Nuclear decays which proceed via the weak interaction are beta (β) decays. These include all nuclear decays in which the Mass of a neutral atom of a nuclide - also called "atomic weight." The atomic weight of an element is the weighted average of each isotope. Click on Term to Read More (A) remains constant and the A number equivalent to the number of protons in the nucleus of an atom, commonly abbreviated as Z. Click on Term to Read More, Z, changes by one unit. Examples of β decay processes include:
The most elementary β decay process is free Charge-neutral hadron with a mass of 1.6748 x 10-27 kg, equivalent to 939.573 MeV, and an intrinsic angular momentum, or spin, of ½ (in units of h/2π). The neutron is a nucleon, one of the two basic constituents of all atomic nuclei (apart from 1H, which consists of a single Click on Term to Read More decay:
“Beta” originally referred to electrons, but β decays can involve electrons or positrons, and either electron neutrinos or anti-neutrinos.
Some or all content above used with permission from J. H. Wittke.