野外高灵敏度X射线荧光测量系统研究  

RESEARCH ON FIELD, HIGHLY SENSITIVE X RAY FLUORESCENCE SYSTEM

作　　者：李国栋[1,2] 贾文懿[1,2] 周蓉生[1,2] 唐红[1,2] 方方[1,2] 马英杰[1,2] 

机构地区：[1]成都理工学院系核原料与核技术工程系 [2]四川省地学核技术重点实验室

出　　处：《成都理工学院学报》1998年第1期13-20,共8页Journal of Chengdu University of Technology

基　　金：地质矿产部"八五"重点地质科技项目

摘　　要：针对现行轻便型Ｘ射线荧光仪灵敏度低、检出限差、测定元素少、基体效应校正能力弱等问题，从激发源、探测器、测量电路、微机化四个关键环节入手进行了研究。研制了微型低功率Ｘ射线管激发源；研制了低功耗１０２４道分析器，将其与高分辨率半导体探测器配合，实现了高分辨率Ｘ射线荧光探测；研究和实现了以笔记本式微型计算机系统为核心的微机化；在此基础上，构成了野外高灵敏度Ｘ射线荧光测量系统。该系统可测定多种元素，较轻和中等原子序数元素的检出限达到百万分之几至百万分之十几，比现行轻便型Ｘ射线荧光仪改善了一个量级以上。基体效应校正和数据处理功能大为增强，携带和运输符合环保要求。In view of the defects of low sensitivity, poor detection limits, small number of determined elements and poor ability of matrix effect correction of the current field portable X ray fluorescence (XRF) analyzer, research work on key units of excitation source, detector, measurement circuit and microcomputerization was carried out. A miniature, low power X ray tube excitation source was developed; A low dissipative, 1024 channel analyzer, fit for high resolution detectors, was prepared; Microcomputerization based on a notebook computer was realized . On the basis of the above, a field, highly sensitive XRF system was constituted. With this system, multielements can be determined with the detection limits of n ×10 -6 ～10×10 -6 for the elements with medium and relatively low atomic number, one order of magnitude or more lower than those of the current portable XRF analyzers. The capabilities for matrix effect correction and data processing were enhanced. This system abandoned radionuclide sources, making the use and carrying of the system safe and convinient.

关 键 词：X射线 荧光测量系统 高灵敏度 放射性测量仪 

分 类 号：P631.63[天文地球—地质矿产勘探]