Gyromagnetic/magnetogyric ratio

Gyromagnetic ratio A measure of how strong the response of a nucleus is. The higher the value, the more inherently sensitive will be the nucleus. XH has the highest value. Also known as Magnetogyric ratio. 

The angular momentum L has associated with it a magnetic moment /z. Both are vector quantities and they are proportional to each other. The proportionality factor y is a constant for each nuclide (i.e. each isotope of each element) and is called the gyromagnetic ratio, or sometimes the magnetogyric ratio. The detection sensitivity of a nuclide in the NMR experiment depends on y nuclides with a large value of y are said to be sensitive (i.e. easy to observe), while those with a small y are said to be insensitive. 

Here yN is the nuclear magnetogyric ratio, gN is the nuclear gyromagnetic ratio, and fa is the nuclear magneton ... 

We use the customary boldface type to denote vector quantities.) The constant of proportionality y is called the magnetogyric ratio and is different for different nuclei, because it reflects nuclear properties not accounted for by the simple picture of a spinning charged particle. (Sometimes y is termed the gyromagnetic ratio.) While p is a simple multiple of h, pc and hence y are not and must be determined experimentally for each nuclide (usually by an NMR method). Properties of most common nuclides that result from nuclear spin are given in Appendix A. 

Gyromagnetic ratio (y) - Ratio of the magnetic moment of a particle to its angular momentum. Also called magnetogyric ratio. 

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