State Selective Enhanced Production of Excited Fragments and Ionic Fragments of Gaseous Si(CH_3)_2Cl_2 and Solid-State Analogs following Core-Level Excitation

摘要

State-selective fragmentation dynamics for excited fragments and ionic fragments of gaseous and condensed Si(CH_3)_2Cl_2 following Cl 2p and Si 2p core-level excitations have been characterized. The Cl 2p → 15a_1~* excitation of Si(CH_3)_2Cl_2 induces significant enhancement of the Cl~+ desorption yield in the condensed phase and the Si(CH_3)_2~+ and SiCH_3~+ yields in the gaseous phase. The core-to-Rydberg excitations at both Si 2p and Cl 2p edges lead to enhanced production of the excited fragments. These complementary results provide deeper insight into the origin of state-selective fragmentation of molecules via core-level excitation.