gyromagnetic ratio


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gy·ro·mag·net·ic ra·ti·o

in nuclear magnetic resonance, the ratio of the magnetic dipole moment of the nucleus to the nuclear spin angular momentum; the gyromagnetic ratio is a unique value for each type of nucleus.
Synonym(s): magnetogyric ratio

gyromagnetic ratio (γ)

a value characteristic of any magnetic nucleus that determines the Larmor frequency, fL, in a given magnetic field B (fL= γB).

gyromagnetic ratio

An MRI term for a constant for a given nucleus which links the nuclear MR frequency to the strength of the external magnetic field, and corresponds to the ratio of the magnetic moment (field strength) to the angular momentum (frequency) of a particle. The value of the gyromagnetic ratio for hydrogen (1H) is 4,258 Hz/G or 42.58 MHz/Tesla.

gy·ro·mag·net·ic ra·ti·o

(ji'rō-mag-net'ik rā'shē-ō)
The precessional frequency of an element at 1.0 tesla.
References in periodicals archive ?
ii) the efficiency of the gradient which, in practice, is lowered by a factor of 4 (with respect to proton measurements), because it acts through the expression [Gamma]g, where g is the gradient amplitude (independent of the observed nuclei in the case of static field gradients) and [Gamma] the gyromagnetic ratio.
H = DC magnetic field vector M = magnetization vector t = time variable [Gamma] = gyromagnetic ratio [Alpha] = damping magnitude coefficient
91 is the gyromagnetic ratio of the neutron, e is the charge of the electron, and [m.
The permeability tensor is dependent upon the material's saturation magnetization and its gyromagnetic ratio, which are derived by considering the origin of the ferrite's magnetic moments.
The same technique as used to measure a solenoid's field in the proton gyromagnetic ratio experiment [13] is used to measure a mutual inductance at dc that is independent of frequency.
p], the gyromagnetic ratio of the proton, which would relate the measurement of magnetic field strength to the nuclear magnetic resonance (NMR) frequency of the proton.