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Nuclear magneton
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Nuclear magneton : ウィキペディア英語版
Nuclear magneton
The nuclear magneton (symbol ''μ''N), is a physical constant of magnetic moment, defined in SI units by:
:\mu_\mathrm = }
and in Gaussian CGS units by:
:\mu_\mathrm =
where:
:''e'' is the elementary charge,
:''ħ'' is the reduced Planck constant,
:''m''p is the proton rest mass, and
:''c'' is the speed of light
In SI units, its value is approximately:
:''μ''N =
In Gaussian CGS units, its value can be given in convenient units as
:''μ''N =
The nuclear magneton is the natural unit for expressing magnetic dipole moments of heavy particles such as nucleons and atomic nuclei.
The magnetic dipole moment of the electron, which is much larger as a consequence of much larger charge-to-mass ratio, is usually expressed in units of the Bohr magneton.
==See also==

*Proton magnetic moment
*Neutron magnetic moment
*Electron magnetic moment
*Bohr magneton

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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