Commonly used radiation sources (radionuclides) for brachytherapy
| Radionuclide | Type | Half-life | Energy |
|---|---|---|---|
| Caesium-137 (137Cs) | γ-ray | 30.17 years | 0.662 MeV |
| Cobalt-60 (60Co) | γ-rays | 5.26 years | 1.17, 1.33 MeV |
| Iridium-192 (192Ir) | γ-ray | 74.0 days | 0.38 MeV (mean) |
| Iodine-125 (125I) | X-rays | 59.6 days | 27.4, 31.4 and 35.5 keV |
| Palladium-103 (103Pd) | X-ray | 17.0 days | 21 keV (mean) |
| Ruthenium-106 (106Ru) | β-particles | 1.02 years | 3.54 MeV |
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