NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Terbium (Tb)

Atomic Number = 65

Atomic Weight = 158.92534

Reference E95


Isotope    Mass        Abundance Spin Mag Moment

159Tb      158.925342  100%      3/2  +1.95

 
Tb I  Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f96s2  6H°15/2
      Ionization energy  47294 cm-1 (5.8638 eV)   Ref. WSPC78
 
Tb II Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f9(6H°15/2)6s  (15/2,1/2)°8
      Ionization energy  92900 cm-1 (11.52 eV)   Ref. SR65