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. 1993 Jan-Feb;98(1):89–108. doi: 10.6028/jres.098.007

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 5 — Scattering function as a function of energy at a particular Q for diffusion confined to a particular region of space (e.g., rotational jump diffusion). Note the narrow component indicative of a process in which the atom has a finite probability of being at its initial position at infinite time.