TY - JOUR
T1 - Two-photon absorption of few-electron heavy ions
AU - Surzhykov, A.
AU - Indelicato, P.
AU - Santos, J. P.
AU - Amaro, P.
AU - Fritzsche, S.
N1 - The work reported in this paper was supported by the Helmholtz Gemeinschaft (Nachwuchsgruppe VH-NG-421). S.F. acknowledges support by the FiDiPro programme of the Finnish Academy. Laboratoire Kastler Brossel is Unite Mixte de Recherche du CNRS, de l' ENS et de l' UPMC No. 8552. We also thank the Helmholtz Alliance HA216/EMMI, the FCT (Contract No. PEst-OE/FIS/UI0303/2011, Centro de Fisica Atomica), the PESSOA Hubert Curien Program (Program No. 441.00), the Accoes Integradas Luso-Francesas (Grant No. F-11/09), as well as the Accoes Integradas Luso-Alemas (Grant No. A-19/09). P.A. acknowledges support by the FCT under Contract No. SFRH/BD/37404/2007.
PY - 2011/8/24
Y1 - 2011/8/24
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=80052012971&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.84.022511
DO - 10.1103/PhysRevA.84.022511
M3 - Article
AN - SCOPUS:80052012971
SN - 1050-2947
VL - 84
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 2
M1 - 022511
ER -