Influence of polychromaticity on particle structure determination in small-angle X-ray scattering

	Influence of polychromaticity on particle structure determination in small-angle X-ray scattering
	Wang WJ(王文佳); Chang GC(常广才); Zhang LH(张连辉); Dong YH(董宇辉); 刘鹏(多); Wang, WJ; Shtykova, EV; Volkov, VV; Chang, GC; Zhang, LH
刊名	JOURNAL OF APPLIED CRYSTALLOGRAPHY
	2015
卷号	48 页码:1935-1942
关键词	small-angle X-ray scattering polychromatic beams smear effect structural analysis
通讯作者	董宇辉 ; 刘鹏（多）
英文摘要	Pink beams are now widely used for small-angle X-ray scattering (SAXS) data collection owing to their high intensity. However, the wavelength spread of a pink beam is a factor of 100 higher than that of a monochromatic beam, thus causing the experimental data to be smeared. To reveal the influence of polychromaticity on shape reconstruction, four geometric bodies (sphere, cube, helix and long cylinder) were used for SAXS data analysis. The results reveal that the influence of polychromaticity on the process of shape reconstruction is significantly more dependent on the geometry of the body than on its size. Scattering objects with smoothed scattering curves can tolerate a higher wavelength spread than those with tortuous curves. It is further demonstrated that the structural parameters calculated from the smeared data sets have little deviation from the ideal ones, which indicates the possibility of using a light source with a greater wavelength spread than a conventional pink beam for special time-resolved SAXS experiments. Finally, it is concluded that SAXS data collected in pink-beam mode can be used directly for structural calculations and model reconstructions without a desmearing procedure.
学科主题	Chemistry; Crystallography
类目[WOS]	Chemistry, Multidisciplinary ; Crystallography
收录类别	SCI ; EI ; CA
WOS记录号	WOS:000365774800041
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228845]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Wang WJ,Chang GC,Zhang LH,et al. Influence of polychromaticity on particle structure determination in small-angle X-ray scattering[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY,2015,48:1935-1942.
APA	王文佳.,常广才.,张连辉.,董宇辉.,刘鹏.,...&Liu, P.(2015).Influence of polychromaticity on particle structure determination in small-angle X-ray scattering.JOURNAL OF APPLIED CRYSTALLOGRAPHY,48,1935-1942.
MLA	王文佳,et al."Influence of polychromaticity on particle structure determination in small-angle X-ray scattering".JOURNAL OF APPLIED CRYSTALLOGRAPHY 48(2015):1935-1942.