Action spectroscopy and predissociation of vibrationally excited C2HD Academic Article uri icon


  • Abstract H and D photofragments, produced via vibrationally mediated photodissociation of jet-cooled C 2 HD 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.

publication date

  • January 1, 2005