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| {{Status|Canon}} | | {{Ratings}} |
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| | Nuclear energy, measured in millions of electron volts (MeV), is released by the [[fusion]] of two light nuclei, as when two heavy hydrogen nuclei, deuterons (ªH), combine in the reaction producing a helium-3 atom, a free neutron (¦n), and 3.2 MeV, or 5.1 × 10-13 J (1.2 × 10-13 cal). Nuclear energy is also released when the fission of a heavy nucleus such as ¯U is induced by the absorption of a neutron as in producing cesium-140, rubidium-93, three neutrons, and 200 MeV, or 3.2 × 10-11 J (7.7 × 10-12 cal). A nuclear fission reaction releases 10 million times as much energy as is released in a typical chemical reaction. |
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| '''Nuclear fission''' is a process where a large atomic nucleus (such as [[Wikipedia:Uranium|uranium]]) is split into smaller particles. A nuclear fission reaction releases millions of times the amount of energy as is released in a typical chemical reaction, making it an efficient source of energy.
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| For centuries, [[human]]ity has used nuclear fission for energy production through nuclear power, as well as [[nuclear weapon]]s. Both uses are possible because certain substances, called nuclear fuels, undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This enables a self-sustaining chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
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| While [[Nuclear fusion|fusion power]] and [[hydrogen]] fuel cells have been developed alongside traditional fission power, humanity continues to employ fission in auxiliary starship reactors and nuclear weaponry.<ref>'''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''', "[[The Impossible Life and the Possible Death of Preston J. Cole]]", ''page 445'' (2009 paperback); ''page 289'' (2010 Volume 1 paperback)</ref>
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| ==Sources==
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| {{Ref/Sources}}
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| [[Category:Physics]] | |
