NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Thorium (Th)

Atomic Number = 90

Atomic Weight = 232.0381

Reference E95

  Isotope   Mass   Abundance   Spin   Mag Moment 

Th I  Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p66d27s2 3F2
       Ionization energy  50867 cm-1 (6.3067 eV)   Ref. KDEE97

Th II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p66d27s 3/2
       Ionization energy  96000 cm-1 (11.9 eV)   Ref. MCS75