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Article #5Re: x-rays: explain diffraction vs coherent scatter
From: L. D. Marks
Date: Thu, 31 Aug 2000 18:58
Date: Thu, 31 Aug 2000 18:58
18 lines
2174 bytes
2174 bytes
While it is true that there is no difference between Rayleigh and Bragg scattering in many respects, this is only part of the answer. Bragg diffraction as used for x-ray diffraction refers primarily to the case when the wave scattered from different regions add coherently to give a large nett intensity. Rayleigh scattering is, I think, more for the case when the scattering from different regions adds incoherently. A loose analogy would be to compare Rayleigh scattering to what one has from an amorphous material, versus Bragg diffraction from a crystal. -- Laurence Marks Department of Materials Science and Engineering Northwestern University fax: (847) 491-7820 mailto:L-marks@northwestern.edu http://www.numis.nwu.edu
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fcf0b,cf3d615b81fdf937 X-Google-Attributes: gidfcf0b,public X-Google-Thread: fd8e4,cf3d615b81fdf937 X-Google-Attributes: gidfd8e4,public X-Google-Thread: 1144f8,cf3d615b81fdf937 X-Google-Attributes: gid1144f8,public X-Google-Thread: f804b,cf3d615b81fdf937 X-Google-Attributes: gidf804b,public X-Google-ArrivalTime: 2000-08-31 11:58:42 PST Path: arc1-ca.pugleaf.net!supernews.google.com!sn-xit-02!sn-east!supernews.com!news-feed.riddles.org.uk!newsfeed.direct.ca!look.ca!upp1.onvoy!msc1.onvoy!onvoy.com!Urvile.MSUS.EDU!not-for-mail From: "L. D. Marks" <L-marks@nwu.edu> Newsgroups: sci.physics.research,bionet.xtallography,sci.techniques.xtallography,sci.med.radiology Subject: Re: x-rays: explain diffraction vs coherent scatter Date: 31 Aug 2000 18:58:11 GMT Organization: Northwestern University, Evanston, IL. USA Lines: 19 Approved: spr@rosencrantz.stcloudstate.edu (sci.physics.research) Message-ID: <39AE8396.15629746@nwu.edu> References: <8nv46o$plq$1@nnrp1.deja.com> Reply-To: L-marks@nwu.edu NNTP-Posting-Host: rosencrantz.stcloudstate.edu Content-Type: text/plain; charset=us-ascii X-Trace: Urvile.MSUS.EDU 967748291 27682 199.17.31.144 (31 Aug 2000 18:58:11 GMT) X-Complaints-To: usenet@Urvile.MSUS.EDU NNTP-Posting-Date: 31 Aug 2000 18:58:11 GMT X-Accept-Language: en Originator: spr@rosencrantz.stcloudstate.edu (sci.physics.research co-moderator)