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Determine the angular and energy-resolved cross sections of helium during two-photon double ionization across sequential ionization thresholds.

October 21, 2008Physical Review AOpen Access

Triple differential cross sections and nuclear recoil in two-photon double ionization of helium

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Determine the angular and energy-resolved cross sections of helium during two-photon double ionization across sequential ionization thresholds.
Calculated triple differential cross sections (TDCSs) using the exterior complex scaling method.
Evaluated ionization dynamics both above and below the sequential ionization threshold of 54.4 eV.
Computed nuclear-recoil cross sections to capture momentum transfer to the helium nucleus.
Sequential ionization exhibits characteristic angular and energetic behaviors in the triple differential cross sections, providing an unambiguous marker to separate it from competing nonsequential ionization.
Signatures of virtual sequential ionization appear in both triple differential and nuclear-recoil cross sections below the 54.4 eV threshold.

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Implication

Computational modeling reveals distinct ionization signatures in helium atoms, indicating clear mechanisms that differentiate sequential from nonsequential two-photon double ionization pathways.

Cite This Study

Horner et al. (2008) studied this question.

synapsesocial.com/papers/6a82ad4d040bdabcf346fc3b https://doi.org/10.1103/physreva.78.043416

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Implication

Computational modeling reveals distinct ionization signatures in helium atoms, indicating clear mechanisms that differentiate sequential from nonsequential two-photon double ionization pathways.

Triple differential cross sections and nuclear recoil in two-photon double ionization of helium

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Discussion

Implication

Cite This Study

Triple differential cross sections and nuclear recoil in two-photon double ionization of helium

Key Points

Discussion

Implication

Cite This Study

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