Further structural data can be elucidated by observing " spin-spin coupling ", a process by which the precession frequency of a nucleus can be influenced by the magnetization transfer from nearby chemically bound nuclei.
12.
The absence of chemical shifts causes features such as spin-spin multiplets ( that are separated by high fields ) to be superimposed in EFNMR . Instead, EFNMR spectra are dominated by spin-spin coupling ( J-coupling ) effects.
13.
Dirac pointed out that the critical features of the exchange interaction could be obtained in an elementary way by neglecting the first two terms on the right-hand side of Eq . ( 9 ), thereby considering the two electrons as simply having their spins coupled by a potential of the form:
14.
However, this assignment does not explain some of the known features and behaviours of this molecule, in particular the absence of spin-spin coupling of the two axial protons associated with their geminal hydroxyl groups and the failure to react with iodate in a cleavage reaction which the presence of such a viscinal 1, 2-diol would require.
15.
This increased backspin is different from both the iron and the wood of the same number, and creates a flight path similar to a higher-loft iron but at a lower angle of launch; the backspinning ball will lift itself in the air along its flight line, " stall " when the lift generated by the spin coupled with the ball's momentum can no longer keep it in the air, and drop relatively sharply onto the turf.
16.
The RKKY interaction was originally proposed by M . A . Ruderman and Charles Kittel of the University of California, Berkeley, as a means of explaining unusually broad hyperfine interaction, and this conduction electron then interacts with another nuclear spin, thus creating a correlation energy between the two nuclear spins . ( Alternatively, instead of nuclear spins coupling to conduction spins through the hyperfine interaction, another scenario is for inner electron spins to couple to conduction spins through the exchange interaction . ) The theory is based on Bloch wavefunctions and is therefore only applicable to crystalline systems.
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