NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Carbon (C)

Atomic Number = 6

Atomic Weight = 12.011

Reference E95

  Isotope   Mass   Abundance   Spin   Mag Moment 

C I  Ground State 1s22s22p2 3P0
       Ionization energy  90820.45 cm-1 (11.26030 eV)   Ref. J66

C II Ground State 1s22s22p 21/2
       Ionization energy  196664.7 cm-1 (24.3833 eV)   Ref. MG93