... light nuclei, such as those of hydrogen, deuterium, or carbon. When expelled from the nucleus, the neutron is unstable and decays to form a proton, an electron, and a neutrino. Like the proton and the electron, the neutron possesses angular momentum, or spin. Neutrons act as small, individual magnets; this property enables beams of polarized neutrons to be created. The neutron has a negative magnetic moment of -1.913141 nuclear magnetons. Its half-life was fixed approximately at 10.61 minutes. Anti-Neutron The antiparticle of a neutron, known as an antineutron, has the same mass, spin, and beta-decay constant. These particles are sometimes the result of the collisions of antiprotons with protons, and they possess a magnetic moment equal and opposite to that of the neutron. According to current particle theory, the neutron and the antineutron-and other nuclear particles-are themselves composed of quarks. Proton A Proton is a nuclear particle having a positive charge identical in ...

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