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A unit of the magnetic dipole moment of a molecular, atomic, or subatomic particle. ◇ The Bohr magneton is defined as the magnetic dipole moment of the electron due to its inherent spin angular momentum, and is equal to 9.2741 × 10-24 joules per tesla. Also called Landé factor. ◇ The nuclear magneton is defined using the electric charge and rest mass of the proton, and is equal to 5.0508 × 10-27 joules per tesla.
unit of magnetic moment (the product of a magnet's pole strength and the distance between its poles) used in the study of subatomic particles. The Bohr magneton, named for the 20th-century Danish physicist Niels Bohr, is equal to about 9.273 10-21 erg per gauss per particle. The nuclear magneton, calculated using the mass of the proton (rather than that of the electron, used to calculate the Bohr magneton) equals 1/1,836 Bohr magneton. See magnetic dipole.