dorsal/arxiv
View SchemaRelativistic and retardation effects in the two--photon ionization of hydrogen--like ions
| Authors | Peter Koval, Stephan Fritzsche, Andrey Surzhykov |
|---|---|
| Categories | |
| ArXiv ID | physics/0307114 |
| URL | https://arxiv.org/abs/physics/0307114 |
| DOI | 10.1088/0953-4075/36/5/307 |
| Journal | P.Koval, S. Fritzsche and A. Surzhikov, J. Phys. B36 (2003) 873-878 |
Abstract
The non-resonant two-photon ionization of hydrogen-like ions is studied in second-order perturbation theory, based on the Dirac equation. To carry out the summation over the complete Coulomb spectrum, a Green function approach has been applied to the computation of the ionization cross sections. Exact second-order relativistic cross sections are compared with data as obtained from a relativistic long-wavelength approximation as well as from the scaling of non-relativistic results. For high-Z ions, the relativistic wavefunction contraction may lower the two-photon ionization cross sections by a factor of two or more, while retardation effects appear less pronounced but still give rise to non-negligible contributions.
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"abstract": "The non-resonant two-photon ionization of hydrogen-like ions is studied in\nsecond-order perturbation theory, based on the Dirac equation. To carry out the\nsummation over the complete Coulomb spectrum, a Green function approach has\nbeen applied to the computation of the ionization cross sections. Exact\nsecond-order relativistic cross sections are compared with data as obtained\nfrom a relativistic long-wavelength approximation as well as from the scaling\nof non-relativistic results. For high-Z ions, the relativistic wavefunction\ncontraction may lower the two-photon ionization cross sections by a factor of\ntwo or more, while retardation effects appear less pronounced but still give\nrise to non-negligible contributions.",
"arxiv_id": "physics/0307114",
"authors": [
"Peter Koval",
"Stephan Fritzsche",
"Andrey Surzhykov"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1088/0953-4075/36/5/307",
"journal_ref": "P.Koval, S. Fritzsche and A. Surzhikov, J. Phys. B36 (2003)\n 873-878",
"title": "Relativistic and retardation effects in the two--photon ionization of hydrogen--like ions",
"url": "https://arxiv.org/abs/physics/0307114"
},
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