hyperfine structure


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hy·per·fine structure

 (hī′pər-fīn′)
n. Abbr. hfs
Any of the spectral lines formed from the splitting of broader spectral lines as a result of the interaction between the magnetic moments of electrons and atomic nuclei.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hyperfine structure

(ˈhaɪpəˌfaɪn)
n
(General Physics) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The resolved hyperfine structure in the Moossbauer spectra of Fe alloys with an Al content above 25 at.% is lacking.
Suryanarayana, "Effect of [sup.87]Sr hyperfine structure on the isotope selective excitation of 89Sr and [sup.90]Sr isotopes in collinear resonance ionization spectroscopy," Journal of Physics B: Atomic, Molecular and Optical Physics, vol.
Pauli first postulated that the atomic nucleus has a non-zero angular momentum (nuclear spin), (11) which would provide hyperfine structure due to a magnetic dipole interaction in addition to that due to nuclear field effects (electric quadrupole interaction).
Theory of the Stark Effect on the Atomic Hyperfine structure. by: Kyle Beloy.
The powder spectra are difficult to interpret since hyperfine structure is not observed.
The information about the hyperfine and super hyperfine structure was obtained, to explain the geometry of the complex as well as the site of the metalligand bonding or chemical environment around the metal ion.
The hyperfine structure in the EPR spectra of paramagnetic defects was surely caused either by [sup.6]Li or [sup.7]Li nuclei.
As in the case of thioformaldehyde, an Australian team using the Parkes 64 m radio telescope detected the methanimine [1.sub.10] - [1.sub.11] transition with [.sup.14]N hyperfine structure toward the galactic center cloud Sgr B2 (83).
The ESR spectroscopy has been most widely employed in the study of chemical, photochemical and electrochemical reactions which proceed via free radical mechanisms, because of the occurrence of hyperfine structure, which is the result of interaction between the unpaired electrons and magnetic nuclei in the paramagnetic species.
These estimated values included g-factors, hyperfine structure constants, and line widths that characterized the shape and intensity of each spectral component.
Two groups of [Mn.sup.2+] hyperfine structure lines are seen: a low-field group (0.13-0.17 T) and the central one (0.22-0.33 T).
Also, nuclear quadrupole hyperfine structure has shown a major reorganization of the electron distribution of both Xe and Au on complex formation.