In atomic physics, the Bohr magneton (symbol $\backslash mu\_B$) is named after the physicist Niels Bohr. It is a physical constant of magnetic moment, defined in S.I. units by:

$\backslash mu\_B\; =$

$\backslash mu\_B\; =$

$e$ is the elementary charge,

$\backslash hbar$ is the reduced Planck's constant,

$m\_e$ is the electron rest mass

$c$ is the speed of light.

In the SI system of units its value is:

$\backslash mu\_B$ = 9.274 009 49(80) × 10^-24 J·T^-1

and in the centimeter-gram-second system of units:

$\backslash mu\_B$ = 9.274 009 49(80) × 10^-21 erg·G^-1

The Bohr magneton is the natural unit for expressing the electron magnetic dipole moment.

See also

• Nuclear magneton
• Physical constant

Atomic physics | Physical constants | Magnetism

Bohrsches Magneton | Magnetón de Bohr | Magnetone di Bohr | Magneton Bohra | Магнетон Бора | 波耳磁子