Abstract
Momentum vectors of fragment ions produced by the Coulomb explosion of CO2z+ (z = 3–6) in an intense laser field (∼50 fs, 1 × 1015 W cm−2) are determined by the triple coincidence imaging technique. The molecular structure from symmetric and asymmetric explosion channels is reconstructed from the measured momentum vectors. The channel-dependent mean C–O bond length of ⟨r⟩ = 2.14–3.89 Å and the O–C–O bend angle of ⟨θ⟩ = 170–175° confirm substantial deformation of the molecular skeleton during the laser-molecule interaction. The channel-dependent bond length data are qualitatively described using a classical enhanced ionization model. The kinetic energy spectra reveal interesting structure which is attributed to the existence of excited states in the fragment ions.
Published Version
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