A type of radioactive decay in which one or more neutrons are ejected from a nucleus. Neutron emission can occur in: - Neutron-rich/proton-deficient nuclides *(**spontaneous neutron emission**)* - The excited states of a nucleus, through the processes: - ***photoneutron emission***- ejection a neutron from a nucleus by [[Gamma Decay]] - ***beta-delayed neutron emission*** - ejection a neutron from a nucleus following a [[Beta Decay]] reaction