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date: 26 September 2021

beta decay 

A Dictionary of Astronomy
Ian RidpathIan Ridpath

Radioactive decay in which an atomic nucleus spontaneously decays into a daughter nucleus, releasing two subatomic particles. Either a neutron turns into a proton, releasing an electron plus an antineutrino; or a proton turns into a neutron, releasing a positron plus a neutrino. The resultant nucleus has the same mass number as the original nucleus (i.e. the same total number of protons and neutrons), but the atomic number differs by one. The electrons or positrons emitted are known as ... ...

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