magneton

n.
A unit of the magnetic moment of a molecular, atomic, or subatomic particle, especially:

1. The Bohr magneton, calculated using the mass and charge of the electron.
2. The nuclear magneton, calculated using the mass of the nucleon.

A unit for measuring magnetic moments of nuclear, atomic, or molecular magnets. The Bohr magneton μ_B has the value of the classical magnetic moment of an electron, given by

, where e and m_e are the charge and mass of the electron and h is the Planck constant. The nuclear magneton, μ_N is obtained by replacing the mass of the electron by the mass of the proton and is therefore given by

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sub-atomic physics For magnetic intensity, a unit of magnetic moment proportional to the ratio of charge to rest mass, being qualified as the Bohr magneton (symbol μ_B) for an electron, the nuclear magneton (symbol μ_N) for a proton. The value of each magneton is e·h/4π·m where m is the rest mass of the respective particle. The values,
[Mohr P. J., Taylor B. N. CODATA Recommended Values of the Fundamental Physical Constants: 2002 (to be published)]
[Mohr P. J., Taylor B. N. Rev. Mod. Phys. Vol. 72:351-495 (2000)]
[Mohr P. Phys. Today Vol. 53:7, 11-16 (2000)]
[For latest recommended values, see http://physics.nist.gov/cuu/Constants/index.html] each of relative standard uncertainty 8.6 × 10^-8, are

for the electron	μB	= e·h/4π·me	9.274 009 49(80) × 10-24 J·T-1
for the proton	μN	= e·h/4π·mp	5.050 783 43(43) × 10-27 J·T-1

These are used as units of magnetic dipole in the fields of electron-spin resonance and nuclear magnetic resonance spectroscopy, respectively.

Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a unit of magnetic moment of a molecular or atomic or subatomic particle

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