NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Tungsten (W)

Atomic Number = 74

Atomic Weight = 183.85

Reference E95

Isotope    Mass       Abundance Spin Mag Moment
180W 79.946701 0.12% 0 182W 81.948202 26.3% 0 183W 82.950220 14.28% 1/2 +0.11778 184W 83.950928 30.7% 0 186W 85.954357 28.6% 0
W I  Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d46s2  5D0
     Ionization energy  63427.7 cm-1 (7.86403 eV)   Ref. CS96
W II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d46s  6D1/2
     Ionization energy  130000 cm-1 (16.1 eV)   Ref. MH84