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fast neutron

American

[fast noo-trahn] / ˈfæst ˈnu trɑn /

noun

Physics. a neutron whose kinetic energy is high relative to surrounding neutrons, especially one that was produced by nuclear fission and has not been slowed down by a neutron moderator. Compare slow neutron.

fast neutron British

noun

physics
1. a neutron produced by nuclear fission that has lost little energy by collision; a neutron with a kinetic energy in excess of 0.1 MeV
2. a neutron with a kinetic energy in excess of 1.5 MeV, the fission threshold of uranium-238

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

fast neutron Scientific

A neutron that is not in thermal equilibrium with the surrounding medium, especially one produced by fission.
Compare slow neutron See also fast-breeder reactor

Example Sentences

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See Examples For:

fast neutron

Salehi did graduate work on fast neutron reactors at MIT.

From Washington Post ● Apr. 27, 2015

Power generated by the $40.5 million, 100,000-kw., "fast neutron breeder plant" will be distributed by Detroit Edison Co.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023