Ultrafast (600 ps) α-ray scintillators

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

Funds: This work was financially supported by the Foundation for Distinguished Young Talents in Higher Education of Guangdong (2021B1515020105), China Postdoctoral Science Foundation (No. 2021M693597, BX2021385).

摘要

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Abstract: 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 by α-ray, of which the decay time is only 600 ps that is the shortest scintillation 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.
- Scintillators /
- Gallium doped zinc oxide /
- Decay time /
- Radioluminescence

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参考文献(35)

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