Production of neutral fragments of gaseous SiCl4 following Si 2p core-level excitation studied by dispersed fluorescence spectroscopy

Abstract

State-specific dissociation dynamics for ionic fragments and excited fragments of gaseous SiCl4 following Si 2p core-level excitation have been characterized by the dispersed UV/optical fluorescence spectroscopy and photionization mass spectroscopy. The Si 2p core-to-Rydberg excitation leads to a noteworthy production of excited atomic fragments, neutral and ionic (Si-*, Si+*). In particular, the excited neutral atomic fragments Si* are significantly reinforced. The Si 2p core-to-valence excitation generates an enhancement of excited molecular-ion SiCl4+. The experimental results provide deeper insight into the dissociation dynamics for excited neutral fragments of molecules via core-level excitation. (c) 2006 Elsevier Ltd. All rights reserved.