Abstract
We present quantum mechanical calculations of the electron and ion momentum distributions following double ionization of a one-dimensional helium atom by ultrashort laser pulses (780 nm) at various intensities. The two-electron momentum distributions exhibit a clear transition from nonsequential to sequential double ionization. We provide strong evidence that rescattering is responsible for nonsequential ionization by calculating the momentum spectrum of the He2+ recoil ions-which we find in excellent agreement with recent experiments-and by analyzing the electronic center-of-mass motion via Wigner transforms.
Keywords
Double ionizationAtomic physicsIonizationRecoilPhysicsIonHeliumElectronMomentum (technical analysis)Helium atomNuclear physicsQuantum mechanics
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Publication Info
- Year
- 2000
- Type
- article
- Volume
- 85
- Issue
- 22
- Pages
- 4707-4710
- Citations
- 301
- Access
- Closed
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Cite This
Manfred Lein,
E. K. U. Gross,
Volker Engel
(2000).
Intense-Field Double Ionization of Helium: Identifying the Mechanism.
Physical Review Letters
, 85
(22)
, 4707-4710.
https://doi.org/10.1103/physrevlett.85.4707
Identifiers
- DOI
- 10.1103/physrevlett.85.4707