Non-sequential triple ionization in strong fields

Details Non-sequential triple ionization in strong fields Non-sequential triple ionization in strong fields

2001-07-12

arxiv.org/abs/quant-ph/0107069v1

Phys. Rev. A 64, 053401 (2001).

Physics

Quantum Physics

9 pages, 8 figures, accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.64.053401

We consider the final stage of triple ionization of atoms in a strong linearly polarized laser field. We propose that for intensities below the saturation value for triple ionization the process is dominated by the simultaneous escape of three electrons from a highly excited intermediate complex. We identify within a classical model two pathways to triple ionization, one with a triangular configuration of electrons and one with a more linear one. Both are saddles in phase space. A stability analysis indicates that the triangular configuration has the larger cross sections and should be the dominant one. Trajectory simulations within the dominant symmetry subspace reproduce the experimentally observed distribution of ion momenta parallel to the polarization axis.

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