Abstract
We have experimentally explored laser‐induced dissociation and ionization of diatomic molecular ions, such as H2+, N2+, CO+ and ND+, using coincidence 3D momentum imaging. The vibrationally excited molecular‐ion beam (5–10 keV) is crossed by an ultrafast intense laser beam (typically 7–50 fs, 1013–1016 W/cm2 at 790 and 395 nm). The resulting fragments, including neutral fragments, are recorded in coincidence by a time‐ and position‐sensitive detector. Complete angular and kinetic energy release (KER) distributions are reconstructed from the measured momentum vectors of the fragments. For example, this experimental method enabled the observation of a surprising high KER component in N2+ dissociation despite its overlap in KER with the ionization channel.
Published Version
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