Abstract
SynopsisWe use a UV-pump/IR-probe scheme, combining a single attosecond UV pulse and a 750 nm IR pulse, to explore laser-assisted photoionization of the hydrogen molecule in the autoionization region. The electron energy distributions exhibit unusual streaking patterns that are explored for different angles of the electron ejection with respect to the polarization vector and the molecular axis. Moreover, by controlling the time delay between the pulses, we observe that one can suppress the autoionization channel.
Highlights
UV pulse and a femtosecond IR pulse [1]
We first investigate the behavior of the nuclear kinetic energy distributions and the electron-proton coincidence maps as a function of the time delay between the pulses
Most features can be explained in terms of perturbative transitions involving a UV photon and up to three IR photons
Summary
UV pulse and a femtosecond IR pulse [1]. The when electrons ejected in both dissociative and IR field has a relatively low intensity and can non-dissociative ionization channels are not renot ionize the molecule by itself, simplifying the solved (left panel in the figure), the distributions physics to a laser-assisted photoionization prob- follow this simple pattern. To the IR field and the latter will modify the electron motion in the continuum.
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