摘要
使用外径为２００μｍ的复合导管组装的Ｘ光透镜，可将发散的Ｘ光束聚成直径为２５０μｍ的微束。测量了透镜的能谱特性，选择不同范围能谱特性的透镜可改善ＸＲＦ谱仪对个别元素的探测极限。与最佳几何但不带透镜的ＯＭＩＣＲＯＮ微束荧光谱仪比较表明，带透镜的ＸＲＦ谱仪对中重元素的分析灵敏度提高了近１０倍．
Recent work on the XRF system with X-ray lens is reported. A lens consisting of polycapillaries with an coter diameter of 200 μm can focus a divergent X-ray beam on a spot of 250μm diameter. The spectral characteristics of the lens has been measured,experimentally. The detection limit for some element can be improved by using a lens with specific spectral characteristic. A comparative study shows that the sensitivities for the middle-heavy elements using the XRF system with X-ray lens is 10 times higher than those using the OMICRON microfluorescence analyzer without X-ray lens.
出处
《核技术》
CAS
CSCD
北大核心
1996年第3期164-169,共6页
Nuclear Techniques
关键词
X射线荧光分析
X光透镜
XRF谱仪
X-rays, Microbeam X-ray fluorescence analysis, X-ray lens
