### Atomic Data for Praseodymium (Pr)

### Atomic Number = 59

### Atomic Weight = 140.90765

### Reference = E95

    Isotope    Mass        Abundance Spin Mag Moment

    141Pr      140.907647  100%      5/2  +4.3

    Pr I  Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f36s2  4I°9/2
          Ionization energy  44140 cm-1 (5.473 eV)   Ref. WSPC78

    Pr II Ground State (1s22s22p63s23p63d104s24p64d105s25p6)4f3(4I°9/2)6s  (9/2,1/2)°4
          Ionization energy  85100 cm-1 (10.55 eV)   Ref. SR65