中性子
Rutherford, E. (1919). “Collisions of alpha Particles with Light Atoms. IV. An Anomalous Effect in Nitrogen.”. F. R. S.. 6th series (The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science) 37 (581). http://web.lemoyne.edu/~giunta/rutherford.html. Rutherford, E. (June 3, 1920). “Bakerian Lecture: Nuclear Constitution of Atoms”. Proc. Roy. Soc. A 97 (686): 374-400. doi:10.1098/rspa.1920.0040. http://web.lemoyne.edu/~giunta/ruth1920.html.
Bothe, W.; Becker, H. (May 1930). “Künstliche Erregung von Kern-γ-Strahlen”. Zeitschrift für Physik A Hadrons and Nuclei (Springer-Verlag) 66 (5-6): 289-306. Bibcode: 1930ZPhy...66..289B. doi:10.1007/BF01390908. ISSN 0044-3328. OCLC 884174965. Bothe, W.; Becker, H. (May 1930). “Eine γ-Strahlung des Poloniums”. Zeitschrift für Physik A Hadrons and Nuclei (Springer-Verlag) 66 (5-6): 307-310. doi:10.1007/BF01390909. ISSN 0044-3328. OCLC 884174965. Becker, H.; Bothe, W. (July 1932). “Die in Bor und Beryllium erregten γ-Strahlen”. Zeitschrift für Physik (Springer-Verlag) 76 (7–8): 421-438. Bibcode: 1932ZPhy...76..421B. doi:10.1007/BF01336726. ISSN 0044-3328. OCLC 884174965.