Hi. Good starting points would be:

1. Handbook of x-ray photoelectron spectroscopy

http://www.amazon.com/Handbook-Ray-Photoelectron-Spectroscopy-624755/dp/0962702625

It has high quality survey scans of most stable elements. You can try to google the name.

2. The famous NIST XPS database

http://srdata.nist.gov/xps/main_search_menu.aspx

You can search by energy or by known elements, both options are useful for your case

When you look at survey scans you also need to identify Auger lines; I find option #1 more convenient for that.

You may also check www.lasurface.com - http://lasurface.com/database/elementxps.php

On the latter page, with the search option, you should provide some uncertainty using the "gap" parameter, to include e.g. a slight charging of your spectra (or those stored in their database ;-)

Good luck, Dirk

Thank you Lior Kornblum and Dirk Luetzenkirchen-Hecht for your valuable info