Source: wikibot/delayed-neutron
= Delayed neutron
{wiki=Delayed_neutron}
Delayed neutrons are a small fraction of neutrons that are emitted from certain radioactive isotopes as a result of beta decay, rather than being emitted immediately during the fission process of a nuclear reactor. When a heavy nucleus undergoes fission, it typically releases a number of prompt neutrons right away (usually within 10^-14 seconds).