Nuclear magneton
| System of units | Value |
|---|---|
| SI | Template:Physconst |
| Gaussian | Script error: No such module "val".[1] |
| eV | Script error: No such module "val".[2] |
| MHz/T (per h) | Script error: No such module "val".[3] |
The nuclear magneton (symbol μNScript error: No such module "Check for unknown parameters".) is a physical constant of magnetic moment, defined in SI units by: and in Gaussian CGS units by: where:
- eScript error: No such module "Check for unknown parameters". is the elementary charge,
- ħScript error: No such module "Check for unknown parameters". is the reduced Planck constant,
- mpScript error: No such module "Check for unknown parameters". is the proton rest mass, and
- cScript error: No such module "Check for unknown parameters". is the speed of light
Its CODATA recommended value is: Template:Block indent In Gaussian CGS units, its value can be given in convenient units as Template:Block indent
The nuclear magneton is the natural unit for expressing magnetic dipole moments of heavy particles such as nucleons and atomic nuclei.
Due to neutrons and protons having internal structure and not being Dirac particles, their magnetic moments differ from μNScript error: No such module "Check for unknown parameters".:
- μp = Template:Physconst μN
- μn = Template:Physconst μN
The magnetic dipole moment of the electron, which is much larger as a consequence of much larger charge-to-mass ratio, is usually expressed in units of the Bohr magneton, which is calculated in the same fashion using the electron mass. The result is larger than μNScript error: No such module "Check for unknown parameters". by a factor equal to the proton-to-electron mass ratio, about 1836.
See also
References
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- ↑ Since the 2019 revision of the SI, the Gauss is no longer exactly corresponds to 10−4 T.
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Script error: No such module "Check for unknown parameters".
External links
- Script error: No such module "citation/CS1"..
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