In XPS high-resolution spectra, may exist 2p3/2 peak but doesn't exist 2p1/2 peak?

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Jürgen Weippert

Normally not, that would be a very odd exception. If the Co content is low, the 2p1/2 peak may vanish upon too coarse baseline subtraction. Can you post a screenshot of the unsubtracted and subtracted spectrum?

Thomas Mayer

It is not possible to have of a p orbital only one spin orbit emission. The distance between Co2p3/2 and 1/2 is about 15 eV with 3/2 at around 780 and 1/2 at 795. Make sure your window is large enough.