A. Ferromagnetic Materials The Purpose of this Review The Gyromagnetic Equation [Pg.263]

These equations can be also expressed as functions of the strength H of the main magnetic field by using a relation of = yH, were y is the nuclear gyromagnetic ratio. Such expressions may be more useful for the usual broad-line NMR spectrometry in which the main field is slowly swept under a constant rotating subfield. [Pg.140]

Since the microwave frequency and gyromagnetic ratio are constant, changes in the applied stress will result in a shift in the resonant magnetic field. Indeed, the shift equation is [Pg.111]

In the case of proton-proton interactions, both nuclei S and /will have the same gyromagnetic ratios, and an implication of the Equation (4) then is that there is an upper limit of 50% on the nOe obtainable, whatever the distance between nuclei S and I. This means that the observation of an nOe between two nuclei does not necessarily mean they are spatially close to one another, and nOe results must therefore be interpreted with caution. Similarly, as will be seen later, the absence of nOe between two nuclei does not necessarily mean they are far apart. In the case of heteronuclear nOe, since the gyromagnetic ratio of proton (yv) is four times the gyromagnetic ratio of carbon y,), js/ jt can be four times greater than that obtainable in homonuclear nOe. [Pg.197]

If the primary isotopic effect is neglected, very accurate values may be obtained for the gyromagnetic constant ratio y("7Sn)/y(119Sn) [equation (10)1 from the ratio of the tin resonance frequencies, vTMs(U7Sn)/vTMs(U9Sn)- The ratios of resonance frequencies measured for pairs of tin isotopes with different accuracies by various authors are compared in Table XIV. [Pg.318]

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