### Atomic Data for Thulium (Tm)

### Atomic Number = 69

### Atomic Weight = 168.93421

### Reference = E95

    Isotope    Mass       Abundance Spin Mag Moment

    169Tm      168.93421  100%      1/2  -0.2316

    Tm I  Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f136s2  2F°7/2
          Ionization energy  49879.8 cm-1 (6.18431 eV)   Ref. C71

    Tm II Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f13(2F°7/2)6s  (7/2,1/2)°4
          Ionization energy  97200 cm-1 (12.05 eV)   Ref. SR65