
Iodine #
Orbitals and Energies #
Note – these are listed in BINDING ENERGY
I 3s ≈ 1072 eV
I 3p ≈ 875 eV
I 3d ≈ 620 eV
I 4s ≈ 186 eV
I 4d ≈ 50 eV
I 5s ≈ 14 eV
I 5p ≈ 3 eV
Common Overlaps for Cu 2p #
Cd 3p – Ra 4d – V 2s – Rh 3s – Re 4s – Gd LMM (Al Ka X-rays)–Eu LMM (Al Ka X-rays)
Theory and Background #
Iodine is analysed by the 3d orbitals, and displays no unusual behaviour.
Experimental Advice #
Avoid etching iodine containing materials in your chamber – this will likely cause persistent iodine contamination.
Data Analysis Guidance #
Iodine may feature a shake-up loss feature around 5 ish eV above the core line, not to be mistaken with another oxidation state.
References #
- Sherwood, Peter MA. “X-ray photoelectron spectroscopic studies of some iodine compounds.” Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics 72 (1976): 1805-1820.Read it online here.




