Nuclear magneton
| System of units | Value |
|---|---|
| SI | Template:Physconst |
| Gaussian | Template:Val<ref>Since the 2019 revision of the SI, the Gauss is no longer exactly corresponds to 10Template:Sup T.</ref> |
| eV | Template:Val<ref>Template:Cite web</ref> |
| MHz/T (per h) | Template:Val<ref>Template:Cite web</ref> |
The nuclear magneton (symbol Template:Math) is a physical constant of magnetic moment, defined in SI units by: <math display="block">\mu_\text{N} = {{e \hbar} \over {2 m_\text{p}}}</math> and in Gaussian CGS units by: <math display="block">\mu_\text{N} = {{e \hbar} \over{2 m_\text{p} c}}</math> where:
- Template:Math is the elementary charge,
- Template:Math is the reduced Planck constant,
- Template:Math is the proton rest mass, and
- Template:Math 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 Template:Math:
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 Template:Math by a factor equal to the proton-to-electron mass ratio, about 1836.
See also
[edit]References
[edit]External links
[edit]- Template:Cite web.
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