Larmor frequency


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Related to Larmor frequency: NMR

Lar·mor fre·quen·cy

in magnetic resonance, the precessional frequency, n0, of magnetic nuclei in a plane perpendicular to the direction of the external magnetic field; v0 = γB0/2π, where B0 is the magnetic field strength and γ is the magnetogyric ratio.

Larmor frequency

Etymology: Joseph Larmor, Irish physicist, 1857-1942
the frequency of the precession of a charged particle when its motion comes under the influence of an applied magnetic field and a central force.

Larmor frequency

An MRI term for the frequency at which magnetic resonance in a nucleus can be excited and detected, which varies directly with the magnetic field strength, and is normally in the radio frequency (RF) range.

Larmor frequency

In magnetic resonance imaging (MRI), the frequency of the radio wave that will resonate with all the protons in the nucleus of a given element. The Larmor radio frequency induces the magnetic resonance used to create MRI images.
References in periodicals archive ?
The signature of a finite EDM is a change of the neutron Larmor frequency synchronous with the rever sal of the relative orientations of the magnetic and electric fields.
The detection of the modulated transmission by a photodetector allows a direct and real time measurement of the magnetic field in terms of the Larmor frequency.
The basic adiabaticity requirement is that the rate of a change of the field direction, has to be smaller compared to the Larmor frequency [omega] = [mu]B/h ([mu] is the magnetic moment of the neutron) then the projection of the spin on the field direction is approximately conserved; the projection of the neutron spin on the field direction is an adiabatic invariant.
In this method, the magnetization is tipped away from the quantization axis by applying a short pulse of radiation at the Larmor frequency (85 kHz for our typical operating field of 2.