摘要
利用MC法,模拟不同电子入射方向的微型X射线管出射X射线谱,从而得出最佳入射角。模拟了50 keV能量的点源电子束、2μm银靶、250μm铍窗的X射线管,得到电子的最佳入射角为15°。结果表明:与传统微型透射式X射线管结构相比,调节电子入射角后的原能谱中低能X射线本底对待测元素的特征X射线的干扰减少了,并且电子束轰击靶材产生连续的韧致辐射和特征X射线的相对强度也提高了,有利于EDXRF分析的精度与准确性。
By using Mont Carlo method the simulation of emitting X-ray spectroscopy corresponding to different electron-injection direction in micro X-ray tube was performed and the optimal emitting angle was obtained. In the simulation there were electron beam with 50 keV from a point source, a silver target with 2μm of thickness and an X-ray tube with 250 μm of beryllium window. The results indicated that in comparison with the structure of conventional transmission- type X- ray micro X- ray tube, after adjusting electron direction a decrease in interference of low energy X-ray background to characteristic X-ray of measured elements was observed in original spectroscopy. In addition the relative strength of both successive bremsstrahlung and characteristic X- ray increased in the bombardment, which was beneficial to accuracy and precision in the EDXRF analysis.
作者
钟丁生
刘良柱
颜瑜成
于子博
周益民
吴杰波
ZHONG Ding-sheng;LIU Liang-zhu;YAN Yu-cheng;YU Zi-bo;ZHOU Yi-ming;WU Jie-bo(Chengdu University of Technology College of Engineering Technology, Leshan, Sichuan 614000, China;Southwest Institute of Physics, Chengdu 610225, China)
出处
《核电子学与探测技术》
北大核心
2017年第7期739-742,共4页
Nuclear Electronics & Detection Technology
基金
乐山市科技局项目(14GZD052)
成都理工大学工程技术学院青年院级基金(C122017038)资助
