Radioactivity 20 : The spontaneous emission of radiation, generally alpha or beta particles, often accompanied by gamma rays, from the nucleus of an unstable isotope
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Madison County North Carolina Government, Madison County Emergency Operations Plan Glossary (Section 3: Nuclear Terms), NC, USA 2009. http://www.madisoncountync.org/eop/Madison_EOP_PDF /Glossary.pdf, (CBRNEmr - Amer) {875}
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