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Cuadro de texto:   -  Atomic Mass: 231.0382332 ± 0.0000543 amu -  Excess Mass: 35613.955 ± 50.592 keV -  Binding Energy: 1756102.748 ± 50.593 keV -  Beta Decay Energy: B- -2818.000 ± 113.000 keV -  Spin: (5/2) -  Half life: 48.8 min -  Mode of decay: Electron capture to U-231 º  Branch ratio: 98.00 % º  Decay energy: 1.840 MeV -  Mode of decay: Alpha to Pa-227 º  Branch ratio: 2.00 % º  Decay energy: 6.370 MeV