Cuadro de texto:   -  Atomic Mass: 221.0139078 ± 0.0000076 amu -  Excess Mass: 12954.995 ± 7.039 keV -  Binding Energy: 1701960.247 ± 7.046 keV -  Beta Decay Energy: B- -1553.717 ± 50.813 keV -  Spin: 5/2+ -  Half life: 28 s -  Mode of decay: Alpha to Rn-217                                 º  Decay energy: 6.886 MeV -  Mode of decay: 14C                                 º  Branch ratio: 1E-12 %                                 º  Decay energy: 6.886 MeV -  Possible parent nuclides:    Alpha from Th-225    

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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