Nuclear magneton

The nuclear magneton (symbol ${\displaystyle \mu _{\mathrm {N} }\!}$), is a physical constant of magnetic moment, defined by:

${\displaystyle \mu _{\mathrm {N} }={{e\hbar } \over {2m_{\mathrm {p} }}}}$

where:

${\displaystyle e\!}$ is the elementary charge,

${\displaystyle \hbar }$ is the reduced Planck's constant,

${\displaystyle m_{\mathrm {p} }\!}$ is the proton rest mass

In the SI system of units its value is approximately:

${\displaystyle \mu _{\mathrm {N} }\!}$ = 5.050 783 24(13) × 10^-27 J·T^-1

The nuclear magneton is the natural unit for expressing magnetic dipole moments of heavy particles such as nucleons and atomic nuclei. On the countrary, the dipole moment of the electron, which is much higher as a consequence of much higher charge-to-mass ratio, is usually expressed in corresponding units of the Bohr magneton.

• Proton magnetic moment
• Neutron magnetic moment
• Bohr magneton

• nuclear magneton, value from CODATA