dorsal/arxiv
View SchemaPathways to double ionization of atoms in strong fields
| Authors | Krzysztof Sacha, Bruno Eckhardt |
|---|---|
| Categories | |
| ArXiv ID | physics/0010031 |
| URL | https://arxiv.org/abs/physics/0010031 |
| DOI | 10.1103/PhysRevA.63.043414 |
| Journal | Phys. Rev. A 63, 043414 (2001). |
Abstract
We discuss the final stages of double ionization of atoms in a strong linearly polarized laser field within a classical model. We propose that all trajectories leading to non-sequential double ionization pass close to a saddle in phase space which we identify and characterize. The saddle lies in a two degree of freedom subspace of symmetrically escaping electrons. The distribution of longitudinal momenta of ions as calculated within the subspace shows the double hump structure observed in experiments. Including a symmetric bending mode of the electrons allows us to reproduce the transverse ion momenta. We discuss also a path to sequential ionization and show that it does not lead to the observed momentum distributions.
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"abstract": "We discuss the final stages of double ionization of atoms in a strong\nlinearly polarized laser field within a classical model. We propose that all\ntrajectories leading to non-sequential double ionization pass close to a saddle\nin phase space which we identify and characterize. The saddle lies in a two\ndegree of freedom subspace of symmetrically escaping electrons. The\ndistribution of longitudinal momenta of ions as calculated within the subspace\nshows the double hump structure observed in experiments. Including a symmetric\nbending mode of the electrons allows us to reproduce the transverse ion\nmomenta. We discuss also a path to sequential ionization and show that it does\nnot lead to the observed momentum distributions.",
"arxiv_id": "physics/0010031",
"authors": [
"Krzysztof Sacha",
"Bruno Eckhardt"
],
"categories": [
"physics.atom-ph",
"nlin.CD",
"quant-ph"
],
"doi": "10.1103/PhysRevA.63.043414",
"journal_ref": "Phys. Rev. A 63, 043414 (2001).",
"title": "Pathways to double ionization of atoms in strong fields",
"url": "https://arxiv.org/abs/physics/0010031"
},
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