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Above-threshold ionization with highly charged ions in superstrong laser fields. I. Coulomb-corrected strong-field approximation

MPS-Authors
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Klaiber,  Michael
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Yakaboylu,  Enderalp
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Hatsagortsyan,  Karen Zaven
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

External Resource

http://link.aps.org/doi/10.1103/PhysRevA.87.023417
(Publisher version)

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1301.5761.pdf
(Preprint), 374KB

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Citation

Klaiber, M., Yakaboylu, E., & Hatsagortsyan, K. Z. (2013). Above-threshold ionization with highly charged ions in superstrong laser fields. I. Coulomb-corrected strong-field approximation. Physical Review A, 87(2): 023417, pp. 1-8. doi:10.1103/PhysRevA.87.023417.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-F56C-C
Abstract
Aiming at the investigation of above-threshold ionization in super-strong laser fields with highly charged ions, we develop a Coulomb-corrected strong field approximation (SFA). The influence of the Coulomb potential of the atomic core on the ionized electron dynamics in the continuum is taken into account via the eikonal approximation, treating the Coulomb potential perturbatively in the phase of the quasi-classical wave function of the continuum electron. In this paper the formalism of the Coulomb-corrected SFA for the nonrelativistic regime is discussed employing velocity and length gauge. Direct ionization of a hydrogen-like system in a strong linearly polarized laser field is considered. The relation of the results in the different gauges to the Perelomov-Popov-Terent'ev imaginary-time method is discussed.