J.A. Davies, J.E. LeClaire, R.E. Continetti, and C.C. Hayden, "Femtosecond Time-Resolved Photoelectron-Photoion Coincidence Imaging Studies of Dissociation Dynamics", J. Chem. Phys. 111, 1-4 (1999).
We present the first results using a new technique that combines femtosecond pump-probe methods with energy- and angle-resolved photoelectron-photoion coincidence imaging. The dominant dissociative multiphoton ionization (DMI) pathway for NO2 at 375.3 nm is identified as three-photon excitation to a repulsive potential surface correlating to NO(C2Pi) + O(3P) followed by one-photon ionization to NO+(X1Sigma+). Dissociation along this surface is followed on a femtosecond timescale.