Two-photon absorption of few-electron heavy ions

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.022511· OSTI ID:22075467

Surzhykov, A ^[1]; Indelicato, P ^[2]; Santos, J P; Amaro, P ^[3]; Fritzsche, S ^[4]

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1. Physikalisches Institut, Universitaet Heidelberg, Philosophenweg 12, D-69120 Heidelberg (Germany)
2. Laboratoire Kastler Brossel, Ecole Normale Superieure, CNRS, Universite Pierre et Marie Curie-Paris 6, Case 74, 4 place Jussieu, F-75252 Paris CEDEX 05 (France)
3. Centro de Fisica Atomica, Departamento de Fisica, Faculdade de Ciencias e Tecnologia, FCT, Universidade Nova de Lisboa, P-2829-516 Caparica (Portugal)
4. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, D-64291 Darmstadt (Germany)

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.

• OSTI ID: 22075467
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
BERYLLIUM
CROSS SECTIONS
ELECTRONS
EQUATIONS
EXCITATION
HEAVY IONS
HELIUM
HYDROGEN
PERTURBATION THEORY
PHOTON-ELECTRON INTERACTIONS
PHOTONS
RELATIVISTIC RANGE