INITIAL AND FINAL-STATE EFFECTS IN THE PHOTOELECTRON AND AUGER-SPECTRA OF SI AND AL BONDED IN ZEOLITES

The dependence of the core level binding energies, E-b, of Si, Al, and O bonded in zeolites on the concentration of skeletal Al is investiga ted. The line shape changes of Al KLL Auger spectra appearing with dec reasing concentration of Al in zeolites are described. Initial and fin al state effects influencing core level binding energies of zeolites a re discussed on a qualitative level. Different screening of the hole s tates localized on Al and Si is demonstrated. Evidence is shown for th e dominant influence of initial state effects on the core level E-b va lues of Si and Al.