Endpoint energy

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In the radioactive decay of nuclides emitting beta particles, all beta particle energies are possible from zero to a maximum called the endpoint energy. The endpoint energy in beta decay corresponds to the mass difference between the parent and daughter nuclides. The average energy of the beta particles is less than one half of the endpoint energy. The remaining energy is carried away by the anti-neutrino (in the case of beta- decay) or the neutrino (in the case of beta+ decay).


Beta decay

Beta energy spectrum

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