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    • Ultrafast Relaxation Dynamics Observed Through Time-Resolved Photoelectron Angular DistributionsPeer reviewedClosed access 

      2010, LECOINTRE, Julien; Roberts, G.M.; Horke, D. A.; Verlet, J.R.R., HENALLUX
      Article scientifique
      Time-resolved photoelectron imaging of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion is presented. Photoelectron angular distributions (PADs) are qualitatively analyzed in terms of the simple s-p model that is based on symmetry arguments. The internal conversion dynamics from the first excited state (12B3u) to the ground state (2B2g) may be observed through temporal changes in the PADs ...

    • Velocity-map imaging at low extraction fieldsPeer reviewedClosed access 

      2012, LECOINTRE, Julien; Horke, D. A.; Roberts, G. M.; Verlet, J. R. R., HENALLUX
      Article scientifique
      We present a velocity-map imaging (VMI) setup for photoelectron imaging that utilizes low electric extraction fields. This avoids any complications that could arise from electrostatic interactions between the extraction field and the molecular properties that are probed and has a minimal effect on the trajectory of ions in ion beam experiments. By using an attractive potential supplied to the detector, ...