• synonyms

slow neutron

noun Physics.
  1. a neutron with low kinetic energy, especially one slowed by the moderator in a nuclear reactor.
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Origin of slow neutron

First recorded in 1930–35
Also called thermal neutron.
Related formsslow-neu·tron, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for thermal neutron

slow neutron

  1. physics a neutron having a kinetic energy of less than 100 electronvolts
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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

thermal neutron in Science

thermal neutron

  1. See slow neutron.
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slow neutron

  1. A neutron that is in thermal equilibrium with the surrounding medium, especially one produced by fission in a nuclear reactor, and slowed by a moderator. The uranium 235 used in thermal nuclear reactors undergoes fission more readily when struck by slow neutrons than when struck by the fast neutrons released by fission. Also called thermal neutron Compare fast neutron.
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