NIST Atomic Spectroscopic Database
Ground States and Ionization Energies: Er
Erbium, Z = 68
- Er I
- Er I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f126s2 3H6
- Ionization energy 49262 ± 5 cm-1
- References on
Energy Levels
- Er II
- Ho I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f126s 3H6
- Ionization energy 96200 ± 600 cm-1
- References on
Energy Levels
- Er III
- Dy I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f12 3H6
- Ionization energy 183400 ± 800 cm-1
- References on
Energy Levels
- Er IV
- Tb I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f11 4Iº15/2
- Ionization energy 344000 ± 3000 cm-1
- References on
Energy Levels
