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首页> 外文会议>Penetrating Radiation Systems and Applications VII; Proceedings of SPIE-The International Society for Optical Engineering; vol.6707 >Nanosized Grain Polycrystalline Scintillators for Special Nuclear Materials Detection
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Nanosized Grain Polycrystalline Scintillators for Special Nuclear Materials Detection

机译：用于特殊核材料检测的纳米晶粒多晶闪烁体

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摘要

The aim of this work was to explore the limits of polycrystalline ceramic scintillator in countering the nuclear threat. The goal was to develop a polycrystalline LaBr_3:Ce, which can be processed from ceramic forming techniques and can be produced in large size scintillator panels with lower cost and high production rate. Three high purity raw powders were used as the starting materials including LaBr_3, LaCl_3, and CeBr_3. Powder characteristics were measured. A melt spinning method was used to synthesize the nanoparticle LaBr_3:Ce with stoichiometric compositions. The synthesized nanoparticles were characterized and the average particle size of the synthesized nanoparticle LaBr_3 : Ce was about 50 nm. The melt spun powders were consolidated using a "Nanosintering" method to achieve a high density while maintaining the stoichiometric composition. The grain size of the sintered polycrystalline is about 50 nm, which shows no grain growth during the densification process.
机译：这项工作的目的是探索多晶陶瓷闪烁体在应对核威胁方面的局限性。目的是开发一种多晶LaBr_3：Ce，该多晶LaBr_3：Ce可以通过陶瓷成型技术进行加工，并且可以以较低的成本和较高的生产率在大型闪烁体面板中生产。三种高纯原料粉末用作原料，包括LaBr_3，LaCl_3和CeBr_3。测量粉末特性。使用熔体纺丝法合成具有化学计量组成的纳米颗粒LaBr_3：Ce。表征了合成的纳米颗粒，并且合成的纳米颗粒LaBr_3：Ce的平均粒径为约50nm。使用“纳米烧结”方法将熔融纺丝粉末固结，以在保持化学计量组成的同时实现高密度。烧结的多晶的晶粒尺寸为约50nm，这在致密化过程中没有晶粒生长。

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