Perturbative calculation of two-photon double electron ionization of helium

I. A. Ivanov; A. S. Kheifets

doi:10.1088/0953-4075/41/9/095002

Perturbative calculation of two-photon double electron ionization of helium

I. A. Ivanov, A. S. Kheifets

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Abstract

We report the total integrated cross-section (TICS) of two-photon double ionization of helium in the photon energy range from 40 to 54 eV. We compute the TICS in the lowest order perturbation theory (LOPT) using the length and Kramers-Henneberger gauges of the electromagnetic interaction. Our findings indicate that the LOPT gives results for the TICS in agreement with our earlier non-perturbative calculations.

Original language	English
Article number	095002
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	41
Issue number	9
DOIs	https://doi.org/10.1088/0953-4075/41/9/095002
Publication status	Published - 14 May 2008

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title = "Perturbative calculation of two-photon double electron ionization of helium",

abstract = "We report the total integrated cross-section (TICS) of two-photon double ionization of helium in the photon energy range from 40 to 54 eV. We compute the TICS in the lowest order perturbation theory (LOPT) using the length and Kramers-Henneberger gauges of the electromagnetic interaction. Our findings indicate that the LOPT gives results for the TICS in agreement with our earlier non-perturbative calculations.",

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AU - Kheifets, A. S.

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N2 - We report the total integrated cross-section (TICS) of two-photon double ionization of helium in the photon energy range from 40 to 54 eV. We compute the TICS in the lowest order perturbation theory (LOPT) using the length and Kramers-Henneberger gauges of the electromagnetic interaction. Our findings indicate that the LOPT gives results for the TICS in agreement with our earlier non-perturbative calculations.

AB - We report the total integrated cross-section (TICS) of two-photon double ionization of helium in the photon energy range from 40 to 54 eV. We compute the TICS in the lowest order perturbation theory (LOPT) using the length and Kramers-Henneberger gauges of the electromagnetic interaction. Our findings indicate that the LOPT gives results for the TICS in agreement with our earlier non-perturbative calculations.

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DO - 10.1088/0953-4075/41/9/095002

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Perturbative calculation of two-photon double electron ionization of helium

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