Singularity in the electron-core potential as a gateway to accurate multielectron ionization spectra in strongly driven atoms

Emmanouilidou, A.; Peters, Michel; Katsoulis, G. P.

doi:10.1103/physreva.107.l041101

Phys. Rev. A

2023

DOI: 10.1103/physreva.107.l041101

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Singularity in the electron-core potential as a gateway to accurate multielectron ionization spectra in strongly driven atoms

A. Emmanouilidou

Michel Peters

G. P. Katsoulis

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Cited by 4 publications

References 43 publications

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Shepherd electron effects in multiple ionization of rubidium by circularly polarized intense laser fields

Liu,

Ye,

Jiang

et al. 2023

Commun Phys

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Nonsequential double/multiple ionization (NSDI/NSMI) of atoms in strong laser fields is a paradigm system for studying field-intervened electron-electron correlation. However, there exists a long-standing debated topic as to how NSDI/NSMI is triggered in a circularly-polarized laser field. In this contribution, it is shown counter-intuitively that the NSMI of alkali atoms is strongly enhanced due to a mechanism induced by their intrinsic shell structure, coined as the shepherd electron effect. Specifically, we find that the early-released outermost electron (the shepherd electron) can be stabilized on the Rydberg states even after dislodging some other inner-shell electrons and thus lead to the emergence of a transient hollow atom. Experimental signatures of the shepherd electron effect and its real-time observation with the attoclock technique are discussed. These results have substantially enriched our understanding of NSMI, beyond the well-accepted cascade recollision picture. They might have applications in coherent extreme-ultraviolet (XUV) light amplification.

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Shepherd electron effects in multiple ionization of rubidium by circularly polarized intense laser fields

Liu,

Ye,

Jiang

et al. 2023

Commun Phys

View full text Add to dashboard Cite

show abstract

Strong-field double ionization in a three-electron atom: Momentum-distribution analysis

Efimov,

Maksymov,

Zakrzewski

et al. 2023

Phys. Rev. A

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Nondipole electron momentum offset as a probe of correlated three-electron ionization in strongly driven atoms

Katsoulis,

Peters,

Emmanouilidou

2023

Phys. Rev. A

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Singularity in the electron-core potential as a gateway to accurate multielectron ionization spectra in strongly driven atoms

Cited by 4 publications

References 43 publications

Shepherd electron effects in multiple ionization of rubidium by circularly polarized intense laser fields

Shepherd electron effects in multiple ionization of rubidium by circularly polarized intense laser fields

Strong-field double ionization in a three-electron atom: Momentum-distribution analysis

Nondipole electron momentum offset as a probe of correlated three-electron ionization in strongly driven atoms

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