NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Cerium (Ce)

Atomic Number = 58

Atomic Weight = 140.115

Reference E95


Isotope    Mass        Abundance Spin Mag Moment

136Ce      135.907140  0.19%     0    
138Ce      137.905985  0.25%     0    
140Ce      139.905433  88.48%    0    
142Ce      141.909241  11.08%    0    

 
Ce I  Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f5d6s2  1G°4
      Ionization energy  44672 cm-1 (5.5387 eV)   Ref. WSPC78
 
Ce II Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f5d2  4H°7/2
      Ionization energy  87500 cm-1 (10.85 eV)   Ref. SR65