Definition of "neutron-rich" [neutron-rich]

• Having a large ratio of neutrons to protons (adjective)

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• "In the nuclear fission process that occurs in these reactors, neutron-rich fission-fragment nuclei are produced, and these undergo radioactive decays in which the excess neutrons are converted to protons, emitting an electron and an anti-neutrino in the process."
• "Below that are heavy, neutron-rich elements that are also ionized, all arranged as the perfect crystal."
• "Shaughnessy called it "the most neutron-rich isotope we have found yet.""