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Cuadro de texto:   -  Atomic Mass: 239.0521565 ± 0.0000021 amu -  Excess Mass: 48583.478 ± 1.971 keV -  Binding Energy: 1806921.454 ± 1.998 keV -  Beta Decay Energy: B- -802.912 ± 2.011 keV -  Spin: 1/2+ -  Half life: 24110 years -  Mode of decay: Alpha to U-235 º  Decay energy: 5.245 MeV -  Mode of decay: SF º  Branch ratio: 3E-10 % -  Possible parent nuclides: Beta from Np-239 Electron capture from Am-239 Alpha from Cm-243