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Issue 21, 2018
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Sequential and direct ionic excitation in the strong-field ionization of 1-butene molecules

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Abstract

We study the Strong-Field Ionization (SFI) of the hydrocarbon 1-butene as a function of wavelength using photoion-photoelectron covariance and coincidence spectroscopy. We observe a striking transition in the fragment-associated photoelectron spectra: from a single Above Threshold Ionization (ATI) progression for photon energies less than the cation D0–D1 gap to two ATI progressions for a photon energy greater than this gap. For the first case, electronically excited cations are created by SFI populating the ground cationic state D0, followed by sequential post-ionization excitation. For the second case, direct sub-cycle SFI to the D1 excited cation state contributes significantly. Our experiments access ionization dynamics in a regime where strong-field and resonance-enhanced processes can interplay.

Graphical abstract: Sequential and direct ionic excitation in the strong-field ionization of 1-butene molecules

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Publication details

The article was received on 06 Dec 2017, accepted on 02 Apr 2018 and first published on 08 May 2018


Article type: Paper
DOI: 10.1039/C7CP08195B
Citation: Phys. Chem. Chem. Phys., 2018,20, 14708-14717
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    Sequential and direct ionic excitation in the strong-field ionization of 1-butene molecules

    F. Schell, A. E. Boguslavskiy, C. P. Schulz, S. Patchkovskii, M. J. J. Vrakking, A. Stolow and J. Mikosch, Phys. Chem. Chem. Phys., 2018, 20, 14708
    DOI: 10.1039/C7CP08195B

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