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Threshold-related effects on the high energy plateau in above-threshold detachment

  • Strong Field Phenomena
  • Published:
Laser Physics

Abstract

We present results of a nonperturbative Floquet study of above-threshold detachment (ATD) of the H− and F− negative ions. Pronounced enhancements of ATD rates in the high-energy plateau region are found as the laser field intensity passes across ponderomotively shifted multiphoton thresholds. Depending on the symmetry of the initial state (s or p symmetry), the enhancement is found to be most pronounced for even-or odd-channel closures, which is consistent with threshold laws applicable at the closing of particular multiphoton channels. Variations of ATD photoelectron angular distributions as functions of laser intensity near multiphoton thresholds are also investigated.

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Authors and Affiliations

  1. Department of Physics and Astronomy, The University of Nebraska, NE, 68588-0111, Lincoln, USA

    K. Krajewska, I. I. Fabrikant & A. F. Starace

  2. Institute of Theoretical Physics, Warsaw University, Hż 69, 00-681, Warszawa, Poland

    K. Krajewska

Authors
  1. K. Krajewska
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  2. I. I. Fabrikant
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  3. A. F. Starace
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Original Text © Astro, Ltd., 2007.

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Krajewska, K., Fabrikant, I.I. & Starace, A.F. Threshold-related effects on the high energy plateau in above-threshold detachment. Laser Phys. 17, 368–375 (2007). https://doi.org/10.1134/S1054660X07040123

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  • DOI: https://doi.org/10.1134/S1054660X07040123

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