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hyperfine structure

[hahy-per-fahyn, hahy-] /ˈhaɪ pərˈfaɪn, ˌhaɪ-/
noun, Physics.
the splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom.
Compare fine structure.
Origin of hyperfine structure
First recorded in 1925-30; hyper- + fine1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for hyperfine structure

hyperfine structure

the splitting of a spectral line of an atom or molecule into two or more closely spaced components as a result of interaction of the electrons with the magnetic moments of the nuclei Compare fine structure See also Zeeman effect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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