NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Gadolinium (Gd)

Atomic Number = 64

Atomic Weight = 157.25

Reference E95


Isotope    Mass        Abundance Spin Mag Moment

152Gd      151.919786  0.20%     0    
154Gd      153.920861  2.18%     0    
155Gd      154.922618  14.80%    3/2  -0.27
156Gd      155.922118  20.47%    0    
157Gd      156.923956  15.65%    3/2  -0.36
158Gd      157.924099  24.84%    0    
160Gd      159.927049  21.86%    0    

 
Gd I  Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f75d6s2  9D°2
      Ionization energy  49601.45 cm-1 (6.14980 eV)   Ref. MOW98
 
Gd II Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f75d6s  10D°5/2
      Ionization energy  97500 cm-1 (12.09 eV)   Ref. SR73