Nuclear magnetic field

The mixed derivative of an external and an internal magnetic field (nuclear spin) is the NMR shielding eonstant, [Pg.239]

The nuclear magnetic resonance phenomenon occurs for certain nuclei that possess a magnetic moment g. When placed in a magnetic field, nuclear moments will align themselves in a discrete number of orientations. The number of orientations is determined by the nuclear spin I, which is a fundamental property of certain nuclei and has values of 0, 1/2, 1, 3/2, etc. The number of allowed orientations of a nucleus is given by 21 - - 1. The most commonly observed nuclei in... 

Here the first line represents the influence of the magnetic field only, the second and third line the magnetic field-nuclear magnetic moments interaction, the fourth line the magnetic field-electronic magnetic moment interaction and the last one the electronic-nuclear magnetic moments interaction (it is a new term). 

For the most complex perturbation expansion including the magnetic field, nuclear magnetic moments and the electronic magnetic moment... 

NMR spectroscopy Determination of molecular structure from liow nuclei absorb radiation in a magnetic field (nuclear magnetic resonance). 

R 781 I. S. Dzhafarov, S. F. Khafizov and P. E. Syngaevsky, Permeability Appraisal Models Based on Strong Magnetic Field Nuclear Magnetic Resonance Logs , Neftyanoe Khozyaistvo, 2002,12, 32... 

Spin of nuclei in a magnetic field Nuclear magnetic resonance (NMR) spectroscopy 0.5-10 m... 

Magnetic field Nuclear spin Chemical shift... 

FIGURE 16.16 In the presence of magnetic fields, nuclear spin states split into nondegenerate energy levels. NMR spectroscopy probes the transitions between these nuclear energy states. 

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