Brachytherapy - Radiation Sources

Radiation Sources

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-rays 73.8 days 0.38 MeV (mean)
Iodine-125 (125I) γ-rays 59.6 days 27.4, 31.4 and 35.5 keV
Palladium-103 (103Pd) γ-ray 17.0 days 21 keV (mean)
Ruthenium-106 (106Ru) β--particles 1.02 years 3.54 MeV

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