小角X光散射中干涉效应的判断与处理.pdfVIP

17 4 Vol17 No4 2006 1 CH INESE JOURNAL OF LIGHT SCATT ERING Jan 2006 :2005) X 1 1 1* 2 李志宏 , 吴忠华 , 吴自玉 , 吴 东 ( 1. , , 100039; 2. , , 030001) : X X , X , SAXS , , : X ; ; : O61372, O64811 : A Methods to Distinguish and Handle the Interference in SAXS 1 1 1* 2 LI Zhihong , WU Zhongh a , WU Ziy , WU Dong (1. Facility of Synchrotron Radiation, Institute of H igh Energy Physics, Chinese Academy of Sciences, Beij ing 100039, P. . Box 918, P R China; 2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese A cademy of Sciences, Taiyuan 030001, P. . Box 165, P R China) Abstract: Small angle X - ray scattering ( SAXS) originates from spatial fl ct ations of the electronic density w ithin a material. It is ideally s itable for investigating the geometric str c t re of inhomogeneo s material containing regions in w hich fl ct ation or variation in electron density extends over distances of abo t 0. 4nm to 200nm ( e. g. partic late or poro s materi als) . Most theories in SAXS are only applicable to sparse systems. For concentrated systems, there w ill appear interference to scattered intensities. This short paper briefly introd ces the methods to disting ish and handle the interference in SAXS literat res. Key words: Small angle X- ray scattering; concentrated systems; interference X 0. 01~ 100 , X [ 1] [ 2, 3] X X ( SAXS) X , , SAXS X ,