Relativistic and retardation effects in the two--photon ionization of hydrogen--like ions
Atomic Physics
2009-11-10 v1
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.
Keywords
Cite
@article{arxiv.physics/0307114,
title = {Relativistic and retardation effects in the two--photon ionization of hydrogen--like ions},
author = {Peter Koval and Stephan Fritzsche and Andrey Surzhykov},
journal= {arXiv preprint arXiv:physics/0307114},
year = {2009}
}
Comments
6 pages, 2 figures