hyperfine coupling

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• Hyperfine structure — In atomic physics, hyperfine coupling is the weak magnetic interaction between electrons and nuclei. Hyperfine coupling causes the hyperfine splitting of atomic or molecular energy levels. The totality of energy levels spawned by hyperfine… …   Wikipedia

• hyperfine structure — /huy peuhr fuyn , huy /, Physics. the splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom. Cf. fine structure. [1925 30; HYPER + FINE1] * * * ▪ physics       in spectroscopy, the splitting of… …   Universalium

• hyperfine structure — /ˌhaɪpəfaɪn ˈstrʌktʃə/ (say .huypuhfuyn strukchuh) noun 1. the occurrence of very closely spaced energy levels in an atom, due to coupling between the momentum of the orbital electrons and the spin of the nucleus. 2. the splitting of certain… …  

• Angular momentum coupling — Coupling in science Classical coupling Rotational–vibrational coupling Quantum coupling Quantum mechanical coupling Rovibrational coupling Vibronic coupling Rovibronic coupling Angular momentum coupling …   Wikipedia

• Electron paramagnetic resonance — (EPR) or electron spin resonance (ESR) spectroscopy is a technique for studying chemical species that have one or more unpaired electrons, such as organic and inorganic free radicals or inorganic complexes possessing a transition metal ion. The… …   Wikipedia

• magnetic resonance — Absorption or emission of electromagnetic radiation by electrons or atomic nuclei in response to certain magnetic fields. The principles of magnetic resonance are used to study the atomic and nuclear properties of matter; two common laboratory… …   Universalium

• Fermi contact interaction — Not to be confused with Fermi s interaction . The Fermi contact interaction is the magnetic interaction between an electron and an atomic nucleus when the electron is inside that nucleus. It is of magnitude and where U is the energy of the… …   Wikipedia

• Xenon — (PronEng|ˈzɛnɒn [Xenon, entry in the Oxford English Dictionary, prepared by J. A. Simpson and E. S. C. Weiner, vol. 20, second edition, Oxford: Clarendon Press, 1989. ISBN 0 19 861232 X (vol. 20), ISBN 0 19 861186 2 (set.)] or IPAlink en|ˈziːnɒn… …   Wikipedia

• Dynamic nuclear polarisation — Dynamic nuclear polarization (DNP)[1] [2] results from transferring spin polarization from electrons to nuclei, thereby aligning the nuclear spins to the extent that electron spins are aligned. Note that the alignment of electron spins at a given …   Wikipedia

• Spin trapping — is an analytical technique employed in the detection and identification of short lived free radicals. Spin trapping involves the addition of radical to a nitrone spin trap resulting in the formation of a spin adduct, a nitroxide based persistent… …   Wikipedia

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium