-2505. |
| [4] | CONTI M,ERIKSSON L,ROTHFUSS H,et al.Comparison of fast scintillators with TOF PET potential.IEEE Transactions on Nuclear Science,2009,56(3):926-933. |
| [5] | NIKL M,OGINO H,KRASNIKOV A,et al.Photo-and radioluminescence of Pr-doped Lu3Al5O12 single crystal.Phys.Status Solidi A-Appl Res.,2005,202(1):R4-R6. |
| [6] | YANAGIDA T,YOSHIKAWA A,YOKOTA Y,et al.Development of Pr∶LuAG scintillator array and assembly for positron emission mammography.IEEE Transactions on Nuclear Science,2010,57(3):1492-1495. |
| [7] | OGINO H,YOSHIKAWA A,NIKL M,et al.Scintillation characteristics of Pr-doped Lu3Al5O12 single crystals.Journal of Crystal Growth,2006,292 (2):239-242. |
| [8] | NIKL M,PEJCHAL J,MIHOKOVA E,et al.Antisite defect-free Lu3(GaxAl1-x)5O12 ∶ Pr scintillator.Applied Physics Letters,2006,88(14):141916--1-3. |
| [9] | PEJCHAL J,NIKL M,MIHOKOVA E,et al.Pr3+-doped complex oxide single crystal scintillators.Journal of Physics D:Applied Physics,2009,42(5):055117-1-10. |
| [10] | FENG XI-QI.Anti-site defects in YAG and LuAG crystals.Journal of Inorganic Materials,2010,25(8):785-794. |
| [11] | SHEN Y,SHI Y,FENG X,et al.The harmful effects of sintering aids in Pr:LuAG optical ceramic scintillator.Journal of the American Ceramic Society,2012,95(7):2130-2132. |
| [12] | SHI Y,NIKL M,FENG X,et al.Microstructure,optical,and scintillation characteristics of Pr3+ doped Lu3 Al5O12 optical ceramics.Journal of Applied Physics,2011,109(1):013522-1-7. |
| [13] | SHI Y,FENG X Q,PAN Y B,et al.Fabrication and photoluminescence characteristic of Pr:LuAG scintillator ceramics.Radiation Measurements,2010,45(3-6):457-460. |
| [14] | JIANG S,LU T,CHEN J.Ab initio study the effects of Si and Mg dopants on point defects and Y diffusion in YAG.Computational Materials Science,2013,69:261-266. |
| [15] | LIU S,FENG X,ZHOU Z,et al.Effect of Mg2+ Co-doping on the scintillation performance of LuAG:Ce ceramics.Physica Status Solidi (RRL),2014,8(1):105-109. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%