### Atomic Data for Yttrium (Y)

### Atomic Number = 39

### Atomic Weight = 88.90585

### Reference = E95

    Isotope   Mass       Abundance Spin Mag Moment

    89Y       88.905849  100%      1/2  -0.1373

    Y I  Ground State 1s22s22p63s23p63d104s24p64d5s2  2D3/2
         Ionization energy  50145.6 cm-1 (6.2173 eV)   Ref. GRTE73,JS00

    Y II Ground State 1s22s22p63s23p63d104s24p65s2  1S0
         Ionization energy  98590 cm-1 (12.224 eV)   Ref. NJK91