# Determine density of states from an XPS spectrum

1. ### abstracted6

39
I've heard any many places that the density of states (DOS) can be determined from an x-ray photoelectron spectroscopy (XPS) spectrum.

Perhaps someone more knowledgable than me can explain how this is done, or can direct me to a good resource?

Thanks!

2. ### t!m

147
Energy-resolved photoelectron spectroscopy gives almost exactly the DOS. Angle-resolved PES (ARPES) gives the band structure (which can be projected onto the energy axis to give the DOS). Strictly speaking, this conventionally gives only the occupied states and one must do inverse PES (where an electron is captured into an unoccupied state and gives off a photon with measured energy) to probe the unoccupied states.