In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called positron emission.
https://en.wikipedia.org/wiki/Beta_decay
energy of the electrons increases to the point where it is energetically favorable for them to combine with protons to produce neutrons (via inverse beta decay
https://en.wikipedia.org/wiki/Degenerate_matter#Degenerate_gases
The momentum of the fermions in the fermion gas nevertheless generates pressure, termed "degeneracy pressure".
https://en.wikipedia.org/wiki/Degenerate_matter#Degenerate_gases
Electron capture is sometimes included as a type of beta decay,[3] because the basic nuclear process, mediated by the weak force, is the same. In electron capture, an inner atomic electron is captured by a proton in the nucleus, transforming it into a neutron, and an electron neutrino is released.
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