Te3d and Cr2p have nearly the same binding energy:
Te3d5/2 – 573 eV, Cr2p3/2 – 574 eV
Te3d3/2 – 583 eV, Cr2p1/2 – 583 eV
We have to decide which element is present in a certain system and the XPS spectrum is the only information that we have.
What information in the spectrum will help you decide which element it is?
Jürgen Weippert
An element can only be considered "present" in XPS if all lines with a substantiate cross section can be found. The Te3p at 813 eV has a cross section almost as high as the 3d peak and has no match among the Cr lines, so assuming you use Mg or Al Ka radiation, you should be able to differentiate clearly.
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