Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 26: Poster Session II

A 26.36: Poster

Wednesday, March 8, 2017, 17:00–19:00, P OG1

Direct Observation and Characterization of Multiple Strong-Field Ionization Continua Participating in Electron Rescattering — •Felix Schell, Timm Bredtmann, Serguei Patchkovskii, Marc Vrakking, Claus Peter Schulz, and Jochen Mikosch — Max Born Institute, Berlin, Germany

In laser-driven electron rescattering, the field of an intense fs laser pulse first ionizes a molecule and then accelerates the released electron back to the core, from which it scatters elastically. For polyatomic molecules, multiple ionization continua originating from the homo and lower-lying states are known to be populated and thus expected to contribute to the signal of rescattered electrons. In this study, we separate electron rescattering correlated to different ion states in the strong-field ionization of 1,3-butadiene molecules. We extend the crati technique [1] to the recollision regime using a reaction microscope. We measure the channel-resolved rescattering yield as a function of ellipticity and - for laser-aligned molecules - in the molecular frame. The observed trends are rationalized by the anticipated nodal structure of the continuum electron wavepackets originating from the respective Dyson orbitals. These qualitative expectations are confirmed by multi-orbital td-ris [2] calculations.
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