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Yuval Ganot, Salman Rosenwaks, Ilana Bar

Action Spectroscopy and Predissociation of Vibrationally Excited C₂HD

H and D photofragments, produced via vibrationally mediated photodissociation of jet-cooled C₂HD allowed measurement of vibrational and vibronic excitation action spectra of the parent as well as H and D Doppler profiles. The initial vibrational preparation at energies around 9700 cm⁻¹ enhanced C–H and C–D bond cleavage for transitions from an initially excited bent state to the upper A^~ state, rather than from a close lying state containing three C–H stretch quanta, due to favorable Franck–Condon factors for the former. The bound region of the A^~ state was accessed, resulting in non-adiabatic dissociation and slight preferential C–H over C–D bond cleavage.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 219, 05/2005
Pages: 569 - 582

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