Back مغنطون بور Arabic Bor maqnetonu Azerbaijani Магнетон Бора Byelorussian Магнетон на Бор Bulgarian Magnetó de Bohr Catalan Bohrův magneton Czech Bohr-magneton Danish Bohrsches Magneton German Magnetón de Bohr Spanish مگنتون بور Persian
| System of units | Value | Unit |
|---|---|---|
| SI[1] | 9.2740100783(28)×10−24 | J·T−1 |
| Gaussian[2] | 9.2740100783(28)×10−21 | erg·G−1 |
| eV/T[3] | 5.7883818060(17)×10−5 | eV·T−1 |
| atomic units | 1/2 | eħ/me |
In atomic physics, the Bohr magneton (symbol μB) is a physical constant and the natural unit for expressing the magnetic moment of an electron caused by its orbital or spin angular momentum.[4][5] In SI units, the Bohr magneton is defined as
and in the Gaussian CGS units as
where
- e is the elementary charge,
- ħ is the reduced Planck constant,
- me is the electron mass,
- c is the speed of light.
- ^ "2018 CODATA Value: Bohr magneton". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20.
- ^ O'Handley, Robert C. (2000). Modern magnetic materials: principles and applications. John Wiley & Sons. p. 83. ISBN 0-471-15566-7. (value updated to correspond to CODATA 2018)
- ^ "CODATA value: Bohr magneton in eV/T". The NIST Reference on Constants, Units, and Uncertainty. NIST. Retrieved 2022-08-28.
- ^ Schiff, L. I. (1968). Quantum Mechanics (3rd ed.). McGraw-Hill. p. 440. ISBN 9780070856431.
- ^ Shankar, R. (1980). Principles of Quantum Mechanics. Plenum Press. pp. 398–400. ISBN 0306403978.