When a high-energy photon is absorbed by an atomic nucleus, photodisintegration occurs. A neutron, proton, or alpha particle is released as the nucleus divides to form lighter elements.
Photodisintegration breaks up iron nuclei into helium nuclei and neutrons during a supernova's core collapse, undoing hundreds of thousands of years of nuclear fusion.
γ + 56Fe → 134He + 4n
Via photodisintegration, these helium nuclei are split into protons and neutrons, the fundamental basic components of elements.
γ + 4He → 2p+ + 2n
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