准单能直流硬X射线装置的研制  

The Foundation of Quasi-mono-energy Continuous Hard X-ray Unit

作　　者：周海生[1] 罗剑辉[1,2] 马戈[1] 魏福利[1,2] 夏惊涛[1,2] 唐波[1] 

机构地区：[1]西北核技术研究所,西安710024 [2]强脉冲辐射模拟与效应国家重点实验室,西安710024

出　　处：《核电子学与探测技术》2015年第9期904-908,共5页Nuclear Electronics & Detection Technology

基　　金：武器装备预研重点基金(914A11050910ZW501)资助

摘　　要：以直流X射线光机为基础,利用元素具有特征X射线和吸收边的原理,通过设置荧光靶、滤光片,滤除不同元素K层特征线中的K_β线,研制了准单能直流硬X射线装置。该装置由直流X光机、荧光靶和滤光片组成,可产生十多种准单能X射线,X射线谱纯度大于80%,能峰宽小于3 ke V。各能点转换便利,强度可调,束流稳定性小于0.5%。该装置可部分代替放射源,用于测厚、探测器灵敏度标定、透过率标定等。According to characteristic X - ray emission lines and characteristic X - ray absorption edges, a quasi -mono- energy continuous hard X- ray unit was founded base on continuous X -ray generator. When the characteristic lines transmit filters, the Kβ lines are eliminated, so the spectra purity is increased. The unit which made up of X - ray generator and fluorescence targets and filters, produces scores of quasi - mono - ener- gy X - rays. The X - rays spectra purity is more than 80%, spectra width is less than 3 keV. X - ray radiation intensity is adjustable and beam instability is less than 0.5%o. The unit can displace radioactive isotopes in mass thickness measurement, calibration of detectors sensitivity, transmissibility measurement, etc.

关 键 词：直流 特征X射线 滤光片 准单能 

分 类 号：O582[理学—物理] TL929[核科学技术—核燃料循环与材料]