Abstract
Following photoexcitation of Cl 2p electrons to various resonances, the dissociation dynamics of ionic and excited neutral fragments of gaseous CH{sub 2}Cl{sub 2} was investigated by combined measurements of photon-induced ionic dissociation, x-ray absorption, and uv-visible dispersed fluorescence. The Cl 2p core-to-Rydberg excitations near the ionization threshold produce a notable enhancement of excited neutral fragments (C* and CH*), which is attributed to the contribution from a shake-modified resonant Auger decay and postcollision interaction. The excitation Cl 2p {yields}10 a{sub 1}* induces an enhanced yield of CH{sub 2}{sup +}, possibly originating from fast dissociation via a strongly repulsive surface. The experimental results provide insight into the dissociation dynamics of ionic and excited neutral fragment production following core-level excitation.
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