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  14
      Ionization energy  44672 cm-1 (5.5387 eV)   Ref. WSPC78
Ce II Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f5d2  47/2
      Ionization energy  87500 cm-1 (10.85 eV)   Ref. SR65