Iridium-192 : A gamma-ray emitting radioisotope used for gamma radiography. The half-life is 73-83 days. (Chemical/Biological/Radiological Incident Handbook, Central Intelligence Agency)
U.S. Department of Health and Human Services, Office of the Assisstant Secretary for Preparedness and Response, National Library of Medison, Radiation Emergency Medical Management (REMM), Dictionary of Radiation Terms, Washington, DC, USA 2014. http://www.remm.nlm.gov/dictionary.htm, (Dzstr/ Rad Emr - Amer) {822}
Central Intelligence Agency, Chemical/Biological/Radiological Incident Handbook (Sections G., H. and I. Glossaries of Chemical, Biological and Radiological Terms), Office of Public Affairs Washington, D.C., USA 1998. https://www.cia.gov/library/reports/general-report s-1/cbr_handbook/cbrbook.htm#8, (CBRN - Amer) {787}
Central Intelligence Agency CIA, Chemical/Biological/Radiological Incident (CBR) Handbook, Section H. Glossary of Biological Terms, The Office of Public Affairs (OPA), Central Intelligence Agency (CIA) Washington, DC, USA 1998. https://www.fema.gov/vii-glossary-terms, (D/CBRN - Amer) {814}
