The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Radioactivity -- Australia -- South Australia. : The occurrence of uranium (radio-active) ores and other rare metals and minerals in South Australia : with illustrations and maps / compiled by Lionel C. E. Gee ... under the authority of the Honourable John Verran, M.P., premier and minister of mines
1911
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Radioactivity -- Congresses : Radioactivity in man : whole body counting and effects of internal gamma ray-emitting radioisotopes ; a symposium held at the Vanderbilt University School of Medicine / edited by George R. Meneeley, M.D
Radioactivity -- Instruments -- Congresses : Radiation and particle detectors : proceedings of the International School of Physics "Enrico Fermi", Varenna on Lake Como, Villa Monastero, 20-25 July 2009 / edited by S. Bertolucci and U. Bottogli, directors of the course, and P. Oliva = Rivelatori per radiazione e particelle : rendiconti della Scuola internazionale di fisica "Enrico Fermi", Varenna sul Lago di Como, Villa Monastero, 20-25 Luglio 2008 / a cura di S. Bertolucci e U. Bottogli, diretori del corso, e di P. Oliva
Radioaktivt avfall. : Geological disposal of radioactive wastes and natural analogues : lessons from nature and archaeology / William Miller [and others]
2000
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Radioaktivt avfall -- förvaring. : Thermodynamic sorption modelling in support of radioactive waste disposal safety cases : NEA Sorption Project Phase III