prompt neutron

noun

A neutron produced immediately by the fission of an atomic nucleus, instead of being emitted by decaying fission products seconds to minutes later; over 99% of all fission neutrons are prompt neutrons (the exact portion depends on the nuclide undergoing fission).

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Meanings

nounprompt neutron (plural prompt neutrons)

plural prompt neutrons

  1. nuclear physicsA neutron produced immediately by the fission of an atomic nucleus, instead of being emitted by decaying fission products seconds to minutes later; over 99% of all fission neutrons are prompt neutrons (the exact portion depends on the nuclide undergoing fission).
Cite this entry
APA

prompt neutron. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/prompt%20neutron

MLA

“prompt neutron.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/prompt%20neutron. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “prompt neutron,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/prompt%20neutron.

Source: prompt neutron on Wiktionary, CC BY-SA 4.0.