Beta Decay: When Neutrons Turn Into Protons

Beta decay transforms a neutron into a proton, or vice versa.
In beta-minus decay, a neutron becomes a proton while emitting an electron and an antineutrino.
In beta-plus decay, a proton becomes a neutron while releasing a positron and a neutrino.
This process changes the element’s identity by shifting its proton count.
Beta decay is driven by the weak nuclear force, one of nature’s four fundamentals.
It helps unstable isotopes move toward a more stable balance of protons and neutrons.
Neutrinos, nearly massless particles, carry away energy during the decay.
Beta decay plays a vital role in the chain reactions that power stars.
It also shapes the natural radioactivity found in Earth’s rocks and atmosphere.
Understanding beta decay paved the way for nuclear medicine and neutrino physics.