μ_N
nuclear magneton
The nuclear magneton is the analogous natural unit for nuclear magnetic moments, defined with the proton mass in place of the electron mass. Because the proton is about 1836 times heavier than the electron, the nuclear magneton is smaller than the Bohr magneton by the same ratio, at 5.0507837393e-27 joules per tesla. This value is measured rather than exact, following the current CODATA adjustment.
Watch out: Nuclear moments are not simple multiples of the nuclear magneton. The proton's moment is about 2.79 nuclear magnetons and the neutron's is about minus 1.91, both consequences of internal quark structure rather than a point-particle calculation.
| 1 μ_N | 5.0507837e-27 J/T |