Cuadro de texto:   -  Atomic Mass: 209.0095687 ± 0.0002605 amu -  Excess Mass: 8913.219 ± 242.692 keV -  Binding Energy: 1608363.795 ± 242.693 keV -  Spin: (9/2-) -  Half life: 0.10 s -  Mode of decay: Alpha to Fr-205 º Branch ratio: ~99.00 % º  Decay energy: 7.730 MeV -  Mode of decay: EC to Ra-209 º  Branch ratio: ~1.00 % º  Decay energy: 7.110 MeV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

              

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