Cuadro de texto:   -  Atomic Mass: 21.0270876 ±  0.0000959 amu -  Excess Mass: 25231.909 ±  89.365 keV -  Binding Energy: 138789.396 ±  89.365 keV -  Beta Decay Energy: B- 17170.173 ±  90.171 keV -  Spin: (1/2-) -  Half life: 87 ms -  Mode of decay: Beta to O-21 º  Decay energy: 17.170 MeV -  Mode of decay: Beta + Neutron to O-20 º  Branch ratio: 80.00 % º  Decay energy: 13.360 MeV  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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