Half-Life 05 : The time any substance takes to decay by half of its original amount. See also: Biological Half-Life, Decay Constant, Effective Half-Life, Radioactive Half-Life.
Centers for Disease Control and Prevention (CDCP), Emergency Preparedness and Response, Glossary of Radiological Terms, Atlanta,GA, USA 2004. http://www.floridadisaster.org/Preparedness/Techno logicalHazards/Radiological/documents/ radiation%20emergency%20glossary%20(CDC).pdf, (DPrep - Amer) {1012}