Cuadro de texto:   -  Atomic Mass: 257.0955346 ± 0.0000035 amu -  Excess Mass: 88989.933 ± 3.298 keV -  Binding Energy: 1906322.335 ± 3.316 keV -  Beta Decay Energy: B- -1227.835 ± 30.793 keV -  Spin: (7/2-) -  Half life: 5.3 h -  Mode of decay: Electron capture to Fm-257 º  Branch ratio: 90.00 % º  Decay energy: 0.406 MeV -  Mode of decay: Alpha to Es-253 º  Branch ratio: 10.00 % º  Decay energy: 7.558 MeV -  Mode of decay: SF     Branch ratio: <4.00 %

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                       

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