%0 Journal Article
%T Diffraction Efficiency of X-ray Grating with Polychromatic Source<br>复色光源X射线光栅衍射效率
%A LIU Xin
%A GUO Jin-chuan
%A GUI Jian-bao
%A NIU Han-ben
%A <br>刘鑫
%A 郭金川
%A 桂建保
%A 牛憨笨
%J 光子学报
%D 2008
%I 
%X The diffraction performance of X-ray grating based on the Fresnel diffraction theory is presented in the case of polychromatic source.Efficiency of grating influenced by various factors,which consist of material,height of groove of grating,spectrum of source and aspect ratio,is discussed.And how to choose the parameters is presented.It takes into account diffraction intensity of zero order and first order.Compared with high Z elements,material consist of low Z elements is applicable to x-ray grating,such as Be,Al,Si and C5H8O2(PMMA) with bandwidth of 18~30 keV.The height of groove of the grating should be according to the spectrum of source.
%K X-ray grating
%K Diffraction efficiency
%K Aspect ratio
%K Differential phase-contrast imaging<br>X射线光栅
%K 衍射效率
%K 占空比
%K 微分相衬成像
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=206B158B2113B3BB02A115BE967DE061&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=5D311CA918CA9A03&sid=3DE6111EA92D7986&eid=EDB832473B2BA2DF&journal_id=1004-4213&journal_name=光子学报&referenced_num=1&reference_num=15