Ultrafast(600 ps)α-ray scintillators  

作　　者：Richeng Lin Yanming Zhu Liang Chen Wei Zheng Mengxuan Xu Jinlu Ruan Renfu Li Titao Li Zhuogeng Lin Lu Cheng Ying Ding Feng Huang Xiaoping Ouyang 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Materials,Sun Yat-Sen University,Guangzhou 510275,China [2]State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center,Northwest Institute of Nuclear Technology,Xi’an 710024,China [3]School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China [4]CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Key Laboratory of Nanomaterials,Fujian Institute of Research On the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [5]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China.

出　　处：《PhotoniX》2022年第1期350-361,共12页智汇光学（英文）

基　　金：supported by the Foundation for Distinguished Young Talents in Higher Education of Guangdong(2021B1515020105);China Postdoctoral Science Foundation(No.2021M693597,BX2021385).

摘　　要：Large-size scintillators with high efficiency and ultrafast radiation fluorescence have shown more potential in the applications to ionizing radiation detection of medical diagnosis,nuclear control and high-energy physics.Currently,although traditional scintillators have made tremendous progress in scintillation efficiency,there are still challenges left in fluorescence lifetime.Faced with that problem,we adopted 2-inch ZnO as the substrate and doped gallium as activator to realize an ultrafast fluorescence excited byα-ray,of which the decay time is only 600 ps that is the shortest scintilla-tion decay time reported so far.The results show that the shallow donor related with gallium not only effectively suppresses band-edge self-absorption,but makes ultrafast radiation possible,which gets gallium-doped ZnO as a potential scintillator for high-quality ultrafast dynamic imaging proved.

关 键 词：SCINTILLATORS Gallium doped zinc oxide Decay time RADIOLUMINESCENCE 

分 类 号：TN2[电子电信—物理电子学]