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scattering |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.03 sec. |
scatteringIn physics, the change in direction of motion of a particle because of a collision with another particle. The collision can occur between two charged particles; it need not involve direct physical contact. Experiments show that the trajectory of the scattered particle is a hyperbola and that, as the bombarding particle is aimed more closely toward the scattering centre, the angle of deflection decreases. The term scattering is also used for the diffusion of electromagnetic waves by the atmosphere, resulting, for example, in long-range radio reception on the ground. See also Rayleigh scattering. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Since 1912 chemists had known that a beam of x-rays directed towards a crystal is scattered when it strikes atoms, and the scattered radiation forms a pattern that can be recorded on film. To produce an image of what lies within a solid target, the new technique relies on complicated, computer-intensive manipulations of data in the form of fuzzy "shadowgraphs" produced by an array of detectors that record the scattered radiation emerging from the target. This technology provides significant performance advantages over film and fluorescent-screen-based systems, including higher detection efficiency, greater dynamic range, and superior rejection of scattered radiation. |
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