257ES B- DECAY (7.7 D 2)        I(MIN)=0.0010%                                 

 Radiation        Energy       Intensity   (G-Rad 
    Type           (keV)          (%)      uCi-h) 
 ----------  --------------- ------------ --------

  G   3       25.7         3 100.      10   0.0547
  G   5       46.0         5  21.0     20   0.0206
  G   6       49.00           17.0     20   0.0177

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