NIST Atomic Spectroscopic Database
Ground States and Ionization Energies: Tm
Thulium, Z = 69
- Tm I
- Tm I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f136s2 2Fº7/2
- Ionization energy 49879.8 ± .5 cm-1
- References on
Energy Levels
- Tm II
- Er I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f136s 2Fº7/2
- Ionization energy 97200 ± 600 cm-1
- References on
Energy Levels
- Tm III
- Ho I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f13 2Fº7/2
- Ionization energy 191000 ± 800 cm-1
- References on
Energy Levels
- Tm IV
- Dy I isoelectronic sequence
- Ground state [Kr] 4d105s25p64f12 3H6
- Ionization energy 344000 ± 3000 cm-1
- References on
Energy Levels
