CFA FCT/UNL is one of the two scientific groups of Centro de Física Atómica (CFA). Most of its members belong to Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa (FCTUNL).
Two-photon absorption of few-electron heavy ions
| Title | Two-photon absorption of few-electron heavy ions |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Surzhykov, A., Indelicato P., Santos J. P., Amaro P., Stöhlker Th, and Fritzsche S. |
| Journal | Physical Review A |
| Volume | 84 |
| Pagination | 022511 |
| Keywords | PACS: 32.90.+a, 32.80.Rm, 32.80.Wr, 31.10.+z |
| Abstract | 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. |
| URL | http://link.aps.org/doi/10.1103/PhysRevA.84.022511 |
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