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fission
subjectfact 
fissionhas antonym fusion2001-09-27 09:29:44.0
has definition In nuclear physics, the splitting of the atomic nucleus of a heavy element, resulting in the emission of nuclear energy and possibly causing a chain reaction (with similar results) within a mass of the element.has source: Abbot, D. 1984 Astronomers, Peter Bedrick Books, New York, 2001-09-27 09:29:43.0
has definition Interaction in which nucleons previously united in an atomic nuclei are disjoined, releasing energy. Fission powers atomic bombs.has source: Ferris, T. 1988 Coming of Age in the Milky Way, Morrow, 2001-09-27 09:29:44.0
is a kind of nuclear process2001-09-27 09:29:43.0
physical processhas domain physics2001-09-27 09:29:38.0

Kinds of fission :