Cuadro de texto:   -  Atomic Mass: 221.0142457 ± 0.0000081 amu -  Excess Mass: 13269.739 ± 7.530 keV -  Binding Energy: 1702427.855 ± 7.536 keV -  Beta Decay Energy: B- 314.745 ± 9.358 keV -  Spin: 5/2- -  Half life: 4.9 min -  Mode of decay: Alpha to At-217                                 º  Decay energy: 6.458 MeV -  Mode of decay: Beta to Ra-221                                 º  Branch ratio: <0.10 %                                 º  Decay energy: 0.312 MeV -  Mode of decay: 14C                                 º  Branch ratio: 9E-13 % -  Decay energy: 0.312 MeV -  Possible parent nuclides:     Beta from Rn-221     Alpha from Ac-225    

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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