Disclosing rovibrational couplings and overlaps from irregularities in action spectra: Photodissociation of the 4vCH rovibrational manifold of C2H2

Xinzhi Sheng, Yuval Ganot, Salman Rosenwaks, Ilana Bar

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Abstract

The sim;243 nm photodissociation of rovibrationally excited acetylene molecules was exploited for detection of the 4νCH rovibrational manifold. The rovibrationally excited acetylene molecules were promoted to the FC region past the barrier on the ̃A1Au state and were subsequently dissociated adiabatically to C2H(̃A2∏)+H and to a smaller extent nonadiabatically to C2H̃X2Σ++H. The efficient photodissociation of the prepared states led to enhanced H production and, in particular, resulted in larger photolysis cross sections for the rovibrational transitions of the (1214°0°) state than that of low J′ transitions of the (1030°0°) state.

Original languageEnglish
Pages (from-to)6511-6518
Number of pages8
JournalJournal of Chemical Physics
Volume117
Issue number14
DOIs
StatePublished - 8 Oct 2002

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