Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW A 82, 053414 (2010); DOI: 10.1103/PhysRevA.82.053414. Copyright © 2010 The American Physical Society. Used by permission.


Potential barriers in the effective radial potential experienced by a photoexcited electron are shown to result in dramatic, resonancelike effects in two-photon ionization processes. In a two-photon ionization process, such potential barriers may affect not only the final state of the electron (as in ordinary photoionization), but also the intermediate-state electron wave packet corresponding to the absorption of one photon. We illustrate these effects for the generalized two-photon cross sections for ionization of Ar and Xe within a single-active-electron, central-potential model.

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