Abstract

We used the energy-selected-photoelectron photoion coincidence method, the resonance-Auger-electron photoion coincidence method and monochromatized synchrotron-radiation to study ion desorption caused by N 1s core-level photoexcitation of nitrous oxide (N 2O) condensed and physisorbed on a Si(1 0 0) surface. The site-specificity was kept during the resonant Auger processes, that is, within the N 1s core-hole lifetime. However, the site-specific ion desorption was not clearly revealed, though some site-specificity had been reported in the vapor phase. The origin of the disappearance of the site-specificity was discussed in detail.

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