放射性气态光源自吸收效应研究  

作　　者：李思杰 马俊平 平杰红[1] 唐显[1] 孙玉华[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《科技创新与应用》2020年第1期58-60,共3页Technology Innovation and Application

摘　　要：放射性气态光源是利用密封在玻璃腔内的放射性气体衰变发出的β射线激发附着在玻璃管内壁上的荧光涂层而发光,根据发光机制,放射性光源的自吸收效应是影响光输出特性的因素之一,包括气体对β粒子能量的自吸收、放射源在荧光层中的沉积能量和荧光层对光输出的自屏蔽三个方面。研究和优化放射性光源的自吸收效应,是提高放射性气态光源的光亮度的研究重点。文章对此三方面进行理论分析,结果表明,放射性气态光源的自吸收效应随着放射性气体压力和荧光层厚度的增加而越来越明显,导致其光输出特性的减弱;通过对涂层结构的优化,降低了放射性光源自吸收效应的影响。The gas-filled radio luminescent light source(GRLS)emits light by using theβ-ray emitted the decay of the radioactive gas,which sealed in the glass tube to excite the phosphor coating attached to the inner wall of the glass.According to the illuminating mechanism,the self-absorption effect of the radioactive light source is the most important factor affecting the light output characteristics.In order to improve conversion rate from the radiant energy to the light energy,the self-absorption effect of GRLS was studied and optimized,by combining theoretical analysis and experimental verification.The results show that the self-absorption effects of GRLS including the self-absorption of theβenergy of the radioactive gas and the phosphor layer,and it becomes more and more obvious as the increase of the gas pressure and the thickness of phosphor layer,resulting in the decrease of the light output characteristics.By optimizing the structure of the coating,the self-absorption effect of GRLS was reduced.

关 键 词：放射性光源 自吸收效应 光输出 光亮度 

分 类 号：TL921[核科学技术—核燃料循环与材料]