In physics, the gyromagnetic ratio (also sometimes known as the magnetogyric ratio in other disciplines) of a particle or system is the ratio of its magnetic dipole moment to its angular momentum, and it is often denoted by the symbol γ, gamma. Its SI units are radian per second per tesla (rad s−1·T -1) or, equivalently, coulomb per kilogram (C·kg−1).
The term "gyromagnetic ratio" is sometimes used as a synonym for a different but closely related quantity, the g-factor. The g-factor, unlike the gyromagnetic ratio, is dimensionless. For more on the g-factor, see below, or see the article g-factor.
Read more about Gyromagnetic Ratio: Gyromagnetic Ratio and Larmor Precession, Gyromagnetic Ratio For A Classical Rotating Body, Gyromagnetic Ratio For An Isolated Electron, Gyromagnetic Factor As A Consequence of Relativity, Gyromagnetic Ratio For A Nucleus
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—John Jay Chapman (1862–1933)