The nuclear magnetic moment is the magnetic moment of an atomic nucleus and arises from the spin of the protons and neutrons. It is mainly a magnetic dipole moment; the quadrupole moment does cause some small shifts in the hyperfine structure as well. A bar magnet. ... A semi-accurate depiction of the helium atom. ... // For alternative meanings see proton (disambiguation). ... This article or section does not cite its references or sources. ... This article is about the electromagnetic phenomenon. ... Quadrupole magnet(four-pole), focus particle beams in a particle accelerator. ... In atomic physics, hyperfine structure is a small perturbation in the energy levels (or spectra) of atoms or molecules due to the magnetic dipole-dipole interaction, arising from the interaction of the nuclear magnetic dipole with the magnetic field of the electron. ...

The nuclear magnetic moment varies from isotope to isotope of an element. It can only be zero if the numbers of protons and of neutrons are both even. Isotopes are any of the several different forms of an element each having different atomic mass. ... The periodic table of the chemical elements A chemical element, often called simply an element, is a substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical processes. ...

See also

• Nuclear magneton
• Magnetic moment
• Proton magnetic moment
• Neutron magnetic moment
• Electron magnetic dipole moment