HL of Iodine -125 (Brain and Prostate Ca) - 60 days, HL of Palladium- 103 (prostate Ca) - 17 days, HL of cesium -137 (uterus and cervix Ca) - 30 years, HL of Strontium -90 (eye Ca) - 28 years, HL Yttrium -90 (liver cancer + lymphoma) - 2.67 days, HL Iridium - 192 - 73.8 days (used for HDR - supplied in nylon ribbon), HL Gold -198 - 2.7 days, HL of Radium - 1622 years, HL of Cobalt -60 - 5.26 years,

Radioactivity/Half - Life

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