?Uncharged elementary particle with a mass of 1.67492716 ·10-27 kg and thus a slightly greater mass than that of the proton. The free neutron is instable and decays with a half-life of 11.5 minutes. Neutron activation analysis ?activation analysis.
Winfried Koelzer, Nuclear Terms, Karlsruher Institut for Technologie KIT (Ed.), ISBN German print version 2001: 3-923704-32-1, Translation by Informationskreis KernEnergie (Berlin), Karlsruhe, Germany 2013. https://www.euronuclear.org/info/encyclopedia/pdf/ Nuclear_Glossary-%202013-02-13.pdf, (Nucl Sfty - Amer) {1011}