Two-photon absorption of few-electron heavy ions

The two-photon absorption of few-electron ions has been studied by using second-order perturbation theory and Dirac's relativistic equation. Within this framework, the general expressions for the excitation cross sections and rates are derived including a full account of the higher-order multip...

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Hauptverfasser: Surzhykov, Andrey (VerfasserIn) , Indelicato, P. (VerfasserIn) , Santos, J. P. (VerfasserIn) , Amaro, P. (VerfasserIn) , Fritzsche, S. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 24 August 2011
In: Physical review. A, Atomic, molecular, and optical physics
Year: 2011, Jahrgang: 84, Heft: 2, Pages: 1-10
ISSN:1094-1622
DOI:10.1103/PhysRevA.84.022511
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.84.022511
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.84.022511
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Verfasserangaben:A. Surzhykov, P. Indelicato, J.P. Santos, P. Amaro, and S. Fritzsche

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520 |a The two-photon absorption of few-electron ions has been studied by using second-order perturbation theory and Dirac's relativistic equation. Within this framework, the general expressions for the excitation cross sections and rates are derived including a full account of the higher-order multipole terms in the expansion of the electron-photon interaction. While these expressions can be applied to any ion, independent of its particular shell structure, detailed computations are carried out for the two-photon absorption of hydrogen-, helium-, and berylliumlike ions and are compared with the available theoretical and experimental data. The importance of relativistic and nondipole effects in the analysis and computation of induced two-photon transitions is pointed out. Moreover, we discuss the potential of these transitions for atomic parity-violation studies in the high-Z domain. 
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